From b24413180f5600bcb3bb70fbed5cf186b60864bd Mon Sep 17 00:00:00 2001 From: Greg Kroah-Hartman Date: Wed, 1 Nov 2017 15:07:57 +0100 Subject: License cleanup: add SPDX GPL-2.0 license identifier to files with no license Many source files in the tree are missing licensing information, which makes it harder for compliance tools to determine the correct license. By default all files without license information are under the default license of the kernel, which is GPL version 2. Update the files which contain no license information with the 'GPL-2.0' SPDX license identifier. The SPDX identifier is a legally binding shorthand, which can be used instead of the full boiler plate text. This patch is based on work done by Thomas Gleixner and Kate Stewart and Philippe Ombredanne. How this work was done: Patches were generated and checked against linux-4.14-rc6 for a subset of the use cases: - file had no licensing information it it. - file was a */uapi/* one with no licensing information in it, - file was a */uapi/* one with existing licensing information, Further patches will be generated in subsequent months to fix up cases where non-standard license headers were used, and references to license had to be inferred by heuristics based on keywords. The analysis to determine which SPDX License Identifier to be applied to a file was done in a spreadsheet of side by side results from of the output of two independent scanners (ScanCode & Windriver) producing SPDX tag:value files created by Philippe Ombredanne. Philippe prepared the base worksheet, and did an initial spot review of a few 1000 files. The 4.13 kernel was the starting point of the analysis with 60,537 files assessed. Kate Stewart did a file by file comparison of the scanner results in the spreadsheet to determine which SPDX license identifier(s) to be applied to the file. She confirmed any determination that was not immediately clear with lawyers working with the Linux Foundation. Criteria used to select files for SPDX license identifier tagging was: - Files considered eligible had to be source code files. - Make and config files were included as candidates if they contained >5 lines of source - File already had some variant of a license header in it (even if <5 lines). All documentation files were explicitly excluded. The following heuristics were used to determine which SPDX license identifiers to apply. - when both scanners couldn't find any license traces, file was considered to have no license information in it, and the top level COPYING file license applied. For non */uapi/* files that summary was: SPDX license identifier # files ---------------------------------------------------|------- GPL-2.0 11139 and resulted in the first patch in this series. If that file was a */uapi/* path one, it was "GPL-2.0 WITH Linux-syscall-note" otherwise it was "GPL-2.0". Results of that was: SPDX license identifier # files ---------------------------------------------------|------- GPL-2.0 WITH Linux-syscall-note 930 and resulted in the second patch in this series. - if a file had some form of licensing information in it, and was one of the */uapi/* ones, it was denoted with the Linux-syscall-note if any GPL family license was found in the file or had no licensing in it (per prior point). Results summary: SPDX license identifier # files ---------------------------------------------------|------ GPL-2.0 WITH Linux-syscall-note 270 GPL-2.0+ WITH Linux-syscall-note 169 ((GPL-2.0 WITH Linux-syscall-note) OR BSD-2-Clause) 21 ((GPL-2.0 WITH Linux-syscall-note) OR BSD-3-Clause) 17 LGPL-2.1+ WITH Linux-syscall-note 15 GPL-1.0+ WITH Linux-syscall-note 14 ((GPL-2.0+ WITH Linux-syscall-note) OR BSD-3-Clause) 5 LGPL-2.0+ WITH Linux-syscall-note 4 LGPL-2.1 WITH Linux-syscall-note 3 ((GPL-2.0 WITH Linux-syscall-note) OR MIT) 3 ((GPL-2.0 WITH Linux-syscall-note) AND MIT) 1 and that resulted in the third patch in this series. - when the two scanners agreed on the detected license(s), that became the concluded license(s). - when there was disagreement between the two scanners (one detected a license but the other didn't, or they both detected different licenses) a manual inspection of the file occurred. - In most cases a manual inspection of the information in the file resulted in a clear resolution of the license that should apply (and which scanner probably needed to revisit its heuristics). - When it was not immediately clear, the license identifier was confirmed with lawyers working with the Linux Foundation. - If there was any question as to the appropriate license identifier, the file was flagged for further research and to be revisited later in time. In total, over 70 hours of logged manual review was done on the spreadsheet to determine the SPDX license identifiers to apply to the source files by Kate, Philippe, Thomas and, in some cases, confirmation by lawyers working with the Linux Foundation. Kate also obtained a third independent scan of the 4.13 code base from FOSSology, and compared selected files where the other two scanners disagreed against that SPDX file, to see if there was new insights. The Windriver scanner is based on an older version of FOSSology in part, so they are related. Thomas did random spot checks in about 500 files from the spreadsheets for the uapi headers and agreed with SPDX license identifier in the files he inspected. For the non-uapi files Thomas did random spot checks in about 15000 files. In initial set of patches against 4.14-rc6, 3 files were found to have copy/paste license identifier errors, and have been fixed to reflect the correct identifier. Additionally Philippe spent 10 hours this week doing a detailed manual inspection and review of the 12,461 patched files from the initial patch version early this week with: - a full scancode scan run, collecting the matched texts, detected license ids and scores - reviewing anything where there was a license detected (about 500+ files) to ensure that the applied SPDX license was correct - reviewing anything where there was no detection but the patch license was not GPL-2.0 WITH Linux-syscall-note to ensure that the applied SPDX license was correct This produced a worksheet with 20 files needing minor correction. This worksheet was then exported into 3 different .csv files for the different types of files to be modified. These .csv files were then reviewed by Greg. Thomas wrote a script to parse the csv files and add the proper SPDX tag to the file, in the format that the file expected. This script was further refined by Greg based on the output to detect more types of files automatically and to distinguish between header and source .c files (which need different comment types.) Finally Greg ran the script using the .csv files to generate the patches. Reviewed-by: Kate Stewart Reviewed-by: Philippe Ombredanne Reviewed-by: Thomas Gleixner Signed-off-by: Greg Kroah-Hartman --- include/linux/pagevec.h | 1 + 1 file changed, 1 insertion(+) (limited to 'include/linux/pagevec.h') diff --git a/include/linux/pagevec.h b/include/linux/pagevec.h index 4dcd5506f1ed..2636c0c0f279 100644 --- a/include/linux/pagevec.h +++ b/include/linux/pagevec.h @@ -1,3 +1,4 @@ +/* SPDX-License-Identifier: GPL-2.0 */ /* * include/linux/pagevec.h * -- cgit v1.2.3 From 72b045aecdd856b083521f2a963705b4c2e59680 Mon Sep 17 00:00:00 2001 From: Jan Kara Date: Wed, 15 Nov 2017 17:34:33 -0800 Subject: mm: implement find_get_pages_range_tag() Patch series "Ranged pagevec tagged lookup", v3. In this series I provide a ranged variant of pagevec_lookup_tag() and use it in places where it makes sense. This series removes some common code and it also has a potential for speeding up some operations similarly as for pagevec_lookup_range() (but for now I can think of only artificial cases where this happens). This patch (of 16): Implement a variant of find_get_pages_tag() that stops iterating at given index. Lots of users of this function (through pagevec_lookup()) actually want a range lookup and all of them are currently open-coding this. Also create corresponding pagevec_lookup_range_tag() function. Link: http://lkml.kernel.org/r/20171009151359.31984-2-jack@suse.cz Signed-off-by: Jan Kara Reviewed-by: Daniel Jordan Cc: Bob Peterson Cc: Chao Yu Cc: David Howells Cc: David Sterba Cc: Ilya Dryomov Cc: Jaegeuk Kim Cc: Ryusuke Konishi Cc: Steve French Cc: "Theodore Ts'o" Cc: "Yan, Zheng" Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- include/linux/pagemap.h | 12 ++++++++++-- include/linux/pagevec.h | 11 +++++++++-- mm/filemap.c | 33 ++++++++++++++++++++++++--------- mm/swap.c | 9 +++++---- 4 files changed, 48 insertions(+), 17 deletions(-) (limited to 'include/linux/pagevec.h') diff --git a/include/linux/pagemap.h b/include/linux/pagemap.h index e08b5339023c..956d6a80e126 100644 --- a/include/linux/pagemap.h +++ b/include/linux/pagemap.h @@ -366,8 +366,16 @@ static inline unsigned find_get_pages(struct address_space *mapping, } unsigned find_get_pages_contig(struct address_space *mapping, pgoff_t start, unsigned int nr_pages, struct page **pages); -unsigned find_get_pages_tag(struct address_space *mapping, pgoff_t *index, - int tag, unsigned int nr_pages, struct page **pages); +unsigned find_get_pages_range_tag(struct address_space *mapping, pgoff_t *index, + pgoff_t end, int tag, unsigned int nr_pages, + struct page **pages); +static inline unsigned find_get_pages_tag(struct address_space *mapping, + pgoff_t *index, int tag, unsigned int nr_pages, + struct page **pages) +{ + return find_get_pages_range_tag(mapping, index, (pgoff_t)-1, tag, + nr_pages, pages); +} unsigned find_get_entries_tag(struct address_space *mapping, pgoff_t start, int tag, unsigned int nr_entries, struct page **entries, pgoff_t *indices); diff --git a/include/linux/pagevec.h b/include/linux/pagevec.h index 2636c0c0f279..afc718f586f8 100644 --- a/include/linux/pagevec.h +++ b/include/linux/pagevec.h @@ -38,9 +38,16 @@ static inline unsigned pagevec_lookup(struct pagevec *pvec, return pagevec_lookup_range(pvec, mapping, start, (pgoff_t)-1); } -unsigned pagevec_lookup_tag(struct pagevec *pvec, +unsigned pagevec_lookup_range_tag(struct pagevec *pvec, + struct address_space *mapping, pgoff_t *index, pgoff_t end, + int tag, unsigned nr_pages); +static inline unsigned pagevec_lookup_tag(struct pagevec *pvec, struct address_space *mapping, pgoff_t *index, int tag, - unsigned nr_pages); + unsigned nr_pages) +{ + return pagevec_lookup_range_tag(pvec, mapping, index, (pgoff_t)-1, tag, + nr_pages); +} static inline void pagevec_init(struct pagevec *pvec, int cold) { diff --git a/mm/filemap.c b/mm/filemap.c index 594d73fef8b4..cf74d0dacc6a 100644 --- a/mm/filemap.c +++ b/mm/filemap.c @@ -1754,9 +1754,10 @@ repeat: EXPORT_SYMBOL(find_get_pages_contig); /** - * find_get_pages_tag - find and return pages that match @tag + * find_get_pages_range_tag - find and return pages in given range matching @tag * @mapping: the address_space to search * @index: the starting page index + * @end: The final page index (inclusive) * @tag: the tag index * @nr_pages: the maximum number of pages * @pages: where the resulting pages are placed @@ -1764,8 +1765,9 @@ EXPORT_SYMBOL(find_get_pages_contig); * Like find_get_pages, except we only return pages which are tagged with * @tag. We update @index to index the next page for the traversal. */ -unsigned find_get_pages_tag(struct address_space *mapping, pgoff_t *index, - int tag, unsigned int nr_pages, struct page **pages) +unsigned find_get_pages_range_tag(struct address_space *mapping, pgoff_t *index, + pgoff_t end, int tag, unsigned int nr_pages, + struct page **pages) { struct radix_tree_iter iter; void **slot; @@ -1778,6 +1780,9 @@ unsigned find_get_pages_tag(struct address_space *mapping, pgoff_t *index, radix_tree_for_each_tagged(slot, &mapping->page_tree, &iter, *index, tag) { struct page *head, *page; + + if (iter.index > end) + break; repeat: page = radix_tree_deref_slot(slot); if (unlikely(!page)) @@ -1819,18 +1824,28 @@ repeat: } pages[ret] = page; - if (++ret == nr_pages) - break; + if (++ret == nr_pages) { + *index = pages[ret - 1]->index + 1; + goto out; + } } + /* + * We come here when we got at @end. We take care to not overflow the + * index @index as it confuses some of the callers. This breaks the + * iteration when there is page at index -1 but that is already broken + * anyway. + */ + if (end == (pgoff_t)-1) + *index = (pgoff_t)-1; + else + *index = end + 1; +out: rcu_read_unlock(); - if (ret) - *index = pages[ret - 1]->index + 1; - return ret; } -EXPORT_SYMBOL(find_get_pages_tag); +EXPORT_SYMBOL(find_get_pages_range_tag); /** * find_get_entries_tag - find and return entries that match @tag diff --git a/mm/swap.c b/mm/swap.c index a77d68f2c1b6..e1c74eb8a775 100644 --- a/mm/swap.c +++ b/mm/swap.c @@ -986,14 +986,15 @@ unsigned pagevec_lookup_range(struct pagevec *pvec, } EXPORT_SYMBOL(pagevec_lookup_range); -unsigned pagevec_lookup_tag(struct pagevec *pvec, struct address_space *mapping, - pgoff_t *index, int tag, unsigned nr_pages) +unsigned pagevec_lookup_range_tag(struct pagevec *pvec, + struct address_space *mapping, pgoff_t *index, pgoff_t end, + int tag, unsigned nr_pages) { - pvec->nr = find_get_pages_tag(mapping, index, tag, + pvec->nr = find_get_pages_range_tag(mapping, index, end, tag, nr_pages, pvec->pages); return pagevec_count(pvec); } -EXPORT_SYMBOL(pagevec_lookup_tag); +EXPORT_SYMBOL(pagevec_lookup_range_tag); /* * Perform any setup for the swap system -- cgit v1.2.3 From 93d3b7140ad379885849ad2674b4290c9e8273da Mon Sep 17 00:00:00 2001 From: Jan Kara Date: Wed, 15 Nov 2017 17:35:12 -0800 Subject: mm: add variant of pagevec_lookup_range_tag() taking number of pages Currently pagevec_lookup_range_tag() takes number of pages to look up but most users don't need this. Create a new function pagevec_lookup_range_nr_tag() that takes maximum number of pages to lookup for Ceph which wants this functionality so that we can drop nr_pages argument from pagevec_lookup_range_tag(). Link: http://lkml.kernel.org/r/20171009151359.31984-13-jack@suse.cz Signed-off-by: Jan Kara Reviewed-by: Daniel Jordan Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- include/linux/pagevec.h | 3 +++ mm/swap.c | 9 +++++++++ 2 files changed, 12 insertions(+) (limited to 'include/linux/pagevec.h') diff --git a/include/linux/pagevec.h b/include/linux/pagevec.h index afc718f586f8..87a2dfd62f5e 100644 --- a/include/linux/pagevec.h +++ b/include/linux/pagevec.h @@ -41,6 +41,9 @@ static inline unsigned pagevec_lookup(struct pagevec *pvec, unsigned pagevec_lookup_range_tag(struct pagevec *pvec, struct address_space *mapping, pgoff_t *index, pgoff_t end, int tag, unsigned nr_pages); +unsigned pagevec_lookup_range_nr_tag(struct pagevec *pvec, + struct address_space *mapping, pgoff_t *index, pgoff_t end, + int tag, unsigned max_pages); static inline unsigned pagevec_lookup_tag(struct pagevec *pvec, struct address_space *mapping, pgoff_t *index, int tag, unsigned nr_pages) diff --git a/mm/swap.c b/mm/swap.c index e1c74eb8a775..6c50fec2da92 100644 --- a/mm/swap.c +++ b/mm/swap.c @@ -996,6 +996,15 @@ unsigned pagevec_lookup_range_tag(struct pagevec *pvec, } EXPORT_SYMBOL(pagevec_lookup_range_tag); +unsigned pagevec_lookup_range_nr_tag(struct pagevec *pvec, + struct address_space *mapping, pgoff_t *index, pgoff_t end, + int tag, unsigned max_pages) +{ + pvec->nr = find_get_pages_range_tag(mapping, index, end, tag, + min_t(unsigned int, max_pages, PAGEVEC_SIZE), pvec->pages); + return pagevec_count(pvec); +} +EXPORT_SYMBOL(pagevec_lookup_range_nr_tag); /* * Perform any setup for the swap system */ -- cgit v1.2.3 From 67fd707f468142d0f689a6240044bb45c1913003 Mon Sep 17 00:00:00 2001 From: Jan Kara Date: Wed, 15 Nov 2017 17:35:19 -0800 Subject: mm: remove nr_pages argument from pagevec_lookup_{,range}_tag() All users of pagevec_lookup() and pagevec_lookup_range() now pass PAGEVEC_SIZE as a desired number of pages. Just drop the argument. Link: http://lkml.kernel.org/r/20171009151359.31984-15-jack@suse.cz Signed-off-by: Jan Kara Reviewed-by: Daniel Jordan Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- fs/btrfs/extent_io.c | 6 +++--- fs/ceph/addr.c | 3 +-- fs/ext4/inode.c | 2 +- fs/f2fs/checkpoint.c | 2 +- fs/f2fs/data.c | 2 +- fs/f2fs/node.c | 8 ++++---- fs/gfs2/aops.c | 2 +- fs/nilfs2/btree.c | 4 ++-- fs/nilfs2/page.c | 7 +++---- fs/nilfs2/segment.c | 6 +++--- include/linux/pagevec.h | 8 +++----- mm/filemap.c | 2 +- mm/page-writeback.c | 2 +- mm/swap.c | 4 ++-- 14 files changed, 27 insertions(+), 31 deletions(-) (limited to 'include/linux/pagevec.h') diff --git a/fs/btrfs/extent_io.c b/fs/btrfs/extent_io.c index c18cf5d59521..93fdaac81212 100644 --- a/fs/btrfs/extent_io.c +++ b/fs/btrfs/extent_io.c @@ -3815,7 +3815,7 @@ retry: tag_pages_for_writeback(mapping, index, end); while (!done && !nr_to_write_done && (index <= end) && (nr_pages = pagevec_lookup_range_tag(&pvec, mapping, &index, end, - tag, PAGEVEC_SIZE))) { + tag))) { unsigned i; scanned = 1; @@ -3956,8 +3956,8 @@ retry: tag_pages_for_writeback(mapping, index, end); done_index = index; while (!done && !nr_to_write_done && (index <= end) && - (nr_pages = pagevec_lookup_range_tag(&pvec, mapping, &index, end, - tag, PAGEVEC_SIZE))) { + (nr_pages = pagevec_lookup_range_tag(&pvec, mapping, + &index, end, tag))) { unsigned i; scanned = 1; diff --git a/fs/ceph/addr.c b/fs/ceph/addr.c index 0fc2987cb62d..26c682db94ee 100644 --- a/fs/ceph/addr.c +++ b/fs/ceph/addr.c @@ -1162,8 +1162,7 @@ release_pvec_pages: index = 0; while ((index <= end) && (nr = pagevec_lookup_tag(&pvec, mapping, &index, - PAGECACHE_TAG_WRITEBACK, - PAGEVEC_SIZE))) { + PAGECACHE_TAG_WRITEBACK))) { for (i = 0; i < nr; i++) { page = pvec.pages[i]; if (page_snap_context(page) != snapc) diff --git a/fs/ext4/inode.c b/fs/ext4/inode.c index 3d0708c91c5a..b239a41dbeeb 100644 --- a/fs/ext4/inode.c +++ b/fs/ext4/inode.c @@ -2621,7 +2621,7 @@ static int mpage_prepare_extent_to_map(struct mpage_da_data *mpd) mpd->next_page = index; while (index <= end) { nr_pages = pagevec_lookup_range_tag(&pvec, mapping, &index, end, - tag, PAGEVEC_SIZE); + tag); if (nr_pages == 0) goto out; diff --git a/fs/f2fs/checkpoint.c b/fs/f2fs/checkpoint.c index fb74ec4ed9d2..6124f8710dc3 100644 --- a/fs/f2fs/checkpoint.c +++ b/fs/f2fs/checkpoint.c @@ -319,7 +319,7 @@ long sync_meta_pages(struct f2fs_sb_info *sbi, enum page_type type, blk_start_plug(&plug); while ((nr_pages = pagevec_lookup_tag(&pvec, mapping, &index, - PAGECACHE_TAG_DIRTY, PAGEVEC_SIZE))) { + PAGECACHE_TAG_DIRTY))) { int i; for (i = 0; i < nr_pages; i++) { diff --git a/fs/f2fs/data.c b/fs/f2fs/data.c index 17d2c2997ddd..687703755824 100644 --- a/fs/f2fs/data.c +++ b/fs/f2fs/data.c @@ -1670,7 +1670,7 @@ retry: int i; nr_pages = pagevec_lookup_range_tag(&pvec, mapping, &index, end, - tag, PAGEVEC_SIZE); + tag); if (nr_pages == 0) break; diff --git a/fs/f2fs/node.c b/fs/f2fs/node.c index ca020e7d7465..d6e4df0bb622 100644 --- a/fs/f2fs/node.c +++ b/fs/f2fs/node.c @@ -1286,7 +1286,7 @@ static struct page *last_fsync_dnode(struct f2fs_sb_info *sbi, nid_t ino) index = 0; while ((nr_pages = pagevec_lookup_tag(&pvec, NODE_MAPPING(sbi), &index, - PAGECACHE_TAG_DIRTY, PAGEVEC_SIZE))) { + PAGECACHE_TAG_DIRTY))) { int i; for (i = 0; i < nr_pages; i++) { @@ -1440,7 +1440,7 @@ retry: index = 0; while ((nr_pages = pagevec_lookup_tag(&pvec, NODE_MAPPING(sbi), &index, - PAGECACHE_TAG_DIRTY, PAGEVEC_SIZE))) { + PAGECACHE_TAG_DIRTY))) { int i; for (i = 0; i < nr_pages; i++) { @@ -1553,7 +1553,7 @@ next_step: index = 0; while ((nr_pages = pagevec_lookup_tag(&pvec, NODE_MAPPING(sbi), &index, - PAGECACHE_TAG_DIRTY, PAGEVEC_SIZE))) { + PAGECACHE_TAG_DIRTY))) { int i; for (i = 0; i < nr_pages; i++) { @@ -1651,7 +1651,7 @@ int wait_on_node_pages_writeback(struct f2fs_sb_info *sbi, nid_t ino) pagevec_init(&pvec, 0); while ((nr_pages = pagevec_lookup_tag(&pvec, NODE_MAPPING(sbi), &index, - PAGECACHE_TAG_WRITEBACK, PAGEVEC_SIZE))) { + PAGECACHE_TAG_WRITEBACK))) { int i; for (i = 0; i < nr_pages; i++) { diff --git a/fs/gfs2/aops.c b/fs/gfs2/aops.c index d0848d9623fb..3fea3d7780b0 100644 --- a/fs/gfs2/aops.c +++ b/fs/gfs2/aops.c @@ -398,7 +398,7 @@ retry: done_index = index; while (!done && (index <= end)) { nr_pages = pagevec_lookup_range_tag(&pvec, mapping, &index, end, - tag, PAGEVEC_SIZE); + tag); if (nr_pages == 0) break; diff --git a/fs/nilfs2/btree.c b/fs/nilfs2/btree.c index 06ffa135dfa6..35989c7bb065 100644 --- a/fs/nilfs2/btree.c +++ b/fs/nilfs2/btree.c @@ -2158,8 +2158,8 @@ static void nilfs_btree_lookup_dirty_buffers(struct nilfs_bmap *btree, pagevec_init(&pvec, 0); - while (pagevec_lookup_tag(&pvec, btcache, &index, PAGECACHE_TAG_DIRTY, - PAGEVEC_SIZE)) { + while (pagevec_lookup_tag(&pvec, btcache, &index, + PAGECACHE_TAG_DIRTY)) { for (i = 0; i < pagevec_count(&pvec); i++) { bh = head = page_buffers(pvec.pages[i]); do { diff --git a/fs/nilfs2/page.c b/fs/nilfs2/page.c index 8616c46d33da..1c16726915c1 100644 --- a/fs/nilfs2/page.c +++ b/fs/nilfs2/page.c @@ -257,8 +257,7 @@ int nilfs_copy_dirty_pages(struct address_space *dmap, pagevec_init(&pvec, 0); repeat: - if (!pagevec_lookup_tag(&pvec, smap, &index, PAGECACHE_TAG_DIRTY, - PAGEVEC_SIZE)) + if (!pagevec_lookup_tag(&pvec, smap, &index, PAGECACHE_TAG_DIRTY)) return 0; for (i = 0; i < pagevec_count(&pvec); i++) { @@ -376,8 +375,8 @@ void nilfs_clear_dirty_pages(struct address_space *mapping, bool silent) pagevec_init(&pvec, 0); - while (pagevec_lookup_tag(&pvec, mapping, &index, PAGECACHE_TAG_DIRTY, - PAGEVEC_SIZE)) { + while (pagevec_lookup_tag(&pvec, mapping, &index, + PAGECACHE_TAG_DIRTY)) { for (i = 0; i < pagevec_count(&pvec); i++) { struct page *page = pvec.pages[i]; diff --git a/fs/nilfs2/segment.c b/fs/nilfs2/segment.c index 68e5769cef3b..19366ab20bea 100644 --- a/fs/nilfs2/segment.c +++ b/fs/nilfs2/segment.c @@ -712,7 +712,7 @@ static size_t nilfs_lookup_dirty_data_buffers(struct inode *inode, repeat: if (unlikely(index > last) || !pagevec_lookup_range_tag(&pvec, mapping, &index, last, - PAGECACHE_TAG_DIRTY, PAGEVEC_SIZE)) + PAGECACHE_TAG_DIRTY)) return ndirties; for (i = 0; i < pagevec_count(&pvec); i++) { @@ -755,8 +755,8 @@ static void nilfs_lookup_dirty_node_buffers(struct inode *inode, pagevec_init(&pvec, 0); - while (pagevec_lookup_tag(&pvec, mapping, &index, PAGECACHE_TAG_DIRTY, - PAGEVEC_SIZE)) { + while (pagevec_lookup_tag(&pvec, mapping, &index, + PAGECACHE_TAG_DIRTY)) { for (i = 0; i < pagevec_count(&pvec); i++) { bh = head = page_buffers(pvec.pages[i]); do { diff --git a/include/linux/pagevec.h b/include/linux/pagevec.h index 87a2dfd62f5e..4f56e0ad9d00 100644 --- a/include/linux/pagevec.h +++ b/include/linux/pagevec.h @@ -40,16 +40,14 @@ static inline unsigned pagevec_lookup(struct pagevec *pvec, unsigned pagevec_lookup_range_tag(struct pagevec *pvec, struct address_space *mapping, pgoff_t *index, pgoff_t end, - int tag, unsigned nr_pages); + int tag); unsigned pagevec_lookup_range_nr_tag(struct pagevec *pvec, struct address_space *mapping, pgoff_t *index, pgoff_t end, int tag, unsigned max_pages); static inline unsigned pagevec_lookup_tag(struct pagevec *pvec, - struct address_space *mapping, pgoff_t *index, int tag, - unsigned nr_pages) + struct address_space *mapping, pgoff_t *index, int tag) { - return pagevec_lookup_range_tag(pvec, mapping, index, (pgoff_t)-1, tag, - nr_pages); + return pagevec_lookup_range_tag(pvec, mapping, index, (pgoff_t)-1, tag); } static inline void pagevec_init(struct pagevec *pvec, int cold) diff --git a/mm/filemap.c b/mm/filemap.c index 229481d258bc..6eb4e32d99c8 100644 --- a/mm/filemap.c +++ b/mm/filemap.c @@ -424,7 +424,7 @@ static void __filemap_fdatawait_range(struct address_space *mapping, unsigned i; nr_pages = pagevec_lookup_range_tag(&pvec, mapping, &index, - end, PAGECACHE_TAG_WRITEBACK, PAGEVEC_SIZE); + end, PAGECACHE_TAG_WRITEBACK); if (!nr_pages) break; diff --git a/mm/page-writeback.c b/mm/page-writeback.c index 460fc022cbc8..231651a1486d 100644 --- a/mm/page-writeback.c +++ b/mm/page-writeback.c @@ -2197,7 +2197,7 @@ retry: int i; nr_pages = pagevec_lookup_range_tag(&pvec, mapping, &index, end, - tag, PAGEVEC_SIZE); + tag); if (nr_pages == 0) break; diff --git a/mm/swap.c b/mm/swap.c index 6c50fec2da92..4edac536fe24 100644 --- a/mm/swap.c +++ b/mm/swap.c @@ -988,10 +988,10 @@ EXPORT_SYMBOL(pagevec_lookup_range); unsigned pagevec_lookup_range_tag(struct pagevec *pvec, struct address_space *mapping, pgoff_t *index, pgoff_t end, - int tag, unsigned nr_pages) + int tag) { pvec->nr = find_get_pages_range_tag(mapping, index, end, tag, - nr_pages, pvec->pages); + PAGEVEC_SIZE, pvec->pages); return pagevec_count(pvec); } EXPORT_SYMBOL(pagevec_lookup_range_tag); -- cgit v1.2.3 From d9ed0d08b6c6a882da1d8e75bb3162fc889fd199 Mon Sep 17 00:00:00 2001 From: Mel Gorman Date: Wed, 15 Nov 2017 17:37:48 -0800 Subject: mm: only drain per-cpu pagevecs once per pagevec usage When a pagevec is initialised on the stack, it is generally used multiple times over a range of pages, looking up entries and then releasing them. On each pagevec_release, the per-cpu deferred LRU pagevecs are drained on the grounds the page being released may be on those queues and the pages may be cache hot. In many cases only the first drain is necessary as it's unlikely that the range of pages being walked is racing against LRU addition. Even if there is such a race, the impact is marginal where as constantly redraining the lru pagevecs costs. This patch ensures that pagevec is only drained once in a given lifecycle without increasing the cache footprint of the pagevec structure. Only sparsetruncate tiny is shown here as large files have many exceptional entries and calls pagecache_release less frequently. sparsetruncate (tiny) 4.14.0-rc4 4.14.0-rc4 batchshadow-v1r1 onedrain-v1r1 Min Time 141.00 ( 0.00%) 141.00 ( 0.00%) 1st-qrtle Time 142.00 ( 0.00%) 142.00 ( 0.00%) 2nd-qrtle Time 142.00 ( 0.00%) 142.00 ( 0.00%) 3rd-qrtle Time 143.00 ( 0.00%) 143.00 ( 0.00%) Max-90% Time 144.00 ( 0.00%) 144.00 ( 0.00%) Max-95% Time 146.00 ( 0.00%) 145.00 ( 0.68%) Max-99% Time 198.00 ( 0.00%) 194.00 ( 2.02%) Max Time 254.00 ( 0.00%) 208.00 ( 18.11%) Amean Time 145.12 ( 0.00%) 144.30 ( 0.56%) Stddev Time 12.74 ( 0.00%) 9.62 ( 24.49%) Coeff Time 8.78 ( 0.00%) 6.67 ( 24.06%) Best99%Amean Time 144.29 ( 0.00%) 143.82 ( 0.32%) Best95%Amean Time 142.68 ( 0.00%) 142.31 ( 0.26%) Best90%Amean Time 142.52 ( 0.00%) 142.19 ( 0.24%) Best75%Amean Time 142.26 ( 0.00%) 141.98 ( 0.20%) Best50%Amean Time 141.90 ( 0.00%) 141.71 ( 0.13%) Best25%Amean Time 141.80 ( 0.00%) 141.43 ( 0.26%) The impact on bonnie is marginal and within the noise because a significant percentage of the file being truncated has been reclaimed and consists of shadow entries which reduce the hotness of the pagevec_release path. Link: http://lkml.kernel.org/r/20171018075952.10627-5-mgorman@techsingularity.net Signed-off-by: Mel Gorman Cc: Andi Kleen Cc: Dave Chinner Cc: Dave Hansen Cc: Jan Kara Cc: Johannes Weiner Cc: Vlastimil Babka Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- include/linux/pagevec.h | 4 +++- mm/swap.c | 5 ++++- 2 files changed, 7 insertions(+), 2 deletions(-) (limited to 'include/linux/pagevec.h') diff --git a/include/linux/pagevec.h b/include/linux/pagevec.h index 4f56e0ad9d00..95c75c858d1f 100644 --- a/include/linux/pagevec.h +++ b/include/linux/pagevec.h @@ -17,7 +17,8 @@ struct address_space; struct pagevec { unsigned long nr; - unsigned long cold; + bool cold; + bool drained; struct page *pages[PAGEVEC_SIZE]; }; @@ -54,6 +55,7 @@ static inline void pagevec_init(struct pagevec *pvec, int cold) { pvec->nr = 0; pvec->cold = cold; + pvec->drained = false; } static inline void pagevec_reinit(struct pagevec *pvec) diff --git a/mm/swap.c b/mm/swap.c index 4edac536fe24..3e564a95ee73 100644 --- a/mm/swap.c +++ b/mm/swap.c @@ -833,7 +833,10 @@ EXPORT_SYMBOL(release_pages); */ void __pagevec_release(struct pagevec *pvec) { - lru_add_drain(); + if (!pvec->drained) { + lru_add_drain(); + pvec->drained = true; + } release_pages(pvec->pages, pagevec_count(pvec), pvec->cold); pagevec_reinit(pvec); } -- cgit v1.2.3 From 8667982014d6048e0b5e286b6247ff24f48d4cc6 Mon Sep 17 00:00:00 2001 From: Mel Gorman Date: Wed, 15 Nov 2017 17:37:52 -0800 Subject: mm, pagevec: remove cold parameter for pagevecs Every pagevec_init user claims the pages being released are hot even in cases where it is unlikely the pages are hot. As no one cares about the hotness of pages being released to the allocator, just ditch the parameter. No performance impact is expected as the overhead is marginal. The parameter is removed simply because it is a bit stupid to have a useless parameter copied everywhere. Link: http://lkml.kernel.org/r/20171018075952.10627-6-mgorman@techsingularity.net Signed-off-by: Mel Gorman Acked-by: Vlastimil Babka Cc: Andi Kleen Cc: Dave Chinner Cc: Dave Hansen Cc: Jan Kara Cc: Johannes Weiner Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- drivers/gpu/drm/i915/i915_gem_gtt.c | 2 +- fs/afs/write.c | 4 ++-- fs/btrfs/extent_io.c | 4 ++-- fs/buffer.c | 4 ++-- fs/cachefiles/rdwr.c | 4 ++-- fs/ceph/addr.c | 4 ++-- fs/dax.c | 2 +- fs/ext4/inode.c | 6 +++--- fs/f2fs/checkpoint.c | 2 +- fs/f2fs/data.c | 2 +- fs/f2fs/node.c | 8 ++++---- fs/fscache/page.c | 2 +- fs/gfs2/aops.c | 2 +- fs/hugetlbfs/inode.c | 2 +- fs/nilfs2/btree.c | 2 +- fs/nilfs2/page.c | 8 ++++---- fs/nilfs2/segment.c | 4 ++-- include/linux/pagevec.h | 4 +--- mm/filemap.c | 2 +- mm/mlock.c | 4 ++-- mm/page-writeback.c | 2 +- mm/shmem.c | 6 +++--- mm/swap.c | 4 ++-- mm/truncate.c | 8 ++++---- 24 files changed, 45 insertions(+), 47 deletions(-) (limited to 'include/linux/pagevec.h') diff --git a/drivers/gpu/drm/i915/i915_gem_gtt.c b/drivers/gpu/drm/i915/i915_gem_gtt.c index ad524cb0f6fc..7982ad817c11 100644 --- a/drivers/gpu/drm/i915/i915_gem_gtt.c +++ b/drivers/gpu/drm/i915/i915_gem_gtt.c @@ -1859,7 +1859,7 @@ static void i915_address_space_init(struct i915_address_space *vm, INIT_LIST_HEAD(&vm->unbound_list); list_add_tail(&vm->global_link, &dev_priv->vm_list); - pagevec_init(&vm->free_pages, false); + pagevec_init(&vm->free_pages); } static void i915_address_space_fini(struct i915_address_space *vm) diff --git a/fs/afs/write.c b/fs/afs/write.c index d62a6b54152d..11dd0526b96b 100644 --- a/fs/afs/write.c +++ b/fs/afs/write.c @@ -308,7 +308,7 @@ static void afs_kill_pages(struct afs_vnode *vnode, bool error, _enter("{%x:%u},%lx-%lx", vnode->fid.vid, vnode->fid.vnode, first, last); - pagevec_init(&pv, 0); + pagevec_init(&pv); do { _debug("kill %lx-%lx", first, last); @@ -602,7 +602,7 @@ void afs_pages_written_back(struct afs_vnode *vnode, struct afs_call *call) ASSERT(wb != NULL); - pagevec_init(&pv, 0); + pagevec_init(&pv); do { _debug("done %lx-%lx", first, last); diff --git a/fs/btrfs/extent_io.c b/fs/btrfs/extent_io.c index 93fdaac81212..16045ea86fc1 100644 --- a/fs/btrfs/extent_io.c +++ b/fs/btrfs/extent_io.c @@ -3797,7 +3797,7 @@ int btree_write_cache_pages(struct address_space *mapping, int scanned = 0; int tag; - pagevec_init(&pvec, 0); + pagevec_init(&pvec); if (wbc->range_cyclic) { index = mapping->writeback_index; /* Start from prev offset */ end = -1; @@ -3936,7 +3936,7 @@ static int extent_write_cache_pages(struct address_space *mapping, if (!igrab(inode)) return 0; - pagevec_init(&pvec, 0); + pagevec_init(&pvec); if (wbc->range_cyclic) { index = mapping->writeback_index; /* Start from prev offset */ end = -1; diff --git a/fs/buffer.c b/fs/buffer.c index 1c18a22a6013..0736a6a2e2f0 100644 --- a/fs/buffer.c +++ b/fs/buffer.c @@ -1592,7 +1592,7 @@ void clean_bdev_aliases(struct block_device *bdev, sector_t block, sector_t len) struct buffer_head *head; end = (block + len - 1) >> (PAGE_SHIFT - bd_inode->i_blkbits); - pagevec_init(&pvec, 0); + pagevec_init(&pvec); while (pagevec_lookup_range(&pvec, bd_mapping, &index, end)) { count = pagevec_count(&pvec); for (i = 0; i < count; i++) { @@ -3514,7 +3514,7 @@ page_cache_seek_hole_data(struct inode *inode, loff_t offset, loff_t length, if (length <= 0) return -ENOENT; - pagevec_init(&pvec, 0); + pagevec_init(&pvec); do { unsigned nr_pages, i; diff --git a/fs/cachefiles/rdwr.c b/fs/cachefiles/rdwr.c index 18d7aa61ef0f..23097cca2674 100644 --- a/fs/cachefiles/rdwr.c +++ b/fs/cachefiles/rdwr.c @@ -710,7 +710,7 @@ int cachefiles_read_or_alloc_pages(struct fscache_retrieval *op, /* calculate the shift required to use bmap */ shift = PAGE_SHIFT - inode->i_sb->s_blocksize_bits; - pagevec_init(&pagevec, 0); + pagevec_init(&pagevec); op->op.flags &= FSCACHE_OP_KEEP_FLAGS; op->op.flags |= FSCACHE_OP_ASYNC; @@ -844,7 +844,7 @@ int cachefiles_allocate_pages(struct fscache_retrieval *op, ret = cachefiles_has_space(cache, 0, *nr_pages); if (ret == 0) { - pagevec_init(&pagevec, 0); + pagevec_init(&pagevec); list_for_each_entry(page, pages, lru) { if (pagevec_add(&pagevec, page) == 0) diff --git a/fs/ceph/addr.c b/fs/ceph/addr.c index 26c682db94ee..dbf07051aacd 100644 --- a/fs/ceph/addr.c +++ b/fs/ceph/addr.c @@ -680,7 +680,7 @@ static void ceph_release_pages(struct page **pages, int num) struct pagevec pvec; int i; - pagevec_init(&pvec, 0); + pagevec_init(&pvec); for (i = 0; i < num; i++) { if (pagevec_add(&pvec, pages[i]) == 0) pagevec_release(&pvec); @@ -811,7 +811,7 @@ static int ceph_writepages_start(struct address_space *mapping, if (fsc->mount_options->wsize < wsize) wsize = fsc->mount_options->wsize; - pagevec_init(&pvec, 0); + pagevec_init(&pvec); start_index = wbc->range_cyclic ? mapping->writeback_index : 0; index = start_index; diff --git a/fs/dax.c b/fs/dax.c index 165fdfb6e508..3652b26a0048 100644 --- a/fs/dax.c +++ b/fs/dax.c @@ -794,7 +794,7 @@ int dax_writeback_mapping_range(struct address_space *mapping, tag_pages_for_writeback(mapping, start_index, end_index); - pagevec_init(&pvec, 0); + pagevec_init(&pvec); while (!done) { pvec.nr = find_get_entries_tag(mapping, start_index, PAGECACHE_TAG_TOWRITE, PAGEVEC_SIZE, diff --git a/fs/ext4/inode.c b/fs/ext4/inode.c index b239a41dbeeb..8d2b582fb141 100644 --- a/fs/ext4/inode.c +++ b/fs/ext4/inode.c @@ -1719,7 +1719,7 @@ static void mpage_release_unused_pages(struct mpage_da_data *mpd, ext4_es_remove_extent(inode, start, last - start + 1); } - pagevec_init(&pvec, 0); + pagevec_init(&pvec); while (index <= end) { nr_pages = pagevec_lookup_range(&pvec, mapping, &index, end); if (nr_pages == 0) @@ -2345,7 +2345,7 @@ static int mpage_map_and_submit_buffers(struct mpage_da_data *mpd) lblk = start << bpp_bits; pblock = mpd->map.m_pblk; - pagevec_init(&pvec, 0); + pagevec_init(&pvec); while (start <= end) { nr_pages = pagevec_lookup_range(&pvec, inode->i_mapping, &start, end); @@ -2616,7 +2616,7 @@ static int mpage_prepare_extent_to_map(struct mpage_da_data *mpd) else tag = PAGECACHE_TAG_DIRTY; - pagevec_init(&pvec, 0); + pagevec_init(&pvec); mpd->map.m_len = 0; mpd->next_page = index; while (index <= end) { diff --git a/fs/f2fs/checkpoint.c b/fs/f2fs/checkpoint.c index 6124f8710dc3..0bb8e2c022d3 100644 --- a/fs/f2fs/checkpoint.c +++ b/fs/f2fs/checkpoint.c @@ -314,7 +314,7 @@ long sync_meta_pages(struct f2fs_sb_info *sbi, enum page_type type, }; struct blk_plug plug; - pagevec_init(&pvec, 0); + pagevec_init(&pvec); blk_start_plug(&plug); diff --git a/fs/f2fs/data.c b/fs/f2fs/data.c index 687703755824..7b3ad5d8e2e9 100644 --- a/fs/f2fs/data.c +++ b/fs/f2fs/data.c @@ -1635,7 +1635,7 @@ static int f2fs_write_cache_pages(struct address_space *mapping, int range_whole = 0; int tag; - pagevec_init(&pvec, 0); + pagevec_init(&pvec); if (get_dirty_pages(mapping->host) <= SM_I(F2FS_M_SB(mapping))->min_hot_blocks) diff --git a/fs/f2fs/node.c b/fs/f2fs/node.c index d6e4df0bb622..b33dac9592ca 100644 --- a/fs/f2fs/node.c +++ b/fs/f2fs/node.c @@ -1282,7 +1282,7 @@ static struct page *last_fsync_dnode(struct f2fs_sb_info *sbi, nid_t ino) struct page *last_page = NULL; int nr_pages; - pagevec_init(&pvec, 0); + pagevec_init(&pvec); index = 0; while ((nr_pages = pagevec_lookup_tag(&pvec, NODE_MAPPING(sbi), &index, @@ -1436,7 +1436,7 @@ int fsync_node_pages(struct f2fs_sb_info *sbi, struct inode *inode, return PTR_ERR_OR_ZERO(last_page); } retry: - pagevec_init(&pvec, 0); + pagevec_init(&pvec); index = 0; while ((nr_pages = pagevec_lookup_tag(&pvec, NODE_MAPPING(sbi), &index, @@ -1547,7 +1547,7 @@ int sync_node_pages(struct f2fs_sb_info *sbi, struct writeback_control *wbc, int ret = 0; int nr_pages; - pagevec_init(&pvec, 0); + pagevec_init(&pvec); next_step: index = 0; @@ -1648,7 +1648,7 @@ int wait_on_node_pages_writeback(struct f2fs_sb_info *sbi, nid_t ino) int ret2, ret = 0; int nr_pages; - pagevec_init(&pvec, 0); + pagevec_init(&pvec); while ((nr_pages = pagevec_lookup_tag(&pvec, NODE_MAPPING(sbi), &index, PAGECACHE_TAG_WRITEBACK))) { diff --git a/fs/fscache/page.c b/fs/fscache/page.c index 0ad3fd3ad0b4..961029e04027 100644 --- a/fs/fscache/page.c +++ b/fs/fscache/page.c @@ -1175,7 +1175,7 @@ void __fscache_uncache_all_inode_pages(struct fscache_cookie *cookie, return; } - pagevec_init(&pvec, 0); + pagevec_init(&pvec); next = 0; do { if (!pagevec_lookup(&pvec, mapping, &next)) diff --git a/fs/gfs2/aops.c b/fs/gfs2/aops.c index 3fea3d7780b0..1daf15a1f00c 100644 --- a/fs/gfs2/aops.c +++ b/fs/gfs2/aops.c @@ -371,7 +371,7 @@ static int gfs2_write_cache_jdata(struct address_space *mapping, int range_whole = 0; int tag; - pagevec_init(&pvec, 0); + pagevec_init(&pvec); if (wbc->range_cyclic) { writeback_index = mapping->writeback_index; /* prev offset */ index = writeback_index; diff --git a/fs/hugetlbfs/inode.c b/fs/hugetlbfs/inode.c index 6adb17bb1a38..1e76730aac0d 100644 --- a/fs/hugetlbfs/inode.c +++ b/fs/hugetlbfs/inode.c @@ -407,7 +407,7 @@ static void remove_inode_hugepages(struct inode *inode, loff_t lstart, memset(&pseudo_vma, 0, sizeof(struct vm_area_struct)); pseudo_vma.vm_flags = (VM_HUGETLB | VM_MAYSHARE | VM_SHARED); - pagevec_init(&pvec, 0); + pagevec_init(&pvec); next = start; while (next < end) { /* diff --git a/fs/nilfs2/btree.c b/fs/nilfs2/btree.c index 35989c7bb065..16a7a67a11c9 100644 --- a/fs/nilfs2/btree.c +++ b/fs/nilfs2/btree.c @@ -2156,7 +2156,7 @@ static void nilfs_btree_lookup_dirty_buffers(struct nilfs_bmap *btree, level++) INIT_LIST_HEAD(&lists[level]); - pagevec_init(&pvec, 0); + pagevec_init(&pvec); while (pagevec_lookup_tag(&pvec, btcache, &index, PAGECACHE_TAG_DIRTY)) { diff --git a/fs/nilfs2/page.c b/fs/nilfs2/page.c index 1c16726915c1..68241512d7c1 100644 --- a/fs/nilfs2/page.c +++ b/fs/nilfs2/page.c @@ -255,7 +255,7 @@ int nilfs_copy_dirty_pages(struct address_space *dmap, pgoff_t index = 0; int err = 0; - pagevec_init(&pvec, 0); + pagevec_init(&pvec); repeat: if (!pagevec_lookup_tag(&pvec, smap, &index, PAGECACHE_TAG_DIRTY)) return 0; @@ -309,7 +309,7 @@ void nilfs_copy_back_pages(struct address_space *dmap, pgoff_t index = 0; int err; - pagevec_init(&pvec, 0); + pagevec_init(&pvec); repeat: n = pagevec_lookup(&pvec, smap, &index); if (!n) @@ -373,7 +373,7 @@ void nilfs_clear_dirty_pages(struct address_space *mapping, bool silent) unsigned int i; pgoff_t index = 0; - pagevec_init(&pvec, 0); + pagevec_init(&pvec); while (pagevec_lookup_tag(&pvec, mapping, &index, PAGECACHE_TAG_DIRTY)) { @@ -518,7 +518,7 @@ unsigned long nilfs_find_uncommitted_extent(struct inode *inode, index = start_blk >> (PAGE_SHIFT - inode->i_blkbits); nblocks_in_page = 1U << (PAGE_SHIFT - inode->i_blkbits); - pagevec_init(&pvec, 0); + pagevec_init(&pvec); repeat: pvec.nr = find_get_pages_contig(inode->i_mapping, index, PAGEVEC_SIZE, diff --git a/fs/nilfs2/segment.c b/fs/nilfs2/segment.c index 19366ab20bea..f65392fecb5c 100644 --- a/fs/nilfs2/segment.c +++ b/fs/nilfs2/segment.c @@ -708,7 +708,7 @@ static size_t nilfs_lookup_dirty_data_buffers(struct inode *inode, index = start >> PAGE_SHIFT; last = end >> PAGE_SHIFT; } - pagevec_init(&pvec, 0); + pagevec_init(&pvec); repeat: if (unlikely(index > last) || !pagevec_lookup_range_tag(&pvec, mapping, &index, last, @@ -753,7 +753,7 @@ static void nilfs_lookup_dirty_node_buffers(struct inode *inode, unsigned int i; pgoff_t index = 0; - pagevec_init(&pvec, 0); + pagevec_init(&pvec); while (pagevec_lookup_tag(&pvec, mapping, &index, PAGECACHE_TAG_DIRTY)) { diff --git a/include/linux/pagevec.h b/include/linux/pagevec.h index 95c75c858d1f..eebefd209424 100644 --- a/include/linux/pagevec.h +++ b/include/linux/pagevec.h @@ -17,7 +17,6 @@ struct address_space; struct pagevec { unsigned long nr; - bool cold; bool drained; struct page *pages[PAGEVEC_SIZE]; }; @@ -51,10 +50,9 @@ static inline unsigned pagevec_lookup_tag(struct pagevec *pvec, return pagevec_lookup_range_tag(pvec, mapping, index, (pgoff_t)-1, tag); } -static inline void pagevec_init(struct pagevec *pvec, int cold) +static inline void pagevec_init(struct pagevec *pvec) { pvec->nr = 0; - pvec->cold = cold; pvec->drained = false; } diff --git a/mm/filemap.c b/mm/filemap.c index 155370fc87f2..90a9f261f85f 100644 --- a/mm/filemap.c +++ b/mm/filemap.c @@ -519,7 +519,7 @@ static void __filemap_fdatawait_range(struct address_space *mapping, if (end_byte < start_byte) return; - pagevec_init(&pvec, 0); + pagevec_init(&pvec); while (index <= end) { unsigned i; diff --git a/mm/mlock.c b/mm/mlock.c index 46af369c13e5..ed37cb208d19 100644 --- a/mm/mlock.c +++ b/mm/mlock.c @@ -289,7 +289,7 @@ static void __munlock_pagevec(struct pagevec *pvec, struct zone *zone) struct pagevec pvec_putback; int pgrescued = 0; - pagevec_init(&pvec_putback, 0); + pagevec_init(&pvec_putback); /* Phase 1: page isolation */ spin_lock_irq(zone_lru_lock(zone)); @@ -448,7 +448,7 @@ void munlock_vma_pages_range(struct vm_area_struct *vma, struct pagevec pvec; struct zone *zone; - pagevec_init(&pvec, 0); + pagevec_init(&pvec); /* * Although FOLL_DUMP is intended for get_dump_page(), * it just so happens that its special treatment of the diff --git a/mm/page-writeback.c b/mm/page-writeback.c index 436714917e03..05313f402ba8 100644 --- a/mm/page-writeback.c +++ b/mm/page-writeback.c @@ -2168,7 +2168,7 @@ int write_cache_pages(struct address_space *mapping, int range_whole = 0; int tag; - pagevec_init(&pvec, 0); + pagevec_init(&pvec); if (wbc->range_cyclic) { writeback_index = mapping->writeback_index; /* prev offset */ index = writeback_index; diff --git a/mm/shmem.c b/mm/shmem.c index a72f68aee6a4..7ea8b276ba8b 100644 --- a/mm/shmem.c +++ b/mm/shmem.c @@ -747,7 +747,7 @@ void shmem_unlock_mapping(struct address_space *mapping) pgoff_t indices[PAGEVEC_SIZE]; pgoff_t index = 0; - pagevec_init(&pvec, 0); + pagevec_init(&pvec); /* * Minor point, but we might as well stop if someone else SHM_LOCKs it. */ @@ -790,7 +790,7 @@ static void shmem_undo_range(struct inode *inode, loff_t lstart, loff_t lend, if (lend == -1) end = -1; /* unsigned, so actually very big */ - pagevec_init(&pvec, 0); + pagevec_init(&pvec); index = start; while (index < end) { pvec.nr = find_get_entries(mapping, index, @@ -2528,7 +2528,7 @@ static pgoff_t shmem_seek_hole_data(struct address_space *mapping, bool done = false; int i; - pagevec_init(&pvec, 0); + pagevec_init(&pvec); pvec.nr = 1; /* start small: we may be there already */ while (!done) { pvec.nr = find_get_entries(mapping, index, diff --git a/mm/swap.c b/mm/swap.c index 3e564a95ee73..88a19b6cdf7c 100644 --- a/mm/swap.c +++ b/mm/swap.c @@ -210,7 +210,7 @@ static void pagevec_lru_move_fn(struct pagevec *pvec, } if (pgdat) spin_unlock_irqrestore(&pgdat->lru_lock, flags); - release_pages(pvec->pages, pvec->nr, pvec->cold); + release_pages(pvec->pages, pvec->nr, 0); pagevec_reinit(pvec); } @@ -837,7 +837,7 @@ void __pagevec_release(struct pagevec *pvec) lru_add_drain(); pvec->drained = true; } - release_pages(pvec->pages, pagevec_count(pvec), pvec->cold); + release_pages(pvec->pages, pagevec_count(pvec), 0); pagevec_reinit(pvec); } EXPORT_SYMBOL(__pagevec_release); diff --git a/mm/truncate.c b/mm/truncate.c index c30e8fa3d063..e4b4cf0f4070 100644 --- a/mm/truncate.c +++ b/mm/truncate.c @@ -330,7 +330,7 @@ void truncate_inode_pages_range(struct address_space *mapping, else end = (lend + 1) >> PAGE_SHIFT; - pagevec_init(&pvec, 0); + pagevec_init(&pvec); index = start; while (index < end && pagevec_lookup_entries(&pvec, mapping, index, min(end - index, (pgoff_t)PAGEVEC_SIZE), @@ -342,7 +342,7 @@ void truncate_inode_pages_range(struct address_space *mapping, */ struct pagevec locked_pvec; - pagevec_init(&locked_pvec, 0); + pagevec_init(&locked_pvec); for (i = 0; i < pagevec_count(&pvec); i++) { struct page *page = pvec.pages[i]; @@ -553,7 +553,7 @@ unsigned long invalidate_mapping_pages(struct address_space *mapping, unsigned long count = 0; int i; - pagevec_init(&pvec, 0); + pagevec_init(&pvec); while (index <= end && pagevec_lookup_entries(&pvec, mapping, index, min(end - index, (pgoff_t)PAGEVEC_SIZE - 1) + 1, indices)) { @@ -683,7 +683,7 @@ int invalidate_inode_pages2_range(struct address_space *mapping, if (mapping->nrpages == 0 && mapping->nrexceptional == 0) goto out; - pagevec_init(&pvec, 0); + pagevec_init(&pvec); index = start; while (index <= end && pagevec_lookup_entries(&pvec, mapping, index, min(end - index, (pgoff_t)PAGEVEC_SIZE - 1) + 1, -- cgit v1.2.3 From 7f0b5fb953e750a7410cc96c67a656d79db48bcb Mon Sep 17 00:00:00 2001 From: Mel Gorman Date: Wed, 15 Nov 2017 17:38:10 -0800 Subject: mm, pagevec: rename pagevec drained field According to Vlastimil Babka, the drained field in pagevec is potentially misleading because it might be interpreted as draining this pagevec instead of the percpu lru pagevecs. Rename the field for clarity. Link: http://lkml.kernel.org/r/20171019093346.ylahzdpzmoriyf4v@techsingularity.net Signed-off-by: Mel Gorman Suggested-by: Vlastimil Babka Cc: Andi Kleen Cc: Dave Chinner Cc: Dave Hansen Cc: Jan Kara Cc: Johannes Weiner Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- include/linux/pagevec.h | 4 ++-- mm/swap.c | 4 ++-- 2 files changed, 4 insertions(+), 4 deletions(-) (limited to 'include/linux/pagevec.h') diff --git a/include/linux/pagevec.h b/include/linux/pagevec.h index eebefd209424..5fb6580f7f23 100644 --- a/include/linux/pagevec.h +++ b/include/linux/pagevec.h @@ -17,7 +17,7 @@ struct address_space; struct pagevec { unsigned long nr; - bool drained; + bool percpu_pvec_drained; struct page *pages[PAGEVEC_SIZE]; }; @@ -53,7 +53,7 @@ static inline unsigned pagevec_lookup_tag(struct pagevec *pvec, static inline void pagevec_init(struct pagevec *pvec) { pvec->nr = 0; - pvec->drained = false; + pvec->percpu_pvec_drained = false; } static inline void pagevec_reinit(struct pagevec *pvec) diff --git a/mm/swap.c b/mm/swap.c index b480279c760c..38e1b6374a97 100644 --- a/mm/swap.c +++ b/mm/swap.c @@ -833,9 +833,9 @@ EXPORT_SYMBOL(release_pages); */ void __pagevec_release(struct pagevec *pvec) { - if (!pvec->drained) { + if (!pvec->percpu_pvec_drained) { lru_add_drain(); - pvec->drained = true; + pvec->percpu_pvec_drained = true; } release_pages(pvec->pages, pagevec_count(pvec)); pagevec_reinit(pvec); -- cgit v1.2.3