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| author | Gao Xiang <gaoxiang25@huawei.com> | 2019-11-21 16:59:54 +0300 |
|---|---|---|
| committer | Gao Xiang <gaoxiang25@huawei.com> | 2019-11-24 05:57:48 +0300 |
| commit | 5ddcee1f3a1ccaccb31bc17080f75a0bb13b4906 (patch) | |
| tree | 2588e73eefe6da892ba830d3a60a7c0afaa158cf /fs/erofs/zdata.c | |
| parent | bda17a4577da729d17b8f87bf3279b9db201d8ca (diff) | |
| download | linux-5ddcee1f3a1ccaccb31bc17080f75a0bb13b4906.tar.xz | |
erofs: get rid of __stagingpage_alloc helper
Now open code is much cleaner due to iterative development.
Link: https://lore.kernel.org/r/20191124025217.12345-1-hsiangkao@aol.com
Reviewed-by: Chao Yu <yuchao0@huawei.com>
Signed-off-by: Gao Xiang <gaoxiang25@huawei.com>
Diffstat (limited to 'fs/erofs/zdata.c')
| -rw-r--r-- | fs/erofs/zdata.c | 37 |
1 files changed, 17 insertions, 20 deletions
diff --git a/fs/erofs/zdata.c b/fs/erofs/zdata.c index 93f8bc1a64f6..1c582a3a40a3 100644 --- a/fs/erofs/zdata.c +++ b/fs/erofs/zdata.c @@ -546,15 +546,6 @@ static bool z_erofs_collector_end(struct z_erofs_collector *clt) return true; } -static inline struct page *__stagingpage_alloc(struct list_head *pagepool, - gfp_t gfp) -{ - struct page *page = erofs_allocpage(pagepool, gfp, true); - - page->mapping = Z_EROFS_MAPPING_STAGING; - return page; -} - static bool should_alloc_managed_pages(struct z_erofs_decompress_frontend *fe, unsigned int cachestrategy, erofs_off_t la) @@ -661,8 +652,9 @@ retry: /* should allocate an additional staging page for pagevec */ if (err == -EAGAIN) { struct page *const newpage = - __stagingpage_alloc(pagepool, GFP_NOFS); + erofs_allocpage(pagepool, GFP_NOFS | __GFP_NOFAIL); + newpage->mapping = Z_EROFS_MAPPING_STAGING; err = z_erofs_attach_page(clt, newpage, Z_EROFS_PAGE_TYPE_EXCLUSIVE); if (!err) @@ -1079,19 +1071,24 @@ repeat: unlock_page(page); put_page(page); out_allocpage: - page = __stagingpage_alloc(pagepool, gfp); - if (oldpage != cmpxchg(&pcl->compressed_pages[nr], oldpage, page)) { - list_add(&page->lru, pagepool); - cpu_relax(); - goto repeat; - } - if (!tocache) - goto out; - if (add_to_page_cache_lru(page, mc, index + nr, gfp)) { + page = erofs_allocpage(pagepool, gfp | __GFP_NOFAIL); + if (!tocache || add_to_page_cache_lru(page, mc, index + nr, gfp)) { + /* non-LRU / non-movable temporary page is needed */ page->mapping = Z_EROFS_MAPPING_STAGING; - goto out; + tocache = false; } + if (oldpage != cmpxchg(&pcl->compressed_pages[nr], oldpage, page)) { + if (tocache) { + /* since it added to managed cache successfully */ + unlock_page(page); + put_page(page); + } else { + list_add(&page->lru, pagepool); + } + cond_resched(); + goto repeat; + } set_page_private(page, (unsigned long)pcl); SetPagePrivate(page); out: /* the only exit (for tracing and debugging) */ |