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| author | Matthew Wilcox <willy@infradead.org> | 2017-12-04 18:46:23 +0300 |
|---|---|---|
| committer | Matthew Wilcox <willy@infradead.org> | 2018-10-21 17:46:42 +0300 |
| commit | 04edf02cdd37a7e2e23ce8de77cb06d22ef2f503 (patch) | |
| tree | 14c8a6aa06d021b35252164f5ec99f1adc8f4569 /fs/fs-writeback.c | |
| parent | ec82e1c1c89ce02d7703b841e6ee7d429feed609 (diff) | |
| download | linux-04edf02cdd37a7e2e23ce8de77cb06d22ef2f503.tar.xz | |
fs: Convert writeback to XArray
A couple of short loops.
Signed-off-by: Matthew Wilcox <willy@infradead.org>
Diffstat (limited to 'fs/fs-writeback.c')
| -rw-r--r-- | fs/fs-writeback.c | 25 |
1 files changed, 9 insertions, 16 deletions
diff --git a/fs/fs-writeback.c b/fs/fs-writeback.c index 471d863958bc..b40168fcc94a 100644 --- a/fs/fs-writeback.c +++ b/fs/fs-writeback.c @@ -339,9 +339,9 @@ static void inode_switch_wbs_work_fn(struct work_struct *work) struct address_space *mapping = inode->i_mapping; struct bdi_writeback *old_wb = inode->i_wb; struct bdi_writeback *new_wb = isw->new_wb; - struct radix_tree_iter iter; + XA_STATE(xas, &mapping->i_pages, 0); + struct page *page; bool switched = false; - void **slot; /* * By the time control reaches here, RCU grace period has passed @@ -375,25 +375,18 @@ static void inode_switch_wbs_work_fn(struct work_struct *work) * to possibly dirty pages while PAGECACHE_TAG_WRITEBACK points to * pages actually under writeback. */ - radix_tree_for_each_tagged(slot, &mapping->i_pages, &iter, 0, - PAGECACHE_TAG_DIRTY) { - struct page *page = radix_tree_deref_slot_protected(slot, - &mapping->i_pages.xa_lock); - if (likely(page) && PageDirty(page)) { + xas_for_each_marked(&xas, page, ULONG_MAX, PAGECACHE_TAG_DIRTY) { + if (PageDirty(page)) { dec_wb_stat(old_wb, WB_RECLAIMABLE); inc_wb_stat(new_wb, WB_RECLAIMABLE); } } - radix_tree_for_each_tagged(slot, &mapping->i_pages, &iter, 0, - PAGECACHE_TAG_WRITEBACK) { - struct page *page = radix_tree_deref_slot_protected(slot, - &mapping->i_pages.xa_lock); - if (likely(page)) { - WARN_ON_ONCE(!PageWriteback(page)); - dec_wb_stat(old_wb, WB_WRITEBACK); - inc_wb_stat(new_wb, WB_WRITEBACK); - } + xas_set(&xas, 0); + xas_for_each_marked(&xas, page, ULONG_MAX, PAGECACHE_TAG_WRITEBACK) { + WARN_ON_ONCE(!PageWriteback(page)); + dec_wb_stat(old_wb, WB_WRITEBACK); + inc_wb_stat(new_wb, WB_WRITEBACK); } wb_get(new_wb); |