From 8d38633c3b4093aca7524945f1e9249d7d3a44da Mon Sep 17 00:00:00 2001 From: Konstantin Khebnikov Date: Wed, 11 Feb 2015 15:26:55 -0800 Subject: [PATCH] page_writeback: put account_page_redirty() after set_page_dirty() Helper account_page_redirty() fixes dirty pages counter for redirtied pages. This patch puts it after dirtying and prevents temporary underflows of dirtied pages counters on zone/bdi and current->nr_dirtied. Signed-off-by: Konstantin Khebnikov Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- fs/btrfs/extent_io.c | 2 +- mm/page-writeback.c | 5 ++++- 2 files changed, 5 insertions(+), 2 deletions(-) diff --git a/fs/btrfs/extent_io.c b/fs/btrfs/extent_io.c index 790dbae..c73df6a 100644 --- a/fs/btrfs/extent_io.c +++ b/fs/btrfs/extent_io.c @@ -1407,8 +1407,8 @@ int extent_range_redirty_for_io(struct inode *inode, u64 start, u64 end) while (index <= end_index) { page = find_get_page(inode->i_mapping, index); BUG_ON(!page); /* Pages should be in the extent_io_tree */ - account_page_redirty(page); __set_page_dirty_nobuffers(page); + account_page_redirty(page); page_cache_release(page); index++; } diff --git a/mm/page-writeback.c b/mm/page-writeback.c index fb71e9d..6a73e47 100644 --- a/mm/page-writeback.c +++ b/mm/page-writeback.c @@ -2168,9 +2168,12 @@ EXPORT_SYMBOL(account_page_redirty); */ int redirty_page_for_writepage(struct writeback_control *wbc, struct page *page) { + int ret; + wbc->pages_skipped++; + ret = __set_page_dirty_nobuffers(page); account_page_redirty(page); - return __set_page_dirty_nobuffers(page); + return ret; } EXPORT_SYMBOL(redirty_page_for_writepage); -- 2.7.4