From: Konstantin Khebnikov Date: Wed, 11 Feb 2015 23:26:55 +0000 (-0800) Subject: page_writeback: put account_page_redirty() after set_page_dirty() X-Git-Url: https://git.karo-electronics.de/?a=commitdiff_plain;h=8d38633c3b4093aca7524945f1e9249d7d3a44da;p=linux-beck.git 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 --- diff --git a/fs/btrfs/extent_io.c b/fs/btrfs/extent_io.c index 790dbae3343c..c73df6a7c9b6 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 fb71e9deca85..6a73e47e81c6 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);