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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 <khlebnikov@yandex-team.ru>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Konstantin Khebnikov 2015-02-11 15:26:55 -08:00 committed by Linus Torvalds
parent b30fe6c7ce
commit 8d38633c3b
2 changed files with 5 additions and 2 deletions
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2
fs/btrfs/extent_io.c
View File

@ -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++;
}

5
mm/page-writeback.c
View File

@ -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);