Commit c8236db9 authored Jul 05, 2009 by Josef Bacik Committed by Linus Torvalds Jul 06, 2009

mm: mark page accessed before we write_end()



In testing a backport of the write_begin/write_end AOPs, a 10% re-read
regression was noticed when running iozone.  This regression was
introduced because the old AOPs would always do a mark_page_accessed(page)
after the commit_write, but when the new AOPs where introduced, the only
place this was kept was in pagecache_write_end().

This patch does the same thing in the generic case as what is done in
pagecache_write_end(), which is just to mark the page accessed before we
do write_end().

Signed-off-by: Josef Bacik <jbacik@redhat.com>
Acked-by: Nick Piggin <npiggin@suse.de>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

parent a65e7bfc

mm/filemap.c

+1 −0

Original line number	Diff line number	Diff line
		@@ -2272,6 +2272,7 @@ static ssize_t generic_perform_write(struct file *file,
		pagefault_enable();
		flush_dcache_page(page);

		mark_page_accessed(page);
		status = a_ops->write_end(file, mapping, pos, bytes, copied,
		page, fsdata);
		if (unlikely(status < 0))