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Message-ID: <20090702130500.GF16713@dhcp231-156.rdu.redhat.com> Date: Thu, 2 Jul 2009 09:05:00 -0400 From: Josef Bacik <josef@...hat.com> To: linux-kernel@...r.kernel.org Cc: npiggin@...e.de, stable@...nel.org, linux-fsdevel@...r.kernel.org Subject: [PATCH] mm: mark page accessed before we write_end Hello, 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(). Thank you, Signed-off-by: Josef Bacik <jbacik@...hat.com> --- mm/filemap.c | 1 + 1 files changed, 1 insertions(+), 0 deletions(-) diff --git a/mm/filemap.c b/mm/filemap.c index 2239671..ccea3b6 100644 --- a/mm/filemap.c +++ b/mm/filemap.c @@ -2272,6 +2272,7 @@ again: 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)) -- 1.5.4.3 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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