This is a note to let you know that I've just added the patch titled
f2fs: submit bio at the reclaim path
to the 3.15-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
f2fs-submit-bio-at-the-reclaim-path.patch
and it can be found in the queue-3.15 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From 2aea39eca6b68d6ae7eb545332df0695f56a3d3f Mon Sep 17 00:00:00 2001
From: Jaegeuk Kim <jaegeuk.kim@xxxxxxxxxxx>
Date: Thu, 24 Apr 2014 09:49:52 +0900
Subject: f2fs: submit bio at the reclaim path
From: Jaegeuk Kim <jaegeuk.kim@xxxxxxxxxxx>
commit 2aea39eca6b68d6ae7eb545332df0695f56a3d3f upstream.
If f2fs_write_data_page is called through the reclaim path, we should submit
the bio right away.
This patch resolves the following issue that Marc Dietrich reported.
"It took me a while to bisect a problem which causes my ARM (tegra2) netbook to
frequently stall for 5-10 seconds when I enable EXA acceleration (opentegra
experimental ddx)."
And this patch fixes that.
Reported-by: Marc Dietrich <marvin24@xxxxxx>
Signed-off-by: Jaegeuk Kim <jaegeuk.kim@xxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
fs/f2fs/data.c | 2 ++
1 file changed, 2 insertions(+)
--- a/fs/f2fs/data.c
+++ b/fs/f2fs/data.c
@@ -835,6 +835,8 @@ out:
unlock_page(page);
if (need_balance_fs)
f2fs_balance_fs(sbi);
+ if (wbc->for_reclaim)
+ f2fs_submit_merged_bio(sbi, DATA, WRITE);
return 0;
redirty_out:
Patches currently in stable-queue which might be from jaegeuk.kim@xxxxxxxxxxx are
queue-3.15/f2fs-submit-bio-at-the-reclaim-path.patch
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