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Subject[PATCH 3.15 101/139] f2fs: submit bio at the reclaim path
Date
3.15-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Jaegeuk Kim <jaegeuk.kim@samsung.com>

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@gmx.de>
Signed-off-by: Jaegeuk Kim <jaegeuk.kim@samsung.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

---
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:



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