f2fs: submit bio at the reclaim path

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>

diff --git a/fs/f2fs/data.c b/fs/f2fs/data.c
index 45abd60e2bff54323139b037ed1bccd1e534e96e..bc077f3c8868a4c5969861f4d8291e70cc8be4b8 100644 (file)
--- 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: