The patch titled
cfq: fix IOPRIO_CLASS_IDLE accounting
has been added to the -mm tree. Its filename is
cfq-fix-ioprio_class_idle-accounting.patch
*** Remember to use Documentation/SubmitChecklist when testing your code ***
See http://www.zip.com.au/~akpm/linux/patches/stuff/added-to-mm.txt to find
out what to do about this
------------------------------------------------------
Subject: cfq: fix IOPRIO_CLASS_IDLE accounting
From: Oleg Nesterov <oleg@xxxxxxxxxx>
Spotted by Nick <gentuu@xxxxxxxxx>, hopefully can explain the second trace
in http://bugzilla.kernel.org/show_bug.cgi?id=9180.
If ->async_idle_cfqq != NULL cfq_put_async_queues() puts it IOPRIO_BE_NR
times in a loop. Fix this.
Signed-off-by: Oleg Nesterov <oleg@xxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
block/cfq-iosched.c | 5 +++--
1 file changed, 3 insertions(+), 2 deletions(-)
diff -puN block/cfq-iosched.c~cfq-fix-ioprio_class_idle-accounting block/cfq-iosched.c
--- a/block/cfq-iosched.c~cfq-fix-ioprio_class_idle-accounting
+++ a/block/cfq-iosched.c
@@ -2068,9 +2068,10 @@ static void cfq_put_async_queues(struct
cfq_put_queue(cfqd->async_cfqq[0][i]);
if (cfqd->async_cfqq[1][i])
cfq_put_queue(cfqd->async_cfqq[1][i]);
- if (cfqd->async_idle_cfqq)
- cfq_put_queue(cfqd->async_idle_cfqq);
}
+
+ if (cfqd->async_idle_cfqq)
+ cfq_put_queue(cfqd->async_idle_cfqq);
}
static void cfq_exit_queue(elevator_t *e)
_
Patches currently in -mm which might be from oleg@xxxxxxxxxx are
origin.patch
cfq-fix-ioprio_class_idle-accounting.patch
add-task_wakekill.patch
-
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