diff options
| author | Mike Snitzer <snitzer@kernel.org> | 2023-02-16 12:10:05 -0500 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2023-03-10 09:34:21 +0100 |
| commit | 2b3c953226cbad48990a98cce02da236ea07662c (patch) | |
| tree | d6635ec5a141cbd2bbf750f269cd707d64c2dfb0 /drivers/md | |
| parent | 7f093695b49a0e46d2f1ad0c641dd04f8d20acd9 (diff) | |
| download | linux-2b3c953226cbad48990a98cce02da236ea07662c.tar.gz | |
dm: add cond_resched() to dm_wq_requeue_work()
commit f77692d65d54665d81815349cc727baa85e8b71d upstream.
Otherwise the while() loop in dm_wq_requeue_work() can result in a
"dead loop" on systems that have preemption disabled. This is
particularly problematic on single cpu systems.
Fixes: 8b211aaccb915 ("dm: add two stage requeue mechanism")
Cc: stable@vger.kernel.org
Signed-off-by: Mike Snitzer <snitzer@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/md')
| -rw-r--r-- | drivers/md/dm.c | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/drivers/md/dm.c b/drivers/md/dm.c index 212441671554..d727ed9cd623 100644 --- a/drivers/md/dm.c +++ b/drivers/md/dm.c @@ -1020,6 +1020,7 @@ static void dm_wq_requeue_work(struct work_struct *work) io->next = NULL; __dm_io_complete(io, false); io = next; + cond_resched(); } } |