diff options
| author | Mike Galbraith <mgalbraith@suse.de> | 2012-07-11 22:05:20 +0000 |
|---|---|---|
| committer | Steven Rostedt <rostedt@rostedt.homelinux.com> | 2013-04-23 11:35:14 -0400 |
| commit | 435edf1dc37109a6b7456cbc08bb5772f597ef1a (patch) | |
| tree | 767795cf5e50129b09dd786524ca497186ecbd03 | |
| parent | d4e30cec67efbc47d1fb63d5c5ac7c35f25fd6e6 (diff) | |
fs, jbd: pull your plug when waiting for space
With an -rt kernel, and a heavy sync IO load, tasks can jam
up on journal locks without unplugging, which can lead to
terminal IO starvation. Unplug and schedule when waiting for space.
Signed-off-by: Mike Galbraith <mgalbraith@suse.de>
Cc: Steven Rostedt <rostedt@goodmis.org>
Cc: Theodore Tso <tytso@mit.edu>
Link: http://lkml.kernel.org/r/1341812414.7370.73.camel@marge.simpson.net
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
| -rw-r--r-- | fs/jbd/checkpoint.c | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/fs/jbd/checkpoint.c b/fs/jbd/checkpoint.c index e4b87bc1fa56..e24b2d58961d 100644 --- a/fs/jbd/checkpoint.c +++ b/fs/jbd/checkpoint.c @@ -123,6 +123,8 @@ void __log_wait_for_space(journal_t *journal) if (journal->j_flags & JFS_ABORT) return; spin_unlock(&journal->j_state_lock); + if (current->plug) + io_schedule(); mutex_lock(&journal->j_checkpoint_mutex); /* |