diff options
author | Mike Galbraith <mgalbraith@suse.de> | 2012-07-11 22:05:20 +0000 |
---|---|---|
committer | Steven Rostedt <rostedt@goodmis.org> | 2012-07-12 11:26:06 -0400 |
commit | 29d8f5e726bd2b3e7ae8aa9b322874960a8401d7 (patch) | |
tree | 837c28df1e022a79b66c21053770e7ab8b5e24e0 | |
parent | 6746255b09bc655c9eff80270ad52dd6b7d70faf (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 5c93ffce6e70..ddbd223ddb27 100644 --- a/fs/jbd/checkpoint.c +++ b/fs/jbd/checkpoint.c @@ -129,6 +129,8 @@ 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); /* |