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| author | Mike Galbraith <mgalbraith@suse.de> | 2012-07-11 22:05:20 (GMT) |
|---|---|---|
| committer | Scott Wood <scottwood@freescale.com> | 2014-04-10 00:19:38 (GMT) |
| commit | 36264b24dae7b283a7a67718a2112efc4138f853 (patch) | |
| tree | 6cdf5041175ab66b334549cd4be27b3842285cf8 /fs | |
| parent | 3db80947b547c8f76582f02811349f7573dee831 (diff) | |
| download | linux-fsl-qoriq-36264b24dae7b283a7a67718a2112efc4138f853.tar.xz | |
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>
Diffstat (limited to 'fs')
| -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 08c0304..95debd7 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); /* |