diff options
| author | Mike Galbraith <mgalbraith@suse.de> | 2012-07-11 22:05:20 +0000 |
|---|---|---|
| committer | Gary S. Robertson <gary.robertson@linaro.org> | 2014-05-07 08:56:08 -0500 |
| commit | b36f30acaa2f2d0bb8fec7fffafdde324155ddbb (patch) | |
| tree | 9860cc5c4ccb0ee695fdca53362caabecdbac029 /fs | |
| parent | ea0d3d937557c9e58c6cfe6a2b286bc2ae67093f (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>
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 08c03044abdd..95debd71e5fa 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); /* |