From: Mike Galbraith <mgalbra...@suse.de> 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 <mgalbra...@suse.de> Cc: Steven Rostedt <rost...@goodmis.org> Cc: Theodore Tso <ty...@mit.edu> Link: http://lkml.kernel.org/r/1341812414.7370.73.ca...@marge.simpson.net Signed-off-by: Thomas Gleixner <t...@linutronix.de> Signed-off-by: Steven Rostedt <rost...@goodmis.org> --- fs/jbd/checkpoint.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/fs/jbd/checkpoint.c b/fs/jbd/checkpoint.c index e4b87bc..e24b2d5 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); /* -- 1.7.10.4 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
