From: Mike Galbraith <[email protected]> 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 <[email protected]> Cc: Steven Rostedt <[email protected]> Cc: Theodore Tso <[email protected]> Link: http://lkml.kernel.org/r/[email protected] Signed-off-by: Thomas Gleixner <[email protected]> Signed-off-by: Steven Rostedt <[email protected]> --- fs/jbd/checkpoint.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/fs/jbd/checkpoint.c b/fs/jbd/checkpoint.c index 05f0754..d8efcbc 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); /* -- 1.7.10.4 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
