[PATCH RT 06/12] fs, jbd: pull your plug when waiting for space
From: Steven Rostedt <rostedt@goodmis.org>
Date: 2012-07-17 15:33:27
Also in:
lkml
Subsystem:
filesystems (vfs and infrastructure), the rest · Maintainers:
Alexander Viro, Christian Brauner, Linus Torvalds
From: Mike Galbraith <redacted> 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 <redacted> 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 <redacted> Signed-off-by: Steven Rostedt <rostedt@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 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