Theodore Ts'o c35a56a090 jbd2: Improve scalability by not taking j_state_lock in jbd2_journal_stop() ...

One of the most contended locks in the jbd2 layer is j_state_lock when
running dbench.  This is especially true if using the real-time kernel
with its "sleeping spinlocks" patch that replaces spinlocks with
priority inheriting mutexes --- but it also shows up on large SMP
benchmarks.

Thanks to John Stultz for pointing this out.

Reviewed by Mingming Cao and Jan Kara.

Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>

2010-05-16 05:00:00 -04:00

..

checkpoint.c

ext4: Add new tracepoint for jbd2_cleanup_journal_tail

2009-12-23 07:45:44 -05:00

commit.c

jbd2: clean up an assertion in jbd2_journal_commit_transaction()

2010-02-24 12:11:20 -05:00

journal.c

jbd2: don't use __GFP_NOFAIL in journal_init_common()

2009-12-23 08:05:15 -05:00

Kconfig

Revert "task_struct: make journal_info conditional"

2009-12-17 13:23:24 -08:00

Makefile

…

recovery.c

include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h

2010-03-30 22:02:32 +09:00

revoke.c

…

transaction.c

jbd2: Improve scalability by not taking j_state_lock in jbd2_journal_stop()

2010-05-16 05:00:00 -04:00