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| author | Theodore Ts'o <tytso@mit.edu> | 2010-05-16 11:00:00 +0200 |
|---|---|---|
| committer | Theodore Ts'o <tytso@mit.edu> | 2010-05-16 11:00:00 +0200 |
| commit | c35a56a090eacefca07afeb994029b57d8dd8025 (patch) | |
| tree | 2a42c07c270b07725d9798bc89bc9aa0aaf2c184 /firmware | |
| parent | ext4: don't scan/accumulate more pages than mballoc will allocate (diff) | |
| download | linux-c35a56a090eacefca07afeb994029b57d8dd8025.tar.xz linux-c35a56a090eacefca07afeb994029b57d8dd8025.zip | |
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>
Diffstat (limited to 'firmware')
0 files changed, 0 insertions, 0 deletions