diff options
| author | Theodore Ts'o <tytso@mit.edu> | 2010-11-02 09:34:50 -0400 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2010-11-02 10:38:30 -0400 |
| commit | eb8abb927ae2fd1730e24ea94cd9527f3c086292 (patch) | |
| tree | e0ae72934040e8d840db503c311ac070d9850bc8 /mm | |
| parent | 7fe19da4ca38fc20cdbc7020fcf2eca8fc756410 (diff) | |
| download | linux-3.10-eb8abb927ae2fd1730e24ea94cd9527f3c086292.tar.gz linux-3.10-eb8abb927ae2fd1730e24ea94cd9527f3c086292.tar.bz2 linux-3.10-eb8abb927ae2fd1730e24ea94cd9527f3c086292.zip | |
ext4: Remove useless spinlock in ext4_getattr()
Linus noted, and complained to me, that doing while lots of "git diff"'s
of kernel sources, these spinlocks were responsible for 27% of the
spinlock cost on his two-processor system as reported by perf.
Git was doing lots of parallel stats, and this was putting a lot of
pressure on ext4_getattr(). A spinlock to protect a single
memory-to-memory copy is pointless, so remove it.
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'mm')
0 files changed, 0 insertions, 0 deletions