diff options
| author | Will Deacon <[email protected]> | 2015-08-06 17:54:42 +0100 |
|---|---|---|
| committer | Ingo Molnar <[email protected]> | 2015-08-12 11:59:06 +0200 |
| commit | 77e430e3e45662b696dc49aa53ea0f7ac63f2574 (patch) | |
| tree | 1fae9dab1524de8b3ca2516228ff76b809626974 /tools/perf/scripts/python/export-to-postgresql.py | |
| parent | 2b2a85a4d3534b8884fcfa5bb52837f0e1c672bc (diff) | |
locking/qrwlock: Make use of _{acquire|release|relaxed}() atomics
The qrwlock implementation is slightly heavy in its use of memory
barriers, mainly through the use of _cmpxchg() and _return() atomics, which
imply full barrier semantics.
This patch modifies the qrwlock code to use the more relaxed atomic
routines so that we can reduce the unnecessary barrier overhead on
weakly-ordered architectures.
Signed-off-by: Will Deacon <[email protected]>
Signed-off-by: Peter Zijlstra (Intel) <[email protected]>
Cc: Linus Torvalds <[email protected]>
Cc: Peter Zijlstra <[email protected]>
Cc: Thomas Gleixner <[email protected]>
Cc: [email protected]
Cc: [email protected]
Link: http://lkml.kernel.org/r/[email protected]
Signed-off-by: Ingo Molnar <[email protected]>
Diffstat (limited to 'tools/perf/scripts/python/export-to-postgresql.py')
0 files changed, 0 insertions, 0 deletions