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| author | Waiman Long <longman@redhat.com> | 2019-01-29 22:53:46 +0100 |
|---|---|---|
| committer | Ingo Molnar <mingo@kernel.org> | 2019-02-04 09:03:30 +0100 |
| commit | 412f34a82ccf7dd52f6b197f6450a33f03342523 (patch) | |
| tree | 6b913e5cee60855278cefa0bb954531f40f07481 /lib/refcount.c | |
| parent | locking/qspinlock: Handle > 4 slowpath nesting levels (diff) | |
| download | linux-412f34a82ccf7dd52f6b197f6450a33f03342523.tar.xz linux-412f34a82ccf7dd52f6b197f6450a33f03342523.zip | |
locking/qspinlock_stat: Track the no MCS node available case
Track the number of slowpath locking operations that are being done
without any MCS node available as well renaming lock_index[123] to make
them more descriptive.
Using these stat counters is one way to find out if a code path is
being exercised.
Signed-off-by: Waiman Long <longman@redhat.com>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: Borislav Petkov <bp@alien8.de>
Cc: H. Peter Anvin <hpa@zytor.com>
Cc: James Morse <james.morse@arm.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: SRINIVAS <srinivas.eeda@oracle.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Will Deacon <will.deacon@arm.com>
Cc: Zhenzhong Duan <zhenzhong.duan@oracle.com>
Link: https://lkml.kernel.org/r/1548798828-16156-3-git-send-email-longman@redhat.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Diffstat (limited to 'lib/refcount.c')
0 files changed, 0 insertions, 0 deletions