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| author |   Nicholas Piggin <npiggin@gmail.com> | 2020-07-24 23:14:22 +1000 |
|---|---|---|
| committer |   Michael Ellerman <mpe@ellerman.id.au> | 2020-07-27 00:01:29 +1000 |
| commit | 2f6560e652dfdbdb59df28b45a3458bf36d3c580 (patch) | |
| tree | eb923dd64c883cf1cbd977111baf6a146ad55e23 /tools/perf/scripts/python/exported-sql-viewer.py | |
| parent | powerpc/pseries: Implement paravirt qspinlocks for SPLPAR (diff) | |
| download | wireguard-linux-2f6560e652dfdbdb59df28b45a3458bf36d3c580.tar.xz wireguard-linux-2f6560e652dfdbdb59df28b45a3458bf36d3c580.zip | |
powerpc/qspinlock: Optimised atomic_try_cmpxchg_lock() that adds the lock hint
This brings the behaviour of the uncontended fast path back to roughly
equivalent to simple spinlocks -- a single atomic op with lock hint.
Signed-off-by: Nicholas Piggin <npiggin@gmail.com>
Acked-by: Waiman Long <longman@redhat.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/20200724131423.1362108-6-npiggin@gmail.com
Diffstat (limited to 'tools/perf/scripts/python/exported-sql-viewer.py')
0 files changed, 0 insertions, 0 deletions