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| author | Nicholas Piggin <[email protected]> | 2020-07-24 13:14:21 +0000 |
|---|---|---|
| committer | Michael Ellerman <[email protected]> | 2020-07-26 14:01:29 +0000 |
| commit | 20c0e8269e9d515e677670902c7e1cc0209d6ad9 (patch) | |
| tree | 1de7272a98830301f6d21a1b8cdab7d28d0e83c1 /arch/powerpc/lib/code-patching.c | |
| parent | powerpc/64s: Implement queued spinlocks and rwlocks (diff) | |
| download | kernel-20c0e8269e9d515e677670902c7e1cc0209d6ad9.tar.gz kernel-20c0e8269e9d515e677670902c7e1cc0209d6ad9.zip | |
powerpc/pseries: Implement paravirt qspinlocks for SPLPAR
This implements the generic paravirt qspinlocks using H_PROD and
H_CONFER to kick and wait.
This uses an un-directed yield to any CPU rather than the directed
yield to a pre-empted lock holder that paravirtualised simple
spinlocks use, that requires no kick hcall. This is something that
could be investigated and improved in future.
Performance results can be found in the commit which added queued
spinlocks.
Signed-off-by: Nicholas Piggin <[email protected]>
Acked-by: Peter Zijlstra (Intel) <[email protected]>
Acked-by: Waiman Long <[email protected]>
Signed-off-by: Michael Ellerman <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Diffstat (limited to 'arch/powerpc/lib/code-patching.c')
0 files changed, 0 insertions, 0 deletions