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SubjectRe: [PATCH v3 0/5] Switch arm64 over to qrwlock
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Hi, all.


On 2017/10/20 0:53, Will Deacon wrote:
> I've not had any more feedback on this and the testing results are very
> encouraging so I'd like to merge it for 4.15. However, it might make more
> sense for the whole thing to go via -tip instead.
>
> Ingo, Peter: what do you prefer?
>
> Will
>
>> Will Deacon (5):
>> kernel/locking: Use struct qrwlock instead of struct __qrwlock
>> locking/atomic: Add atomic_cond_read_acquire
>> kernel/locking: Use atomic_cond_read_acquire when spinning in qrwlock
>> arm64: locking: Move rwlock implementation over to qrwlocks
>> kernel/locking: Prevent slowpath writers getting held up by fastpath
>>
>> arch/arm64/Kconfig | 17 ++++
>> arch/arm64/include/asm/Kbuild | 1 +
>> arch/arm64/include/asm/spinlock.h | 164 +-------------------------------
>> arch/arm64/include/asm/spinlock_types.h | 6 +-
>> include/asm-generic/atomic-long.h | 3 +
>> include/asm-generic/qrwlock.h | 37 ++-----
>> include/asm-generic/qrwlock_types.h | 15 ++-
>> include/linux/atomic.h | 4 +
>> kernel/locking/qrwlock.c | 86 +++--------------
>> 9 files changed, 61 insertions(+), 272 deletions(-)
>>
>> --
>> 2.1.4

I am very interested in this change.
Can you share the testing result for me?
Or Test methods, especially test suite and so on.

I would like to further test the performance.

Thanks.
Cheng Jian


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