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    SubjectRe: [PATCH RFC] locking/mutexes: don't spin on owner when wait list is not NULL.
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    On Sat, Jan 30, 2016 at 9:18 AM, Ding Tianhong <dingtianhong@huawei.com> wrote:
    > On 2016/1/29 17:53, Peter Zijlstra wrote:
    >> On Sun, Jan 24, 2016 at 04:03:50PM +0800, Ding Tianhong wrote:
    >>
    >>> looks good to me, I will try this solution and report the result, thanks everyone.
    >>
    >> Did you get a change to run with this?
    >>
    >> .
    >>
    >
    > I backport this patch to 3.10 lts kernel, and didn't change any logic, Till now, the patch works fine to me, and no need to change anything,
    > So I think this patch is no problem, could you formal release this patch to the latest kernel? :)
    >
    > Thanks.
    > Ding
    >
    >

    The original patch from Tianhong triggered a performance regression
    because the optimistic spinning is turned off in effect. I tested
    Peter's patch with same configuration and there show no regression.
    So I think the patch keep the optimistic spinning. Test result
    details will be in the next email.

    Best Regards,
    Huang, YIng

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