Re: [LKP] Re: [hugetlbfs] c0d0381ade: vm-scalability.throughput -33.4% regression

[Xing Zhengjun]

On 10/13/2020 1:40 AM, Mike Kravetz wrote:
> On 10/11/20 10:29 PM, Xing Zhengjun wrote:
> > Hi Mike,
> >
> >     I re-test it in v5.9-rc8, the regression still existed. It is almost the same as 34ae204f1851. Do you have time to look at it? Thanks.
>
> Thank you for testing.
>
> Just curious, did you apply the series in this thread or just test v5.9-rc8?
> If just testing v5.9-rc8, no changes to this code were added after 34ae204f1851,
> so results being the same are expected.

I just test v5.9-rc8. Where can I find the series patches you mentioned 
here? Or just wait for the next mainline release?


> There are some functional issues with this new hugetlb locking model that
> are currently being worked.  It is likely to result in significantly different
> code.  The performance issues discovered here will be taken into account with
> the new code.  However, as previously mentioned additional synchronization
> is required for functional correctness.  As a result, there will be some
> regression in this code.

--
Zhengjun Xing