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Subject: Re: [LKP] Re: [hugetlbfs] c0d0381ade: vm-scalability.throughput
 -33.4% regression
To:     Mike Kravetz <mike.kravetz@oracle.com>,
        kernel test robot <rong.a.chen@intel.com>
Cc:     Linus Torvalds <torvalds@linux-foundation.org>,
        Andrew Morton <akpm@linux-foundation.org>,
        Michal Hocko <mhocko@kernel.org>,
        Hugh Dickins <hughd@google.com>,
        Naoya Horiguchi <n-horiguchi@ah.jp.nec.com>,
        "Aneesh Kumar K.V" <aneesh.kumar@linux.vnet.ibm.com>,
        Andrea Arcangeli <aarcange@redhat.com>,
        "Kirill A.Shutemov" <kirill.shutemov@linux.intel.com>,
        Davidlohr Bueso <dave@stgolabs.net>,
        Prakash Sangappa <prakash.sangappa@oracle.com>,
        LKML <linux-kernel@vger.kernel.org>, lkp@lists.01.org
References: <20200622005551.GK5535@shao2-debian>
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 <68992a81-a1b9-467b-59c4-48ab65c601c5@linux.intel.com>
 <7540556c-1e07-51b2-d903-829a887ef5b6@oracle.com>
 <4c95b307-90b5-798f-34c1-000ea5331ebb@linux.intel.com>
 <a44417ad-ad5c-aab6-d656-badd4cfad60e@oracle.com>
From:   Xing Zhengjun <zhengjun.xing@linux.intel.com>
Message-ID: <6922f83b-32af-0535-c251-5bf2711a0e30@linux.intel.com>
Date:   Tue, 13 Oct 2020 14:05:31 +0800
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On 10/13/2020 11:01 AM, Mike Kravetz wrote:
> On 10/12/20 6:59 PM, Xing Zhengjun wrote:
>>
>>
>> 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?
>>
> 
> My apologies.  I missed that you were not cc'ed on this thred:
> https://lore.kernel.org/linux-mm/20200706202615.32111-1-mike.kravetz@oracle.com/
> 
> As mentioned, there will likely be another revision to the way locking is
> handled.  The new scheme will try to consider performance as is done in
> the above link.  I suggest you wait for next revision.  If you do not mind,
> I will cc you when the new code is posted.
> 

OK. I will wait for the next revision.

-- 
Zhengjun Xing