Message-ID: <27973649-193d-a485-1ca7-983a53c7cf78@intel.com>
Date:   Tue, 28 Dec 2021 10:30:43 +0800
User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:91.0) Gecko/20100101
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Subject: Re: RE: very low IOPS due to "block: reduce
 kblockd_mod_delayed_work_on() CPU consumption"
Content-Language: en-US
To:     Dexuan Cui <decui@microsoft.com>, Jens Axboe <axboe@kernel.dk>,
        "Alex Xu (Hello71)" <alex_y_xu@yahoo.ca>,
        "linux-block@vger.kernel.org" <linux-block@vger.kernel.org>,
        "ming.lei@redhat.com" <ming.lei@redhat.com>,
        "hch@lst.de" <hch@lst.de>, Long Li <longli@microsoft.com>,
        "Michael Kelley (LINUX)" <mikelley@microsoft.com>,
        "linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
        "Sang, Oliver" <oliver.sang@intel.com>,
        "Li, Philip" <philip.li@intel.com>
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From:   Yin Fengwei <fengwei.yin@intel.com>
In-Reply-To: <BYAPR21MB127067C16809209C019BC83BBF7B9@BYAPR21MB1270.namprd21.prod.outlook.com>
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Hi Jens, Dexuan,

On 12/20/2021 1:15 PM, Dexuan Cui wrote:
>> From: Jens Axboe <axboe@kernel.dk>
>> Sent: Sunday, December 19, 2021 7:28 AM
>>> ...
>>> Dexuan, can you test this for your test case too? I'm going to queue
>>> up a revert for -rc6 just in case.
>>
>> This one should be better...
>> ...
>> Jens Axboe
> 
> Hi Jens, sorry -- unluckily I lost the test environment.. :-(
> I pinged the user to set up the test environment again, but he's
> on vacation till the beginning of January.

We hit this issue in our testing env also and will help to verify
your fixing patch. Thanks.


Regards
Yin, Fengwei