linux-kernel - RE: very low IOPS due to "block: reduce kblockd_mod_delayed_work

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Message-ID: <BYAPR21MB127067C16809209C019BC83BBF7B9@BYAPR21MB1270.namprd21.prod.outlook.com>
Date:   Mon, 20 Dec 2021 05:15:39 +0000
From:   Dexuan Cui <decui@...rosoft.com>
To:     Jens Axboe <axboe@...nel.dk>,
        "Alex Xu (Hello71)" <alex_y_xu@...oo.ca>,
        "linux-block@...r.kernel.org" <linux-block@...r.kernel.org>,
        "ming.lei@...hat.com" <ming.lei@...hat.com>,
        "hch@....de" <hch@....de>, Long Li <longli@...rosoft.com>,
        "Michael Kelley (LINUX)" <mikelley@...rosoft.com>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: RE: very low IOPS due to "block: reduce kblockd_mod_delayed_work_on()
 CPU consumption"

> From: Jens Axboe <axboe@...nel.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.