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From: Larkin Lowrey <llowrey@nuclearwinter.com>
To: linux-raid <linux-raid@vger.kernel.org>
Subject: Raid6 check performance regression 5.15 -> 5.16
Date: Mon, 7 Mar 2022 13:15:54 -0500	[thread overview]
Message-ID: <0eb91a43-a153-6e29-14b6-65f97b9f3d99@nuclearwinter.com> (raw)

I am seeing a 'check' speed regression between kernels 5.15 and 5.16. 
One host with a 20 drive array went from 170MB/s to 11MB/s. Another host 
with a 15 drive array went from 180MB/s to 43MB/s. In both cases the 
arrays are almost completely idle. I can flip between the two kernels 
with no other changes and observe the performance changes.

Is this a known issue?

--Larkin

             reply	other threads:[~2022-03-07 18:21 UTC|newest]

Thread overview: 9+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2022-03-07 18:15 Larkin Lowrey [this message]
2022-03-08  1:00 ` Raid6 check performance regression 5.15 -> 5.16 Song Liu
2022-03-08 22:31   ` Roger Heflin
2022-03-08 22:51   ` Larkin Lowrey
2022-03-09  6:35     ` Song Liu
2022-03-09 16:27       ` Roger Heflin
2022-03-08  5:44 ` Thorsten Leemhuis
2022-03-08  9:41 ` Wilson Jonathan
2022-03-08 10:32 ` Wilson Jonathan

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