linux-kernel - Re: Massive slowdown in kernels as of 6.x

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Date: Mon, 6 May 2024 10:32:18 -0300
From: Carlos Carvalho <carlos@...ica.ufpr.br>
To: Holger Kiehl <Holger.Kiehl@....de>
Cc: linux-kernel <linux-kernel@...r.kernel.org>,
	linux-raid <linux-raid@...r.kernel.org>,
	linux-block@...r.kernel.org, Jens Axboe <axboe@...nel.dk>,
	linux-ext4@...r.kernel.org, Theodore Ts'o <tytso@....edu>
Subject: Re: Massive slowdown in kernels as of 6.x

Holger Kiehl (Holger.Kiehl@....de) wrote on Mon, May 06, 2024 at 08:31:37AM -03:
> Mounted as follows:
> 
>    /dev/md0 on /u2 type ext4 (rw,nodev,noatime,commit=600,stripe=640)

Sorry, missed that. You can try

# mount -o remount,stripe=0 /dev/md0

ext4 is known to have a problem with parity raid with the symptoms you
describe and the above remount works around it. raid10 doesn't have parity but
is stripped so the workaround might work.