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Date: Tue, 16 Jun 2026 08:19:46 -0600
From: Keith Busch <kbusch@kernel.org>
To: "Dr. David Alan Gilbert" <dave@treblig.org>
Cc: zkabelac@redhat.com, Vjaceslavs Klimovs <vklimovs@gmail.com>,
	Thorsten Leemhuis <regressions@leemhuis.info>, trnka@scm.com,
	linux-block@vger.kernel.org, dm-devel@lists.linux.dev,
	Linux kernel regressions list <regressions@lists.linux.dev>
Subject: Re: Repeatable, raid1+O_DIRECT, hang/warn
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In-Reply-To: <ajFK5NXkxd6jU5zu@gallifrey>

On Tue, Jun 16, 2026 at 01:08:52PM +0000, Dr. David Alan Gilbert wrote:
> ( lvcreate  -m 1 -L 1G main /dev/sda2 /dev/sdb2 ) rather than
> the old mirror with the same patch, then:
> 
>   a) I get no log errors with either read or write
>   b) read still gives EIO

I've a follow up patch to handle the error properly. You want to see
EINVAL, not EIO, and that error shouldn't be considered for determining
the raid health. Something like what f7b24c7b41f23b5 does, but it's a
little more complicated in this path since it doesn't see the lower
level error status and just converts everything to EIO.