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Date: Wed, 17 Jun 2026 10:54:38 -0600
From: Keith Busch <kbusch@kernel.org>
To: "Dr. David Alan Gilbert" <linux@treblig.org>
Cc: Keith Busch <kbusch@meta.com>, dm-devel@lists.linux.dev,
	linux-block@vger.kernel.org, mpatocka@redhat.com,
	Vjaceslavs Klimovs <vklimovs@gmail.com>
Subject: Re: [PATCH 2/2] dm-raid1: don't fail the mirror for invalid I/O
 errors
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On Wed, Jun 17, 2026 at 04:44:35PM +0000, Dr. David Alan Gilbert wrote:
> (It's a bit scary you're having to go around quite
> a few places and make similar fixes; I assume there
> are others that do similar things).

Yes, I understand that. I'm looking into a common way to validate this.
The md raid doesn't have this problem because they always call
bio_split_to_limits() first, but that's not an optimal thing to do for
dm raid in the normal read/write path, so perhaps a common checker needs
to happen generically in the block layer. Yeah, I know I removed the
previous higher level validation ... I'll try find something less costly
than what we had before.