Re: [PATCH 2/2] dm-raid1: don't fail the mirror for invalid I/O errors

["Dr. David Alan Gilbert" <linux@treblig.org>]

* Keith Busch (kbusch@kernel.org) wrote:
> On Tue, Jun 16, 2026 at 08:09:18PM +0000, Dr. David Alan Gilbert wrote:
> > Interesting; I've got your:
> >   dm-raid1: don't fail the mirror for invalid I/O errors
> >   For DM_IO_BIO requests, do_region() built each destination bio by walking..
> > ontop of e21ee273e6fa3879aec9a27251cfce98156e07c4 which is just before 7.1
> >   I've not your https://lore.kernel.org/linux-block/20260612223205.465913-1-kbusch@meta.com/
> > 
> > root@dalek:/home/dg# lvcreate  --mirrors 1 -L 1G main /dev/sda2 /dev/sdb2
> > root@dalek:/home/dg# mkfs.ext4 /dev/mapper/main-lvol0
> > root@dalek:/home/dg# mount /dev/mapper/main-lvol0 /mnt/tmp/
> > root@dalek:/home/dg# chmod a+rwx /mnt/tmp
> > 
> > dg@dalek:~$ dd if=/dev/zero of=/mnt/tmp/testfile bs=1024k count=1
> > 
> > my two tests are separate tests:
> 
> Goodness, I'm struggling here. Unpatched, I have no problem recreating
> the issues you've described, but everything I've tried with the
> proposals included gets the expected results. I'm running out of ideas
> on replicating your results with hardware I have, but it's getting late,
> so I'll try to have new ideas tomorrow.

OK, no problem - let me know if there's any useful diags I can gather;
would blktrace or function tracing or something help?

Sleep tight!

Dave

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