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Date: Tue, 8 Dec 2020 14:38:11 +0100
From: Daniel Wagner <dwagner@suse.de>
Subject: Re: store a pointer to the block_device in struct bio (again)
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References: <20201201165424.2030647-1-hch@lst.de>
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To: Christoph Hellwig <hch@lst.de>
Cc: Qian Cai <qcai@redhat.com>, Jens Axboe <axboe@kernel.dk>, Tejun Heo <tj@kernel.org>, Coly Li <colyli@suse.de>, Song Liu <song@kernel.org>, dm-devel@redhat.com, linux-bcache@vger.kernel.org, linux-raid@vger.kernel.org, linux-s390@vger.kernel.org, linux-block@vger.kernel.org, Stephen Rothwell <sfr@canb.auug.org.au>, Linux Next Mailing List <linux-next@vger.kernel.org>

On Tue, Dec 08, 2020 at 12:04:03PM +0100, Christoph Hellwig wrote:
> can you send me details of your device mapper setup, e.g. which targets
> are used, are they used on top of whole device or partitions.  Do you
> use partitions on top of the dm devices?  Are any other stacking devices
> involved?

FWIW, I tried linux-next yesterday and got the root fs (btrfs)
corrupted. It is a very simple setup, just plain FS on SCSI device.