linux-ext4 - Re: [PATCH 05/29] dax: remove the pgmap sanity checks in generic_fsdax

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Message-ID: <CAPcyv4hQ+=_8_6O77Ayv6Y2suxCKM+8bpBoqKTjjYjBLBp=GZg@mail.gmail.com>
Date:   Mon, 22 Nov 2021 19:35:36 -0800
From:   Dan Williams <dan.j.williams@...el.com>
To:     Christoph Hellwig <hch@....de>
Cc:     Mike Snitzer <snitzer@...hat.com>, Ira Weiny <ira.weiny@...el.com>,
        device-mapper development <dm-devel@...hat.com>,
        linux-xfs <linux-xfs@...r.kernel.org>,
        Linux NVDIMM <nvdimm@...ts.linux.dev>,
        linux-s390 <linux-s390@...r.kernel.org>,
        linux-fsdevel <linux-fsdevel@...r.kernel.org>,
        linux-erofs@...ts.ozlabs.org,
        linux-ext4 <linux-ext4@...r.kernel.org>,
        virtualization@...ts.linux-foundation.org
Subject: Re: [PATCH 05/29] dax: remove the pgmap sanity checks in generic_fsdax_supported

On Tue, Nov 9, 2021 at 12:33 AM Christoph Hellwig <hch@....de> wrote:
>
> Drivers that register a dax_dev should make sure it works, no need
> to double check from the file system.

Reviewed-by: Dan Williams <dan.j.williams@...el.com>

...with a self-reminder to migrate this validation to a unit test to
backstop any future refactoring of the memmap reservation code.