linux-kernel - Re: [PATCH 3/9] powerpc/pseries: remove the ppc-cmm file system

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Date:   Wed, 10 Mar 2021 16:29:51 +0000
From:   Al Viro <viro@...iv.linux.org.uk>
To:     Christoph Hellwig <hch@....de>
Cc:     Andrew Morton <akpm@...ux-foundation.org>,
        Daniel Vetter <daniel@...ll.ch>, Nadav Amit <namit@...are.com>,
        "VMware, Inc." <pv-drivers@...are.com>,
        "Michael S. Tsirkin" <mst@...hat.com>,
        David Hildenbrand <david@...hat.com>,
        Minchan Kim <minchan@...nel.org>,
        Nitin Gupta <ngupta@...are.org>,
        Jason Gunthorpe <jgg@...dia.com>,
        Alex Williamson <alex.williamson@...hat.com>,
        linuxppc-dev@...ts.ozlabs.org, linux-kernel@...r.kernel.org,
        dri-devel@...ts.freedesktop.org,
        virtualization@...ts.linux-foundation.org,
        linux-fsdevel@...r.kernel.org, linux-mm@...ck.org
Subject: Re: [PATCH 3/9] powerpc/pseries: remove the ppc-cmm file system

On Tue, Mar 09, 2021 at 04:53:42PM +0100, Christoph Hellwig wrote:
> Just use the generic anon_inode file system.

Umm...  The only problem I see here is the lifetime rules for
that module, and that's not something introduced in this patchset.
Said that, looks like the logics around that place is duplicated in
cmm.c, vmw_balloon.c and virtion_balloon.c and I wonder if it would
be better off with a helper in mm/balloon.c to be used for that setup...