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Date:   Tue, 12 Oct 2021 13:44:10 -0700
From:   "Darrick J. Wong" <>
To:     Felix Kuehling <>
Cc:     Matthew Wilcox <>,
        Andrew Morton <>,
        Alex Sierra <>,,,,,,,,,,
Subject: Re: [PATCH v1 00/12] MEMORY_DEVICE_COHERENT for CPU-accessible
 coherent device memory

On Tue, Oct 12, 2021 at 04:24:25PM -0400, Felix Kuehling wrote:
> Am 2021-10-12 um 3:11 p.m. schrieb Matthew Wilcox:
> > On Tue, Oct 12, 2021 at 11:39:57AM -0700, Andrew Morton wrote:
> >> Because I must ask: if this feature is for one single computer which
> >> presumably has a custom kernel, why add it to mainline Linux?
> > I think in particular patch 2 deserves to be merged because it removes
> > a ton of cruft from every call to put_page() (at least if you're using
> > a distro config).  It makes me nervous, but I think it's the right
> > thing to do.  It may well need more fixups after it has been merged,
> > but that's life.
> Maybe we should split the first two patches into a separate series, and
> get it merged first, while the more controversial stuff is still under
> review?

Yes, please.  I've seen that first patch several times already. :)


> Thanks,
>   Felix

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