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From:   David Howells <dhowells@redhat.com>
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References: <ZG2mKMus29qquHia@infradead.org> <20230522205744.2825689-1-dhowells@redhat.com> <168487791137.449781.3170440352656135902.b4-ty@kernel.dk>
To:     Christoph Hellwig <hch@infradead.org>
Cc:     dhowells@redhat.com, Jens Axboe <axboe@kernel.dk>,
        Al Viro <viro@zeniv.linux.org.uk>,
        Matthew Wilcox <willy@infradead.org>, Jan Kara <jack@suse.cz>,
        Jeff Layton <jlayton@kernel.org>,
        David Hildenbrand <david@redhat.com>,
        Logan Gunthorpe <logang@deltatee.com>,
        Hillf Danton <hdanton@sina.com>,
        Christian Brauner <brauner@kernel.org>,
        Linus Torvalds <torvalds@linux-foundation.org>,
        linux-fsdevel@vger.kernel.org, linux-block@vger.kernel.org,
        linux-kernel@vger.kernel.org, linux-mm@kvack.org,
        Jason Gunthorpe <jgg@ziepe.ca>
Subject: Re: [PATCH v21 0/6] block: Use page pinning
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Date:   Wed, 24 May 2023 08:35:39 +0100
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Christoph Hellwig <hch@infradead.org> wrote:

> > Applied, thanks!
> 
> This ended up on the for-6.5/block branch, but I think it needs to be
> on the splice one, as that is pre-requisite unless I'm missing
> something.

Indeed.  As I noted in the cover note:

    This requires the splice-read patchset to have been applied first,
    otherwise reversion of the ITER_PAGE iterator can race with truncate and
    return pages to the allocator whilst they're still undergoing DMA[2].

David