linux-kernel - Re: [PATCH 0/4] add struct page and Direct I/O support to reserved memory

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Message-ID: <Ysw7TMFO8Mw0nq8x@infradead.org>
Date:   Mon, 11 Jul 2022 08:01:32 -0700
From:   Christoph Hellwig <hch@...radead.org>
To:     Li Chen <me@...ux.beauty>
Cc:     Catalin Marinas <catalin.marinas@....com>,
        Will Deacon <will@...nel.org>,
        Rob Herring <robh+dt@...nel.org>,
        Frank Rowand <frowand.list@...il.com>,
        Andrew Morton <akpm@...ux-foundation.org>,
        linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
        devicetree@...r.kernel.org, linux-mm@...ck.org
Subject: Re: [PATCH 0/4] add struct page and Direct I/O support to reserved
 memory

Who is going to use it and how?  Because normally the reserved memory
is used through the DMA allocator, and you can't just do direct I/O
to that.