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Message-ID: <adad4ee6-ceef-4e45-a13d-048a1377e86f@acm.org>
Date:   Fri, 27 Oct 2023 14:46:14 -0700
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Subject: Re: [PATCH RFC 1/2] RDMA/rxe: don't allow registering !PAGE_SIZE mr
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To:     Zhu Yanjun <yanjun.zhu@linux.dev>,
        Li Zhijian <lizhijian@fujitsu.com>, zyjzyj2000@gmail.com,
        jgg@ziepe.ca, leon@kernel.org, linux-rdma@vger.kernel.org
Cc:     linux-kernel@vger.kernel.org, rpearsonhpe@gmail.com,
        matsuda-daisuke@fujitsu.com
References: <20231027054154.2935054-1-lizhijian@fujitsu.com>
 <53c18b2a-c3b2-4936-b654-12cb5f914622@linux.dev>
From:   Bart Van Assche <bvanassche@acm.org>
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On 10/27/23 01:17, Zhu Yanjun wrote:
> When ULP uses folio or compound page, ULP can not work well with RXE 
> after this commit is applied.

Isn't it the responsibility of the DMA mapping code to build an sg-list
for folios? Drivers like ib_srp see an sg-list, whether that comes from
a folio or from something else.

Bart.