linux-kernel - Re: [PATCH RFC] rxe: Fix iova-to-va conversion for MR page sizes != PAGE

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Message-ID: <feefff5b-c4e1-4e4b-a24d-9829f781e132@linux.dev>
Date: Mon, 29 Dec 2025 20:57:19 -0800
From: Zhu Yanjun <yanjun.zhu@...ux.dev>
To: "Zhijian Li (Fujitsu)" <lizhijian@...itsu.com>,
 "linux-rdma@...r.kernel.org" <linux-rdma@...r.kernel.org>
Cc: "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
 "zyjzyj2000@...il.com" <zyjzyj2000@...il.com>, "jgg@...pe.ca"
 <jgg@...pe.ca>, "leon@...nel.org" <leon@...nel.org>,
 Yi Zhang <yi.zhang@...hat.com>
Subject: Re: [PATCH RFC] rxe: Fix iova-to-va conversion for MR page sizes !=
 PAGE_SIZE


在 2025/12/29 20:47, Zhijian Li (Fujitsu) 写道:
> Hi Yanjun,
>
>
> On 30/12/2025 12:02, Zhu Yanjun wrote:
>>> Hi, Yi
>>>
>>> The mentioned testcase, the link is:
>>> https://lore.kernel.org/all/CAHj4cs9XRqE25jyVw9rj9YugffLn5+f=1znaBEnu1usLOciD+g@mail.gmail.com/T/
>>>
>>> Can you help to make tests to verify whether this problem is fixed or not?
>>>
>> On x86_64 hosts, after this commit is applied, all the testcases in rdma-core can pass. But in Fedora Core 42 with ARM64 architecture,
>>
>> there are some errors with rdma-core.
>
> Many thanks for your testing.
>
> This commit should only affect IB_MR_TYPE_MEM_REG MRs, which are exposed to the
> Upper Layer Protocol (ULP) in the current kernel.
>
> Since rdma-core typically utilizes IB_MR_TYPE_USER(mr.page_size always same with PAGE_SIZE), it should not be impacted.

Got it. No worry. If this commit can pass Yi's tests, I will make tests 
again.

Let us wait for Yi's test results.

Thanks a lot for your efforts.

Zhu Yanjun

>
> Thanks
> Zhijian
>
>> I did not make tests with blktest.

-- 
Best Regards,
Yanjun.Zhu