From: Bart Van Assche <bvanassche@acm.org>
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
Subject: Re: [PATCH RFC 1/2] RDMA/rxe: don't allow registering !PAGE_SIZE mr
Date: Sat, 28 Oct 2023 16:07:23 -0700 [thread overview]
Message-ID: <a344b3b0-a43f-47eb-b5e4-9d54cda62518@acm.org> (raw)
In-Reply-To: <45c23e30-8405-470b-825c-e5166cd8a313@linux.dev>
On 10/27/23 19:48, Zhu Yanjun wrote:
> In this case, ULP with folio will not work well with current RXE after
> this commit is applied.
Why not? RDMA ULPs like the SRP initiator driver use ib_map_mr_sg(). The
latter function calls rxe_map_mr_sg() if the RXE driver is used.
rxe_map_mr_sg() calls ib_sg_to_pages(). ib_sg_to_pages() translates
SG-entries that are larger than a virtual memory page into multiple
entries with size mr->page_size.
Thanks,
Bart.
next prev parent reply other threads:[~2023-10-28 23:07 UTC|newest]
Thread overview: 17+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-10-27 5:41 Li Zhijian
2023-10-27 5:41 ` [PATCH RFC 2/2] RDMA/rxe: set RXE_PAGE_SIZE_CAP to PAGE_SIZE Li Zhijian
2023-10-27 21:47 ` Bart Van Assche
2023-10-28 3:52 ` Zhu Yanjun
2023-10-27 8:17 ` [PATCH RFC 1/2] RDMA/rxe: don't allow registering !PAGE_SIZE mr Zhu Yanjun
2023-10-27 21:46 ` Bart Van Assche
2023-10-28 2:48 ` Zhu Yanjun
2023-10-28 23:07 ` Bart Van Assche [this message]
2023-10-29 3:22 ` Zhu Yanjun
2023-10-30 8:13 ` Zhijian Li (Fujitsu)
2023-10-30 9:43 ` Zhu Yanjun
2023-10-30 7:51 ` Zhijian Li (Fujitsu)
2023-10-30 12:40 ` Jason Gunthorpe
2023-10-31 8:52 ` Zhu Yanjun
2023-10-31 13:19 ` Jason Gunthorpe
2023-11-01 0:58 ` Greg Sword
2023-10-31 9:59 ` Zhijian Li (Fujitsu)
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