From: Jason Gunthorpe <jgg-uk2M96/98Pc@public.gmane.org>
To: Alex Margolin <alexma-VPRAkNaXOzVWk0Htik3J/w@public.gmane.org>
Cc: Yuval Shaia <yuval.shaia-QHcLZuEGTsvQT0dZR+AlfA@public.gmane.org>,
Marcel Apfelbaum <marcel-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>,
"linux-rdma-u79uwXL29TY76Z2rM5mHXA@public.gmane.org"
<linux-rdma-u79uwXL29TY76Z2rM5mHXA@public.gmane.org>
Subject: Re: [RFC rdma-core 2/2] verbs: Introduce non-contiguous memory registration
Date: Thu, 25 Jan 2018 09:07:25 -0700 [thread overview]
Message-ID: <20180125160725.GC10706@ziepe.ca> (raw)
In-Reply-To: <VI1PR05MB12787572593F02F05AA20DE1B9E10-79XLn2atqDMOK6E67s+DINqRiQSDpxhJvxpqHgZTriW3zl9H0oFU5g@public.gmane.org>
On Thu, Jan 25, 2018 at 12:43:05PM +0000, Alex Margolin wrote:
> Actually, I realized it can be implemented with the proposed API.
> All that is missing is a capability bit and a flag for set_layout_*,
> and the implementation could work as follows (changes relative to SG example):
This can work..
> In this case calling ibv_mr_set_layout_sg() will cause an internal registration
> replacing the ibv_reg_mr calls for mr1 and mr2, and the registration will be stored
> in mr3.
Yuval is right though, in cases where the buffers are page aligned we
can ask the kernel to create a single normal MR supported by all HW.
Could be a useful feature.
Jason
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next prev parent reply other threads:[~2018-01-25 16:07 UTC|newest]
Thread overview: 18+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-01-04 17:47 [RFC rdma-core 1/2] Registering non-contiguous memory Alex Margolin
[not found] ` <1515088046-26605-1-git-send-email-alexma-VPRAkNaXOzVWk0Htik3J/w@public.gmane.org>
2018-01-04 17:47 ` [RFC rdma-core 2/2] verbs: Introduce non-contiguous memory registration Alex Margolin
[not found] ` <1515088046-26605-2-git-send-email-alexma-VPRAkNaXOzVWk0Htik3J/w@public.gmane.org>
2018-01-11 12:22 ` Yuval Shaia
2018-01-11 16:44 ` Jason Gunthorpe
[not found] ` <20180111164455.GA1309-uk2M96/98Pc@public.gmane.org>
2018-01-22 15:59 ` Alex Margolin
[not found] ` <VI1PR05MB1278C4C4FF78B4B1A551252EB9EC0-79XLn2atqDMOK6E67s+DINqRiQSDpxhJvxpqHgZTriW3zl9H0oFU5g@public.gmane.org>
2018-01-23 20:29 ` Yuval Shaia
2018-01-25 12:43 ` Alex Margolin
[not found] ` <VI1PR05MB12787572593F02F05AA20DE1B9E10-79XLn2atqDMOK6E67s+DINqRiQSDpxhJvxpqHgZTriW3zl9H0oFU5g@public.gmane.org>
2018-01-25 16:07 ` Jason Gunthorpe [this message]
2018-01-28 20:37 ` Yuval Shaia
2018-01-29 17:27 ` Jason Gunthorpe
[not found] ` <20180129172717.GW23852-VPRAkNaXOzVWk0Htik3J/w@public.gmane.org>
2018-01-30 11:35 ` Marcel Apfelbaum
[not found] ` <12d04e1b-6024-0763-f5c5-46ca8b0823a6-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>
2018-01-30 15:42 ` Jason Gunthorpe
[not found] ` <20180130154200.GD21679-VPRAkNaXOzVWk0Htik3J/w@public.gmane.org>
2018-01-31 12:27 ` Marcel Apfelbaum
[not found] ` <76b5a8cf-b3ed-c76d-6157-91fc5f6f2b35-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>
2018-01-31 18:38 ` Jason Gunthorpe
[not found] ` <20180131183810.GA23352-VPRAkNaXOzVWk0Htik3J/w@public.gmane.org>
2018-02-01 18:22 ` Marcel Apfelbaum
[not found] ` <dded9055-a329-9b9d-943a-7a60445e2ada-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>
2018-02-01 18:29 ` Jason Gunthorpe
[not found] ` <20180201182959.GN23352-VPRAkNaXOzVWk0Htik3J/w@public.gmane.org>
2018-02-01 18:45 ` Marcel Apfelbaum
2018-01-25 13:10 ` Alex Margolin
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