From: Jason Gunthorpe <jgg-VPRAkNaXOzVWk0Htik3J/w@public.gmane.org>
To: Yuval Shaia <yuval.shaia-QHcLZuEGTsvQT0dZR+AlfA@public.gmane.org>
Cc: Alex Margolin <alexma-VPRAkNaXOzVWk0Htik3J/w@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: Mon, 29 Jan 2018 10:27:17 -0700 [thread overview]
Message-ID: <20180129172717.GW23852@mellanox.com> (raw)
In-Reply-To: <20180128203746.GA11635@yuvallap>
On Sun, Jan 28, 2018 at 10:37:47PM +0200, Yuval Shaia wrote:
> But let's try to take it one step further, what if all my buffers are the
> same size, of even better, all are PAGE_SIZE. So in case of "composite"
> array of let's say 262144 elements i would have wasteful 262144 * 8 bytes.
>
> This problem could be solved with a bitmap to a given range where only the
> bits that are set composed the MR.
You want this for the host on virtualization right? Like we talked
about at plumbers?
Is it really necessary to be so optimal? A list of SGLs is not good
enough?
Jason
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next prev parent reply other threads:[~2018-01-29 17:27 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
2018-01-28 20:37 ` Yuval Shaia
2018-01-29 17:27 ` Jason Gunthorpe [this message]
[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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