From: "H. Peter Anvin" <hpa-YMNOUZJC4hwAvxtiuMwx3w@public.gmane.org>
To: Jeremy Allison <jra-eUNUBHrolfbYtjvyW6yDsg@public.gmane.org>
Cc: Ric Wheeler <ricwheeler-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>,
"linux-scsi-u79uwXL29TY76Z2rM5mHXA@public.gmane.org"
<linux-scsi-u79uwXL29TY76Z2rM5mHXA@public.gmane.org>,
linux-fsdevel
<linux-fsdevel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org>,
Hannes Reinecke <hare-l3A5Bk7waGM@public.gmane.org>,
Andrew Morton
<akpm-de/tnXTf+JLsfHDXvbKv3WD2FQJk+8+b@public.gmane.org>,
linux-nfs-u79uwXL29TY76Z2rM5mHXA@public.gmane.org,
Joel Becker <jlbec-aKy9MeLSZ9dg9hUCZPvPmw@public.gmane.org>,
James Bottomley
<James.Bottomley-d9PhHud1JfjCXq6kfMZ53/egYHeGw8Jk@public.gmane.org>
Subject: Re: copy offload support in Linux - new system call needed?
Date: Mon, 19 Dec 2011 14:19:43 -0800 [thread overview]
Message-ID: <4EEFB87F.9000104@zytor.com> (raw)
In-Reply-To: <20111214195931.GC10664@samba2>
On 12/14/2011 11:59 AM, Jeremy Allison wrote:
>>
>> Can we resurrect this effort? Is copyfile() still a good way to go,
>> or should we look at other hooks?
>
> Windows uses a COPYCHUNK call, which specifies the
> following parameters:
>
> Definition of a copy "chunk":
>
> hyper source_off;
> hyper target_off;
> uint32 length;
>
> and an array of these chunks which is passed
> into their kernel.
>
> This is what we have to implement in Samba.
>
Could we do this by (re-)allowing sendfile() between two files?
-hpa
--
To unsubscribe from this list: send the line "unsubscribe linux-nfs" in
the body of a message to majordomo-u79uwXL29TY76Z2rM5mHXA@public.gmane.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
next prev parent reply other threads:[~2011-12-19 22:19 UTC|newest]
Thread overview: 29+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-12-14 19:22 copy offload support in Linux - new system call needed? Ric Wheeler
2011-12-14 19:27 ` Al Viro
[not found] ` <20111214192739.GN2203-3bDd1+5oDREiFSDQTTA3OLVCufUGDwFn@public.gmane.org>
2011-12-14 19:42 ` Ric Wheeler
[not found] ` <4EE8FC2E.3010207-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
2011-12-14 22:27 ` J. Bruce Fields
2011-12-15 14:59 ` Trond Myklebust
2011-12-15 15:52 ` Chris Mason
2011-12-15 16:00 ` Trond Myklebust
2011-12-15 16:03 ` Jeff Layton
[not found] ` <20111215110330.33aed3a6-xSBYVWDuneFaJnirhKH9O4GKTjYczspe@public.gmane.org>
2011-12-15 16:06 ` Trond Myklebust
[not found] ` <1323965176.14317.11.camel-SyLVLa/KEI9HwK5hSS5vWB2eb7JE58TQ@public.gmane.org>
2011-12-15 16:16 ` Jeff Layton
2011-12-15 16:38 ` Trond Myklebust
2011-12-15 16:08 ` Loke, Chetan
[not found] ` <D3F292ADF945FB49B35E96C94C2061B91516E391-2s2rCY1e8UXHBhWB4kaBDUEOCMrvLtNR@public.gmane.org>
2011-12-15 16:11 ` Trond Myklebust
2011-12-15 16:40 ` Loke, Chetan
2011-12-15 16:53 ` Trond Myklebust
[not found] ` <1323968015.14317.28.camel-SyLVLa/KEI9HwK5hSS5vWB2eb7JE58TQ@public.gmane.org>
2011-12-15 17:18 ` Ric Wheeler
2011-12-15 17:25 ` Trond Myklebust
2011-12-15 17:31 ` Loke, Chetan
2011-12-15 17:55 ` Ric Wheeler
2011-12-15 17:27 ` Loke, Chetan
[not found] ` <1323961140.14317.2.camel-SyLVLa/KEI9HwK5hSS5vWB2eb7JE58TQ@public.gmane.org>
2011-12-15 17:44 ` J. Bruce Fields
2011-12-16 8:00 ` Joel Becker
2011-12-14 19:59 ` Jeremy Allison
2011-12-14 20:30 ` Ric Wheeler
2011-12-19 12:38 ` Hannes Reinecke
2011-12-19 22:19 ` H. Peter Anvin [this message]
2011-12-19 22:34 ` Jeremy Allison
2011-12-19 22:57 ` Dave Chinner
2011-12-19 23:29 ` H. Peter Anvin
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=4EEFB87F.9000104@zytor.com \
--to=hpa-ymnouzjc4hwavxtiumwx3w@public.gmane.org \
--cc=James.Bottomley-d9PhHud1JfjCXq6kfMZ53/egYHeGw8Jk@public.gmane.org \
--cc=akpm-de/tnXTf+JLsfHDXvbKv3WD2FQJk+8+b@public.gmane.org \
--cc=hare-l3A5Bk7waGM@public.gmane.org \
--cc=jlbec-aKy9MeLSZ9dg9hUCZPvPmw@public.gmane.org \
--cc=jra-eUNUBHrolfbYtjvyW6yDsg@public.gmane.org \
--cc=linux-fsdevel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org \
--cc=linux-nfs-u79uwXL29TY76Z2rM5mHXA@public.gmane.org \
--cc=linux-scsi-u79uwXL29TY76Z2rM5mHXA@public.gmane.org \
--cc=ricwheeler-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox