Re: [PATCH 2/5] /dev/vring: simple userspace-kernel ringbuffer interface.

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From: Andrew Morton
Date: Friday, April 18, 2008 - 11:59 am

On Sat, 19 Apr 2008 00:32:39 +1000 Rusty Russell <rusty@rustcorp.com.au> wrote:


This is may be our third high-bandwidth user/kernel interface to transport
bulk data ("hbukittbd") which was implemented because its predecessors
weren't quite right.  In a year or two's time someone else will need a
hbukittbd and will find that the existing three aren't quite right and will
give us another one.  One day we need to stop doing this ;)

It could be that this person will look at Rusty's hbukittbd and find that
it _could_ be tweaked to do what he wants, but it's already shipping and
it's part of the kernel API and hence can't be made to do what he wants.

So I think it would be good to plonk the proposed interface on the table
and have a poke at it.  Is it compat-safe?  Is it extensible in a
backward-compatible fashion?  Are there future-safe changes we should make
to it?  Can Michael Kerrisk understand, review and document it?  etc.

You know what I'm saying ;)  What is the proposed interface?
--
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Messages in current thread:
[PATCH 0/5] High-speed tun receive and xmit, Rusty Russell, (Thu Apr 17, 9:33 pm)
[PATCH 3/5] /dev/vring limit and base ioctls, Rusty Russell, (Thu Apr 17, 9:41 pm)
[PATCH 4/5] tun: vringfd receive support., Rusty Russell, (Thu Apr 17, 9:42 pm)
[PATCH 5/5] tun: vringfd xmit support., Rusty Russell, (Thu Apr 17, 9:43 pm)
Re: [PATCH 5/5] tun: vringfd xmit support., Andrew Morton, (Fri Apr 18, 4:31 am)
Re: [PATCH 5/5] tun: vringfd xmit support., pradeep singh rautela, (Fri Apr 18, 4:46 am)
Re: [PATCH 5/5] tun: vringfd xmit support., Ray Lee, (Fri Apr 18, 7:25 am)
Re: [PATCH 5/5] tun: vringfd xmit support., Rusty Russell, (Fri Apr 18, 8:15 am)
Re: [PATCH 5/5] tun: vringfd xmit support., Ray Lee, (Fri Apr 18, 9:24 am)
Re: [PATCH 5/5] tun: vringfd xmit support., pradeep singh rautela, (Fri Apr 18, 11:01 am)
Re: [PATCH 2/5] /dev/vring: simple userspace-kernel ringbu ..., Andrew Morton, (Fri Apr 18, 11:59 am)
Re: [PATCH 5/5] tun: vringfd xmit support., Andrew Morton, (Fri Apr 18, 12:06 pm)
Re: [PATCH 5/5] tun: vringfd xmit support., Andrew Morton, (Fri Apr 18, 6:54 pm)
Re: [PATCH 5/5] tun: vringfd xmit support., Rusty Russell, (Sat Apr 19, 7:41 am)
Re: [PATCH 5/5] tun: vringfd xmit support., Andrew Morton, (Sat Apr 19, 10:51 am)