From: Jamie Lokier <jamie@shareable.org>
To: qemu-devel@nongnu.org
Cc: Andrea Arcangeli <aarcange@redhat.com>
Subject: Re: [Qemu-devel] [RFC 1/2] pci-dma-api-v1
Date: Fri, 28 Nov 2008 19:18:19 +0000 [thread overview]
Message-ID: <20081128191819.GA18031@shareable.org> (raw)
In-Reply-To: <f43fc5580811281103t5c396e3ay9c98b6c1658dd8dd@mail.gmail.com>
Blue Swirl wrote:
> > I wonder how can possibly aio_readv/writev be missing in posix aio?
> > Unbelievable. It'd be totally trivial to add those to glibc, much
> > easier infact than to pthread_create by hand, but how can we add a
> > dependency on a certain glibc version? Ironically it'll be more
> > user-friendly to add dependency on linux kernel-aio implementation
> > that is already available for ages and it's guaranteed to run faster
> > (or at least not slower).
>
> There's also lio_listio that provides for vectored AIO.
I think lio_listio is the missing aio_readv/writev.
It's more versatile, and that'll by why POSIX never bothered with
aio_readv/writev.
Doesn't explain why they didn't _start_ with aio_readv before
inventing lio_listio, but there you go. Unix history.
-- Jamie
next prev parent reply other threads:[~2008-11-28 19:18 UTC|newest]
Thread overview: 32+ messages / expand[flat|nested] mbox.gz Atom feed top
2008-11-27 12:35 [Qemu-devel] [RFC 1/2] pci-dma-api-v1 Andrea Arcangeli
2008-11-27 12:43 ` [Qemu-devel] [RFC 2/2] bdrv_aio_readv/writev_em Andrea Arcangeli
2008-11-28 11:09 ` Jamie Lokier
2008-11-27 19:14 ` [Qemu-devel] [RFC 1/2] pci-dma-api-v1 Blue Swirl
2008-11-28 1:56 ` Andrea Arcangeli
2008-11-28 17:59 ` Blue Swirl
2008-11-28 18:50 ` Andrea Arcangeli
2008-11-28 19:03 ` Blue Swirl
2008-11-28 19:18 ` Jamie Lokier [this message]
2008-11-29 19:49 ` Avi Kivity
2008-11-30 17:20 ` Andrea Arcangeli
2008-11-30 22:31 ` Anthony Liguori
2008-11-30 18:04 ` Andrea Arcangeli
2008-11-30 17:41 ` [Qemu-devel] [RFC 1/1] pci-dma-api-v2 Andrea Arcangeli
2008-11-30 18:36 ` [Qemu-devel] " Blue Swirl
2008-11-30 19:04 ` Andrea Arcangeli
2008-11-30 19:11 ` Blue Swirl
2008-11-30 19:20 ` Andrea Arcangeli
2008-11-30 21:36 ` Blue Swirl
2008-11-30 22:54 ` Anthony Liguori
2008-11-30 22:50 ` [Qemu-devel] " Anthony Liguori
2008-12-01 9:41 ` Avi Kivity
2008-12-01 16:37 ` Anthony Liguori
2008-12-02 9:45 ` Avi Kivity
2008-11-30 22:38 ` [Qemu-devel] [RFC 1/2] pci-dma-api-v1 Anthony Liguori
2008-11-30 22:51 ` Jamie Lokier
2008-11-30 22:34 ` Anthony Liguori
2008-11-29 19:48 ` Avi Kivity
2008-11-30 17:29 ` Andrea Arcangeli
2008-11-30 20:27 ` Avi Kivity
2008-11-30 22:33 ` Andrea Arcangeli
2008-11-30 22:33 ` Anthony Liguori
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