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From: Blue Swirl <blauwirbel@gmail.com>
To: qemu-devel@nongnu.org
Subject: Re: [Qemu-devel] [PATCH 6/6] experimental native preadv/pwritev support for Linux
Date: Sun, 15 Mar 2009 16:36:16 +0200	[thread overview]
Message-ID: <f43fc5580903150736g21deaeccmc1aff8241f4b96d7@mail.gmail.com> (raw)
In-Reply-To: <20090314193127.GC3799@lst.de>

On 3/14/09, Christoph Hellwig <hch@lst.de> wrote:
>
>
>  This ties up Gerd Hoffmann's unmegred preadv/pwritev syscalls to qemu.  Use with
>  care as the syscall numbers aren't finalized yet.
>
>  If someone of the BSD folks is interested it should be trivial to tie this up
>  for the preadv/pwritev syscalls that have been around there for a while.

At least OpenBSD has preadv & pwritev.

>  Probably wants some optimization to not try preadv/pwritev again once we got
>  the first ENOSYS.

I'd add a check to configure to see if preadv exist and then define
HAVE_PREADV. Though it's not possible to see if the kernel supports
preadv if libc support does not exist (checking features by running
programs breaks cross compilation).

  reply	other threads:[~2009-03-15 14:36 UTC|newest]

Thread overview: 20+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2009-03-14 19:27 [Qemu-devel] [PATCH 0/6] add real vectored block I/O support Christoph Hellwig
2009-03-14 19:27 ` [Qemu-devel] [PATCH 1/6] more BlockDriver C99 initializers Christoph Hellwig
2009-03-28 18:35   ` Christoph Hellwig
2009-03-14 19:28 ` [Qemu-devel] [PATCH 2/6] change vectored block I/O API to plain iovecs Christoph Hellwig
2009-03-15 12:42   ` Avi Kivity
2009-03-15 13:20     ` Anthony Liguori
2009-03-15 13:36       ` Avi Kivity
2009-03-15 14:48     ` Christoph Hellwig
2009-03-15 15:07       ` Avi Kivity
2009-03-15 16:35         ` Christoph Hellwig
2009-03-14 19:28 ` [Qemu-devel] [PATCH 3/6] virtio-blk: use generic vectored I/O APIs Christoph Hellwig
2009-03-14 19:30 ` [Qemu-devel] [PATCH 4/6] remove bdrv_aio_read/bdrv_aio_write Christoph Hellwig
2009-03-14 19:30 ` [Qemu-devel] [PATCH 5/6] push down vector linearization to posix-aio-compat.c Christoph Hellwig
2009-03-14 19:31 ` [Qemu-devel] [PATCH 6/6] experimental native preadv/pwritev support for Linux Christoph Hellwig
2009-03-15 14:36   ` Blue Swirl [this message]
2009-03-15 14:44     ` Christoph Hellwig
2009-03-15 15:03       ` Blue Swirl
2009-03-15 15:16         ` Christoph Hellwig
2009-03-16 11:38   ` Gerd Hoffmann
2009-03-16 11:53     ` Christoph Hellwig

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