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Re: [Qemu-devel] [PATCH v2] block: avoid creating too large iovecs in mu

From: Christoph Hellwig
Subject: Re: [Qemu-devel] [PATCH v2] block: avoid creating too large iovecs in multiwrite_merge
Date: Mon, 1 Feb 2010 09:28:11 +0100
User-agent: Mutt/1.3.28i

On Tue, Jan 26, 2010 at 06:07:45PM -0600, Anthony Liguori wrote:
> On 01/26/2010 07:49 AM, Christoph Hellwig wrote:
> >If we go over the maximum number of iovecs support by syscall we get
> >back EINVAL from the kernel which translate to I/O errors for the guest.
> >
> >Add a MAX_IOV defintion for platforms that don't have it.  For now we use
> >the same 1024 define that's used on Linux and various other platforms,
> >but until the windows block backend implements some kind of vectored I/O
> >it doesn't matter.
> >
> >Signed-off-by: Christoph Hellwig<address@hidden>
> >   
> Applied.  Thanks.

Can you also add it to the 0.12-stable series?  There's tons of bug
reports from users seeing this regression in qemu-0.12.

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