From: Avi Kivity <avi@redhat.com>
To: Antoine Martin <antoine@nagafix.co.uk>
Cc: Michael Tokarev <mjt@tls.msk.ru>,
Christoph Hellwig <hch@infradead.org>,
kvm@vger.kernel.org
Subject: Re: raw disks no longer work in latest kvm (kvm-88 was fine)
Date: Sun, 23 May 2010 18:12:36 +0300 [thread overview]
Message-ID: <4BF945E4.8080209@redhat.com> (raw)
In-Reply-To: <4BF93EF5.5090106@nagafix.co.uk>
On 05/23/2010 05:43 PM, Antoine Martin wrote:
>>> Description of the problem:
>>> A guest tries to mount a large raw partition (1.5TB /dev/sda9 in my
>>> case), this fails with pread enabled, works with it disabled.
>>
>> Did you mean: preadv?
>
> Yes, here's what makes it work ok (as suggested by Christoph earlier
> in the thread) in posix-aio-compat.c:
> #undef CONFIG_PREADV
> #ifdef CONFIG_PREADV
> static int preadv_present = 1;
> #else
> static int preadv_present = 0;
> #endif
When preadv_present=1, does strace -fF show preadv being called?
If so, the kernel's preadv() is broken.
If not, glibc's preadv() emulation is broken.
>>
>> Does aio=native help?
> It does indeed!
That's recommended anyway on raw partitions with cache=off.
--
error compiling committee.c: too many arguments to function
next prev parent reply other threads:[~2010-05-23 15:12 UTC|newest]
Thread overview: 51+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-03-06 20:48 raw disks no longer work in latest kvm (kvm-88 was fine) Antoine Martin
2010-03-06 21:28 ` Michael Tokarev
2010-03-07 4:14 ` Antoine Martin
2010-03-07 9:32 ` Michael Tokarev
2010-03-07 10:00 ` Christoph Hellwig
2010-03-07 13:12 ` Antoine Martin
2010-03-07 13:52 ` Antoine Martin
2010-03-07 15:15 ` Michael Tokarev
2010-03-07 17:11 ` Antoine Martin
2010-03-07 17:18 ` Avi Kivity
2010-03-07 17:21 ` Christoph Hellwig
2010-03-07 17:30 ` Avi Kivity
2010-03-07 17:34 ` Christoph Hellwig
2010-03-07 18:43 ` raw disks no longer work in latest kvm (kvm-88 was fine) [SOLVED] Antoine Martin
2010-03-07 18:55 ` Avi Kivity
2010-03-07 18:01 ` raw disks no longer work in latest kvm (kvm-88 was fine) Antoine Martin
2010-03-07 18:47 ` Avi Kivity
2010-03-07 19:07 ` Antoine Martin
2010-03-07 19:10 ` Avi Kivity
2010-03-07 19:13 ` Antoine Martin
2010-03-07 19:17 ` Avi Kivity
2010-03-07 19:25 ` Antoine Martin
2010-03-07 19:35 ` Avi Kivity
2010-03-13 9:51 ` Antoine Martin
2010-03-14 7:34 ` Avi Kivity
2010-04-08 22:00 ` Antoine Martin
2010-05-22 10:44 ` Antoine Martin
2010-05-22 11:17 ` Michael Tokarev
2010-05-22 11:35 ` Antoine Martin
2010-05-23 8:53 ` Antoine Martin
2010-05-23 11:57 ` Avi Kivity
2010-05-23 14:07 ` Antoine Martin
2010-05-23 14:18 ` Avi Kivity
2010-05-23 14:43 ` Antoine Martin
2010-05-23 14:53 ` Antoine Martin
2010-05-23 14:56 ` Avi Kivity
2010-05-23 15:06 ` Antoine Martin
2010-05-23 15:12 ` Avi Kivity [this message]
2010-05-23 16:18 ` Antoine Martin
2010-05-23 17:47 ` Stefan Hajnoczi
2010-05-29 9:42 ` Antoine Martin
2010-05-29 9:55 ` Stefan Hajnoczi
2010-05-29 10:34 ` Christoph Hellwig
2010-05-29 11:06 ` Stefan Hajnoczi
2010-05-29 10:34 ` Christoph Hellwig
2010-03-07 19:09 ` Asdo
2010-03-07 19:11 ` Antoine Martin
2010-03-07 19:12 ` Avi Kivity
2010-03-07 16:21 ` Avi Kivity
2010-03-08 16:45 ` Anthony Liguori
2010-03-07 9:36 ` Gleb Natapov
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