From: Avi Kivity <avi@redhat.com>
To: Christoph Hellwig <hch@infradead.org>
Cc: Antoine Martin <antoine@nagafix.co.uk>,
Michael Tokarev <mjt@tls.msk.ru>,
kvm@vger.kernel.org
Subject: Re: raw disks no longer work in latest kvm (kvm-88 was fine)
Date: Sun, 07 Mar 2010 19:30:06 +0200 [thread overview]
Message-ID: <4B93E29E.6090609@redhat.com> (raw)
In-Reply-To: <20100307172151.GA24859@infradead.org>
On 03/07/2010 07:21 PM, Christoph Hellwig wrote:
> On Sun, Mar 07, 2010 at 07:18:40PM +0200, Avi Kivity wrote:
>
>>> The only things that stands out is this before the "read failed" message:
>>> [pid 9098] lseek(12, 0, SEEK_END) = 1321851815424
>>> [pid 9121] pread(12, 0x7fa50a0e47d0, 2048, 0) = -1 EINVAL (Invalid
>>> argument)
>>>
>>>
>> The buffer is unaligned here, yet the file was opened with O_DIRECT
>> (cache=none). This is strange, since alignment is not related to disk
>> size.
>>
> The other interesting thing is that it's using pread - which means
> it's a too old kernel to use preadv and thus a not very well tested
> codepath with current qemu.
>
It may also be that glibc is emulating preadv, incorrectly.
Antoine, can you check this? ltrace may help, or run 'strings libc.so |
grep pread'.
--
error compiling committee.c: too many arguments to function
next prev parent reply other threads:[~2010-03-07 17:30 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 [this message]
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
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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