WARNING - OLD ARCHIVES

This is an archived copy of the Xen.org mailing list, which we have preserved to ensure that existing links to archives are not broken. The live archive, which contains the latest emails, can be found at http://lists.xen.org/
   
 
 
Xen 
 
Home Products Support Community News
 
   
 

xen-users

[Xen-users] Xen breaks under high I/O load

To: xen-users@xxxxxxxxxxxxxxxxxxx
Subject: [Xen-users] Xen breaks under high I/O load
From: "Ricardo Tiago" <rtiago@xxxxxxxxx>
Date: Tue, 20 May 2008 16:02:05 +0200
Delivery-date: Tue, 20 May 2008 07:02:32 -0700
Dkim-signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=gamma; h=domainkey-signature:received:received:message-id:date:from:to:subject:mime-version:content-type:content-transfer-encoding:content-disposition; bh=EDH5x50WRMuGalYO+YblDZC77rtn3V+Mj5gPS43Dfaw=; b=XsbkHaBjwSdvpbcRp8TKjOq5pKVBWaRhoYdRMeUZAJA12bGuqFmXCmNy116OabzsTCCAZkmwlktr1JUPXMRQOXs1IWK8qjbHU6yRy2NKj4Tonp2jbEOCz3xBdPtA6T1YI3MHpYzHVm7hXSWR/vJCsiKxty2+Jay0+AKF744masQ=
Domainkey-signature: a=rsa-sha1; c=nofws; d=gmail.com; s=gamma; h=message-id:date:from:to:subject:mime-version:content-type:content-transfer-encoding:content-disposition; b=PHcPadqlu9kqX7pK/HxOwUNknWxrRw821oN4Zy+7wspbnKPvbxjfsOI+Q/Qjt6zTltIYxoqBZjjZkyoh4X6bUxb5gE68Yg+eh0auVF5yBJozQH4wLFM3IMs9FznJDGt8iIZ0BkDOR6ucmQ5Iik3AsqonT082KPhpMsFrWUwTcM0=
Envelope-to: www-data@xxxxxxxxxxxxxxxxxx
List-help: <mailto:xen-users-request@lists.xensource.com?subject=help>
List-id: Xen user discussion <xen-users.lists.xensource.com>
List-post: <mailto:xen-users@lists.xensource.com>
List-subscribe: <http://lists.xensource.com/cgi-bin/mailman/listinfo/xen-users>, <mailto:xen-users-request@lists.xensource.com?subject=subscribe>
List-unsubscribe: <http://lists.xensource.com/cgi-bin/mailman/listinfo/xen-users>, <mailto:xen-users-request@lists.xensource.com?subject=unsubscribe>
Sender: xen-users-bounces@xxxxxxxxxxxxxxxxxxx
Hi,

When performing high I/O operations on the guests, xen just breaks and
the guest dies.

 login: Unable to handle kernel NULL pointer dereference a
t virtual address 00000b54
 printing eip:
c01493b1
0c735000 -> *pde = 00000000:73639027
0b19c000 -> *pme = 00000000:71421067
0f62b000 -> *pte = 00000000:00000000
Oops: 0002 [#1]
SMP
Modules linked in: libafs(U) autofs4 sunrpc md5 ipv6 dm_mirror dm_mod xennet xen
blk ext3 jbd
CPU:    0
EIP:    0061:[<c01493b1>]    Tainted: PF     VLI
EFLAGS: 00010202   (2.6.9-67.0.4.EL.cernxenU)
EIP is at copy_page_range+0x491/0x52c
eax: 00000b50   ebx: 4bf99065   ecx: cd098300   edx: 4bf99045
esi: 00000000   edi: c1156180   ebp: 00010800   esp: cb199ec0
ds: 007b   es: 007b   ss: 0068
Process yum (pid: 2100, threadinfo=cb199000 task=ce250cd0)
Stack: 4ffc5067 00000000 00000b50 c9438b50 cc5bb250 cb19c250 00000001 0b504000
       0956a000 cc5ba000 cc735000 cd098344 cce5064c c93bf494 cd098300 c011a6b8
       cd098300 cd098080 cce5064c 00001f9a 00000000 cce50668 cce50670 cce50658
Call Trace:
 [<c011a6b8>] copy_mm+0x2d9/0x396
 [<c011b26a>] copy_process+0x6b5/0xb0b
 [<c011b7ad>] do_fork+0x8a/0x16b
 [<c012736e>] sigprocmask+0xb6/0xd0
 [<c012741f>] sys_rt_sigprocmask+0x97/0x14c
 [<c0105cff>] sys_clone+0x24/0x28
 [<c010734f>] syscall_call+0x7/0xb
Code: 89 f9 83 e2 df f6 c4 80 74 03 8b 4f 0c f0 ff 41 04 8b 4c 24 40 ff 81 80 00
 00 00 f6 47 10 01 74 06 ff 81 84 00 00 00 8b 44 24 08 <89> 70 04 89 10 f0 ff 47
 08 81 44 24 20 00 10 00 00 8b 54 24 1c
 <0>Fatal exception: panic in 5 seconds
Kernel panic - not syncing: Fatal exception

Using this xen version : https://rhn.redhat.com/errata/RHSA-2008-0194.html

Any ideas on why this happens?

Thank you,
Ricardo

_______________________________________________
Xen-users mailing list
Xen-users@xxxxxxxxxxxxxxxxxxx
http://lists.xensource.com/xen-users

<Prev in Thread] Current Thread [Next in Thread>