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[Xen-users] Attempt to allocate order 5 skbuff. Increase MAX_SKBUFF_ORDE

To: xen-users@xxxxxxxxxxxxxxxxxxx
Subject: [Xen-users] Attempt to allocate order 5 skbuff. Increase MAX_SKBUFF_ORDER.
From: David Young <david@xxxxxxxxxxxxxxx>
Date: Thu, 4 Sep 2008 16:12:37 +1200
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Hi folks,

We have several CentOS 5.2 Xen Dom0s which have recently started misbehaving... xenconsoled mysteriously dies, and when I restart it, I see a bunch of these errors on the console of the DomU:

Sample:

Attempt to allocate order 5 skbuff. Increase MAX_SKBUFF_ORDER.
Attempt to allocate order 5 skbuff. Increase MAX_SKBUFF_ORDER.
Attempt to allocate order 5 skbuff. Increase MAX_SKBUFF_ORDER.
BUG: soft lockup - CPU#0 stuck for 209s! [swapper:0]

Pid: 0, comm: swapper
EIP: 0061:[<c0401227>] CPU: 0
EIP is at 0xc0401227
EFLAGS: 00000246 Not tainted (2.6.18-92.1.10.el5xen #1)
EAX: 00030001 EBX: 00000000 ECX: 00000000 EDX: f5416000
ESI: 00000220 EDI: c0772f22 EBP: 00000042 DS: 007b ES: 007b
CR0: 8005003b CR2: 08d6a7dc CR3: 00895000 CR4: 00000660
[<c054940c>] force_evtchn_callback+0xa/0xc
[<c0421f70>] vprintk+0x2b1/0x2bb
[<ee183cb1>] __ip_ct_refresh_acct+0xf6/0x129 [ip_conntrack]
[<c06094b8>] _spin_lock_irqsave+0x8/0x28

My first thought is that it's a recent Xen / kernel-xen update, since this is fairly recent behaviour. Any ideas?



----------

My setup:

Kernel:
Linux 2.6.18-92.1.10.el5xen 

xm info:
#1 SMP Tue Aug 5 08:46:32 EDT 2008 i686 i686 i386 GNU/Linux
release                : 2.6.18-92.1.10.el5xen
version                : #1 SMP Tue Aug 5 08:46:32 EDT 2008
machine                : i686
nr_cpus                : 2
nr_nodes               : 1
sockets_per_node       : 2
cores_per_socket       : 1
threads_per_core       : 1
cpu_mhz                : 930
hw_caps                : 0383fbff:00000000:00000000:00000040
total_memory           : 3071
free_memory            : 0
node_to_cpu            : node0:0-1
xen_major              : 3
xen_minor              : 1
xen_extra              : .2-92.1.10.el5
xen_caps               : xen-3.0-x86_32p 
xen_pagesize           : 4096
platform_params        : virt_start=0xf5800000
xen_changeset          : unavailable
cc_compiler            : gcc version 4.1.2 20071124 (Red Hat 4.1.2-42)
cc_compile_by          : mockbuild
cc_compile_domain      : centos.org
cc_compile_date        : Tue Aug  5 07:34:25 EDT 2008
xend_config_format     : 2

And RPM version:
# rpm -q xen
xen-3.0.3-64.el5_2.1



David Young
systems engineer
prophecy networks
Prophecy Networks
industrial strength network & security solutions
email
skype
office
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david@xxxxxxxxxxxxxxx
davidyoungnz
+64 (6) 824-3904
+64 (21) 966-716

 

On 4/09/2008, at 10:48 AM, John Hannfield wrote:

Hello,
I have Ubuntu installed as a domU on the debian dom0, and connect via VNC
in dom0. This is great for doing installs, and seeing the console
output. However
the VNC session doesn't seem to keep the active connection during a domU reboot.
Has anyone got this working?
If so, how?

--

John

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