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Re: [Xen-devel] trace in dmesg



On 06/30/2011 08:00 AM, Konrad Rzeszutek Wilk wrote:
On Wed, Jun 29, 2011 at 10:49:58AM -0700, Mike Wright wrote:
Hi all,

I'm (finally, yeah!!!) running xen-4.1.1 with linux-3.0.0-rc5 in
runlevel 5 and so far seems indistinguishable from bare metal.

Woot!

However, this is in dmesg, and I wonder if it is important.

[    0.014109] ------------[ cut here ]------------
[    0.014144] WARNING: at arch/x86/xen/enlighten.c:714
xen_apic_write+0x1a/0x1c()
[    0.014149] Hardware name: GA-890GPA-UD3H
[    0.014152] Modules linked in:
[    0.014158] Pid: 1, comm: swapper Not tainted 3.0.0-rc4 #1
[    0.014163] Call Trace:
[    0.014170]  [<ffffffff8104ce8e>] warn_slowpath_common+0x85/0x9d
[    0.014177]  [<ffffffff8104cec0>] warn_slowpath_null+0x1a/0x1c
[    0.014182]  [<ffffffff81003450>] xen_apic_write+0x1a/0x1c
[    0.014188]  [<ffffffff81018caa>] apic_write.clone.15+0x1b/0x1d
[    0.014193]  [<ffffffff81019567>] perf_events_lapic_init+0x1c/0x1e
[    0.014200]  [<ffffffff81b6311f>] init_hw_perf_events+0xd86/0xeff
[    0.014206]  [<ffffffff8104e984>] ? set_cpu_present+0x1a/0x2a
[    0.014211]  [<ffffffff81b62399>] ? check_bugs+0x2d/0x2d
[    0.014217]  [<ffffffff81002190>] do_one_initcall+0x7f/0x137
[    0.014223]  [<ffffffff81b59c3e>] kernel_init+0x93/0x157
[    0.014229]  [<ffffffff81048230>] ? schedule_tail+0x31/0x65
[    0.014235]  [<ffffffff81485b64>] kernel_thread_helper+0x4/0x10
[    0.014241]  [<ffffffff81484c63>] ? int_ret_from_sys_call+0x7/0x1b
[    0.014248]  [<ffffffff8147e721>] ? retint_restore_args+0x5/0x6
[    0.014253]  [<ffffffff81485b60>] ? gs_change+0x13/0x13
[    0.014261] ---[ end trace a7919e7f17c0a725 ]---

It is and it is not :-) Its telling us that performance counters can't be
enabled. Which we do know about but haven't yet investigated in how
to make them work properly.

Thanks for reporting this! What is the graphic card you are using?

Built in to the motherboard: Gigabyte: GA-890GPA-UD3H.

VGA compatible controller: ATI Technologies Inc RS880 [Radeon HD 4290]

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