Re: [Xen-users] Xen servers not responsive

[Jonathon Jones <xen@xxxxxxxxxx>]

I had the same problem on a previous server.  I ultimately replaced the CPU and I think that solved the problem.

Jon

Formoso, Travis wrote:

Here is what I am seeing in the log files. When the kernel hung and the following error message was displayed on the domain's console every 5 seconds.

=======================
BUG: soft lockup detected on CPU#0!
 [<c1044e8b>] softlockup_tick+0xaa/0xc1
 [<c10087af>] timer_interrupt+0x552/0x59f
 [<c1029612>] lock_timer_base+0x15/0x2f
 [<c121564f>] _spin_unlock_irqrestore+0x8/0x16
 [<c102971e>] __mod_timer+0x94/0x9e
 [<c121564f>] _spin_unlock_irqrestore+0x8/0x16
 [<c121564f>] _spin_unlock_irqrestore+0x8/0x16
 [<c121564f>] _spin_unlock_irqrestore+0x8/0x16
 [<c1045101>] handle_IRQ_event+0x1e/0x47
 [<c1046464>] handle_level_irq+0x93/0xdf
 [<c10463d1>] handle_level_irq+0x0/0xdf
 [<c10068d4>] do_IRQ+0xb5/0xdd
 [<c1215c95>] do_general_protection+0x11c/0x16f
 [<c114a90d>] evtchn_do_upcall+0x5f/0x97
 [<c1005006>] hypervisor_callback+0x46/0x50
 =======================
BUG: soft lockup detected on CPU#0!
 [<c1044e8b>] softlockup_tick+0xaa/0xc1
 [<c10087af>] timer_interrupt+0x552/0x59f
 [<c1029612>] lock_timer_base+0x15/0x2f
 [<c121564f>] _spin_unlock_irqrestore+0x8/0x16
 [<c102971e>] __mod_timer+0x94/0x9e
 [<c121564f>] _spin_unlock_irqrestore+0x8/0x16
 [<c121564f>] _spin_unlock_irqrestore+0x8/0x16
 [<c121564f>] _spin_unlock_irqrestore+0x8/0x16
 [<c1045101>] handle_IRQ_event+0x1e/0x47
 [<c1046464>] handle_level_irq+0x93/0xdf
 [<c10463d1>] handle_level_irq+0x0/0xdf
 [<c10068d4>] do_IRQ+0xb5/0xdd
 [<c114a90d>] evtchn_do_upcall+0x5f/0x97
 [<c100626f>] do_iret_error+0x0/0xb1
 [<c1005006>] hypervisor_callback+0x46/0x50
 [<c100626f>] do_iret_error+0x0/0xb1
 [<c100628d>] do_iret_error+0x1e/0xb1
 [<c1004ea5>] restore_nocheck_notrace+0xe/0xf
 [<c1006778>] do_softirq+0x1f/0xc6
 [<c1006778>] do_softirq+0x1f/0xc6
 [<c1006778>] do_softirq+0x1f/0xc6
 [<c1004ea5>] restore_nocheck_notrace+0xe/0xf
 [<c103080b>] search_exception_tables+0x14/0x25
 [<c1017f9f>] fixup_exception+0xb/0x20
 [<c1215c95>] do_general_protection+0x11c/0x16f
 [<c114a90d>] evtchn_do_upcall+0x5f/0x97
 [<c1005006>] hypervisor_callback+0x46/0x50
 [<c1215b79>] do_general_protection+0x0/0x16f
 [<c100626f>] do_iret_error+0x0/0xb1
 [<c121577d>] error_code+0x35/0x3c
 =======================

-----Original Message-----
From: Formoso, Travis 
Sent: Monday, April 16, 2007 10:55 AM
To: xen-users
Subject: [Xen-users] Xen servers not responsive

Hello,

Currently am using 2.6.19-1.2911.6.5.fc6xen version of the kernel because the newest version was giving us problems. However with this one we are running these domains:

Name                                      ID Mem(MiB) VCPUs State   Time(s)
Domain-0                                   0     2307     2 r-----   4520.9
mars                                      10     1511     1 -b----    174.0
monitoring                                14      229     1 -b----     12.1

The problem we are experiencing is after about an hour the servers do not respond. We have to do an xm destroy and then create to get them to work again. Is this a known issue and what could be possible fixes for the problem?

Thank you,

Travis




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