Bug 437274

Summary: Soft lockup in force_evtchn_callback on boot
Product: Red Hat Enterprise Linux 5 Reporter: Matthew Booth <mbooth>
Component: kernel-xenAssignee: Xen Maintainance List <xen-maint>
Status: CLOSED CURRENTRELEASE QA Contact: Martin Jenner <mjenner>
Severity: medium Docs Contact:
Priority: medium    
Version: 5.2   
Target Milestone: rc   
Target Release: ---   
Hardware: All   
OS: Linux   
Whiteboard:
Fixed In Version: Doc Type: Bug Fix
Doc Text:
Story Points: ---
Clone Of: Environment:
Last Closed: 2009-02-13 17:59:04 UTC Type: ---
Regression: --- Mount Type: ---
Documentation: --- CRM:
Verified Versions: Category: ---
oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: --- Target Upstream Version:
Embargoed:

Description Matthew Booth 2008-03-13 10:47:14 UTC 
Description of problem:
After upgrading to RHEL 5.2 beta, I get the following on every boot:

BUG: soft lockup - CPU#0 stuck for 61s! [swapper:0]

Pid: 0, comm:              swapper
EIP: 0061:[<c0401227>] CPU: 0
EIP is at 0xc0401227
 EFLAGS: 00000246    Not tainted  (2.6.18-84.el5xen #1)
EAX: 00030001 EBX: 00000000 ECX: 00000000 EDX: 00001008
ESI: c226c0cc EDI: 008b3fe8 EBP: c226c000 DS: 007b ES: 007b
CR0: 8005003b CR2: 092bef6f CR3: 00e91000 CR4: 00002660
 [<c05489fc>] force_evtchn_callback+0xa/0xc
 [<c051d375>] acpi_processor_idle+0x185/0x3bc
 [<c051d1f0>] acpi_processor_idle+0x0/0x3bc
 [<c0403334>] cpu_idle+0xa2/0xbc
 [<c06eb9f5>] start_kernel+0x37a/0x381
 =======================
BUG: soft lockup - CPU#1 stuck for 62s! [swapper:0]

Pid: 0, comm:              swapper
EIP: 0061:[<c0401227>] CPU: 1
ACPI: PCI Interrupt 0000:00:1d.2[C] -> GSI 18 (level, low) -> IRQ 23
PCI: Setting latency timer of device 0000:00:1d.2 to 64
uhci_hcd 0000:00:1d.2: UHCI Host Controller
uhci_hcd 0000:00:1d.2: new USB bus registered, assigned bus number 4
uhci_hcd 0000:00:1d.2: irq 23, io base 0x00001860
usb usb4: configuration #1 chosen from 1 choice
hub 4-0:1.0: USB hub found
hub 4-0:1.0: 2 ports detected
EIP is at 0xc0401227
 EFLAGS: 00000246    Not tainted  (2.6.18-84.el5xen #1)
EAX: 00030001 EBX: 00000000 ECX: 00000000 EDX: 00001008
ESI: c0d81ccc EDI: 008b46ee EBP: c0d81c00 DS: 007b ES: 007b
CR0: 8005003b CR2: 08283a24 CR3: 00713000 CR4: 00002660
 [<c05489fc>] force_evtchn_callback+0xa/0xc
 [<c051d375>] acpi_processor_idle+0x185/0x3bc
 [<c051d1f0>] acpi_processor_idle+0x0/0x3bc
 [<c0403334>] cpu_idle+0xa2/0xbc
 =======================

The system appears fine.

Version-Release number of selected component (if applicable):
2.6.18-84.el5xen

How reproducible:
Always
Comment 1 Bill Burns 2008-04-17 00:59:32 UTC 
This problem should be fixed by a change made to the -87 kernel. Could you try
that or better yet the latest kernel -90. Thanks.
Comment 2 Bill Burns 2009-02-13 17:59:04 UTC 
Closing this as it's been in needinfo for many months and we think it is fixed.