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Bug 740132

Summary: BUG: Kernel soft lockup and unresponsive
Product: Red Hat Enterprise Linux 6 Reporter: Xiaoqing Wei <xwei>
Component: kernelAssignee: Red Hat Kernel Manager <kernel-mgr>
Status: CLOSED DUPLICATE QA Contact: Red Hat Kernel QE team <kernel-qe>
Severity: medium Docs Contact:
Priority: medium    
Version: 6.2CC: juzhang, michen, shuang
Target Milestone: rc   
Target Release: ---   
Hardware: Unspecified   
OS: Unspecified   
Whiteboard:
Fixed In Version: Doc Type: Bug Fix
Doc Text:
Story Points: ---
Clone Of: Environment:
Last Closed: 2011-09-21 04:46:53 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:
Attachments:
Description Flags
host_serial output none

Description Xiaoqing Wei 2011-09-21 03:34:01 UTC 
Description of problem:

BUG: Kernel soft lockup and unresponsive when netperf from host to kvm_guest

Version-Release number of selected component (if applicable):
2.6.32-198.el6.x86_64.debug

How reproducible:
4 / 4

Steps to Reproduce:
1.boot a rhel6.2 kvm guest with 4 nics [virtio_blk,virtio_net]
2.setup guest as a netperf netserver , host as netperf client
3.[on host ]
netperf -t TCP_STREAM -H Guest_ip1 -l 60 -- -m 1500
netperf -t TCP_STREAM -H Guest_ip2 -l 60 -- -m 1500
netperf -t TCP_STREAM -H Guest_ip3 -l 60 -- -m 1500
netperf -t TCP_STREAM -H Guest_ip4 -l 60 -- -m 1500
  
Actual results:
host soft lockup and unresponsive,only serial outputting

Expected results:
Both host and guest run healthy

Additional info:
Host_cpu quad_core
processor	: 3
vendor_id	: GenuineIntel
cpu family	: 6
model		: 23
model name	: Intel(R) Core(TM)2 Quad CPU    Q9400  @ 2.66GHz

Host_ram 8G

qemu-kvm-0.12.1.2-2.190.el6.x86_64
Comment 1 Xiaoqing Wei 2011-09-21 03:37:52 UTC 
Created attachment 524123 [details]
host_serial output
Comment 3 Suqin Huang 2011-09-21 04:46:53 UTC 

*** This bug has been marked as a duplicate of bug 730756 ***