Private bug reported:
After running for some indeterminate period of time, the 2.6.32-341-ec2
and 2.6.32-342-ec2 kernels stop responding when running on m2.2xlarge
EC2 instances. No console output is emitted. Stack dumps gathered by
examining CPU context information show that all VCPUs are stuck waiting
on spinlocks. This could be a deadlock in the scheduling code.
ProblemType: Bug
DistroRelease: Ubuntu 10.04
Package: linux-image-2.6.32-341-ec2 2.6.32-341.42
ProcVersionSignature: User Name 2.6.32-341.42-ec2 2.6.32.49+drm33.21
Uname: Linux 2.6.32-341-ec2 x86_64
Architecture: amd64
Date: Fri Feb 10 01:56:17 2012
Ec2AMI: ami-55dc0b3c
Ec2AMIManifest: (unknown)
Ec2AvailabilityZone: us-east-1c
Ec2InstanceType: m1.xlarge
Ec2Kernel: aki-427d952b
Ec2Ramdisk: unavailable
ProcEnviron:
LANG=en_US.UTF-8
SHELL=/bin/bash
SourcePackage: linux-ec2
** Affects: linux-ec2 (Ubuntu)
Importance: Undecided
Status: New
** Tags: amd64 apport-bug ec2-images lucid
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https://bugs.launchpad.net/bugs/929941
Title:
Kernel deadlock in scheduler on m2.2xlarge EC2 instance
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