We've observed this on another instance running 12.04, ami-3c994355,
with a read-heavy postgresql load.
CPU0
rip: 8105e51a try_to_wake_up+0xca
flags: 1202 i nz
rsp: 880f22deb7d0
rax: 0004 rcx: 880f22deb900 rdx: 0082
rbx: 880c633196e0 rsi:
CPU stack traces from a hi1.4xlarge PV instance running ami-8baa73e2:
CPU 0 is the only running CPU. The others are blocked.
CPU0
rip: 8105711a try_to_wake_up+0xca
flags: 1202 i nz
rsp: 880f22dfc870
rax: 0008 rcx: rdx: 0002
rbx:
Stack traces from a second hi1.4xlarge running ami-8baa73e2:
CPU0
rip: 8105711a try_to_wake_up+0xca
flags: 1202 i nz
rsp: 880f22dfc740
rax: 0006 rcx: 880f22dfc870 rdx: 0082
rbx: 880b13d9 rsi: rdi: 0001
rbp:
Status changed to 'Confirmed' because the bug affects multiple users.
** Changed in: linux-lts-backport-oneiric (Ubuntu)
Status: New = Confirmed
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Due to the nature of the issue encountered, we cannot run this command.
** Changed in: linux (Ubuntu)
Status: Incomplete = Confirmed
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https://bugs.launchpad.net/bugs/1011792
