Early results are promising on the no spin lock kernel...we're at 14
instances running it and no lockups (been running it for 3 days). We're
going to see how the weekend goes and if successful, roll it out widely.
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Bugs, whic
Thanks Stefan, we just re-rotated the machine that locked up twice
yesterday with your non-pv-spinlock kernel, we'll keep you updated on
what happens.
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Unfortunately, it looks like we're still freezing up with noautogroup
enabled (set at boot using Grub).
Booted with:
Oct 17 00:07:45 localhost kernel: [0.00] Command line:
root=UUID=3ad27d04-4ecf-493d-bb19-4710c3caf924 ro console=hvc0
noautogroup
> uname -a
Linux moonshine21-readslave-ss
Just as a note, we run the same workload with no issues using Precise on
HVMs, it only reproduces on PV in production, so your findings match our
experience.
Just double checking because I might have missed something--is there an
Ubuntu based setup with auto groups off that doesn't freeze up?
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One more note--I tried stressing out the same instance using bonnie++
and some CPU burning "yes" processes, but it stood up okay. It does seem
somehow related to throwing heavy read traffic at PostgreSQL on these
instances.
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Hi Stefan,
Yes, the same instance that froze (collected it after a reboot).
- looking at the same instance type, does it happen on all of them
sooner or later or are there exceptions?
There is one of our instances of that type that is under the same load
but hasn't frozen in weeks. Since they're
Hi Stefan,
Thanks. We just tried with ami-7dae1b14 and it froze up within a few
minutes of having traffic thrown at the instance.
Are there any other diagnostics we can run either right before or after
it freezes? Thanks.
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Title:
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Titl
AcpiTables: sudo: unable to resolve host moonshine4-readslave-ssdtest2
AlsaDevices:
total 0
crw-rw---T 1 root audio 116, 1 Aug 17 00:39 seq
crw-rw---T 1 root audio 116, 33 Aug 17 00:39 timer
AplayDevices: aplay: device_list:252: no soundcards found...
ApportVersion: 2.0.1-0ubuntu12
Architecture
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