Hi Rafael,
I've been continuing Junien's investigations into this problem. The
machines have had all the BIOS and firmware updates I could find on HP's
website (although in the case of a DL385-G7 the latest appears to be
February 2014!) One of them only lasted a day before crashing again.
So, step 2 was to add "nox2apic intremap=off" to the DL385-G7s. I added
it to only one of them initially. That machine lasted 9 days before we
had another kernel panic ("NMI watchdog: BUG: soft lockup - CPU#27 stuck
for 23s! [migration/27:200]"), but after the panic it seems to have
settled back down again (without any reboot).
I've also added "intremap=no_x2apic_optout" to one of the DL360-G8s
after it crashed a couple of days ago. So far, it's doing ok.
I''m tempted to try upgrading them to linux-image-generic-lts-wily
(currently 4.2.0.18.13) unless there's any information from the current
setup that could be useful.
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https://bugs.launchpad.net/bugs/1505564
Title:
Soft lockup with "block nbdX: Attempted send on closed socket" spam
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