Bug#557262: 2.6.31+2.6.31.4: XFS - All I/O locks up to D-state after 24-48 hours (sysrq-t+w available) - root cause found = asterisk

[Faidon Liambotis]

reassign 557262 linux-2.6
thanks

Justin,

Justin Piszcz wrote:
>> Justin Piszcz wrote:
>> > Found root cause-- root cause is asterisk PBX software.  I use an
>> SPA3102.
>>> When someone called me, they accidentally dropped the connection, I
>>> called
>>> them back in a short period.  It is during this time (and the last time)
>>> this happened that the box froze under multiple(!) kernels, always when
>>> someone was calling.
>> <snip>
>>> I don't know what asterisk is doing but top did run before the crash
>>> and asterisk was using 100% CPU and as I noted before all other
>>> processes
>>> were in D-state.
>>>
>>> When this bug occurs, it freezes I/O to all devices and the only way to
>>> recover
>>> is to reboot the system.
>> That's obviously *not* the root cause.
>>
>> It's not normal for an application that isn't even privileged to hang
>> all I/O and, subsequently everything on a system.
>>
>> This is almost probably a kernel issue and asterisk just does something
>> that triggers this bug.
>>
>> Regards,
>> Faidon
>>
> 
> It is possible although I tried with several kernels (2.6.30.[0-9] &
> 2.6.31+ (never had a crash with earlier versions, I installed asterisk long
> ago) but it always used to be 1.4.x until recently..  Nasty bug :\
I am reassigning the bug to linux-2.6 since it seems to me this is a
kernel issue. This is, indeed, a nasty bug and I'm not sure you and the
kernel maintainers will have any luck debugging it further; I'll leave
it up to them.

Thanks,
Faidon