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    SubjectRe: 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


    On Sat, 21 Nov 2009, Faidon Liambotis 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 :\

    Justin.


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