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    SubjectRe: task imap:2958 blocked for more than 120 seconds
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    Am Sonntag 10 Januar 2010 21:19:26 schrieb Chris Mason:
    > On Sun, Jan 10, 2010 at 09:05:46PM +0100, Johannes Hirte wrote:
    > > I've observed this hanging task now several times. Not sure when this
    > > started, but 2.6.32 is affected too, IIRC. I don't have a test pattern
    > > for this. Dovecot imap triggers this from time to time. I've enabled
    > > CONFIG_DETECT_HUNG_TASK now
    >
    > > and got this two tasks which hang:
    > You're stuck on a read, could you please do a sysrq-w when this happens?

    Will do so when it happens again.

    > Also, do you eventually recover or are you stuck forever?

    I didn't wait too long when it happened, so I'm not sure. The longest time
    I've waited was 20-30min, until reboot without recover. So either it's stuck
    forever or it takes really long to recover.

    And one question I have: How do you identify a read in this call trace?

    regards,
    Johannes


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