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    SubjectRe: [feature] automatically detect hung TASK_UNINTERRUPTIBLE tasks
    Arjan van de Ven wrote:
    > On Mon, 3 Dec 2007 11:27:15 +0100
    > Andi Kleen <andi@firstfloor.org> wrote:
    >
    >>> Kernel waiting 2 minutes on TASK_UNINTERRUPTIBLE is certainly
    >>> broken.
    >> What should it do when the NFS server doesn't answer anymore or
    >> when the network to the SAN RAID array located a few hundred KM away
    >> develops some hickup? Or just the SCSI driver decides to do lengthy
    >> error recovery -- you could argue that is broken if it takes longer
    >> than 2 minutes, but in practice these things are hard to test
    >> and to fix.
    >>
    >
    > the scsi layer will have the IO totally aborted within that time anyway;
    > the retry timeout for disks is 30 seconds after all.
    ..

    Mmm.. but the SCSI layer may do many retries, each with 30sec timeouts..


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