Re: Big SMP machine hangs often [debug included]

From: Alan Cox (alan@lxorguk.ukuu.org.uk)
Date: Wed May 17 2000 - 14:43:53 EDT

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    > - AMI MegaRaid EC9F:1.24 controller with 4 18 GB disks in RAID5 mode
    > - Linux 2.2.13 kernel compiled with gcc 2.7.2.3 and SMP / 2GB support

    Get at least the 1.07b MegaRAID driver and also the 3.10 or higher firmware.

    > solve, or that it is something else. It looks like the kernel gets
    > stuck in add_timer/timer_bh somehow. Note also the strange "buffer hashed"
    > output.

    Adding a timer continually for now or past can cause this hang. Try 2.2.15
    and the delack-5 patch from Andrea. Andrea also did a patch to stop timers
    that get queued this way hanging the box so you can debug it

    Alan

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