On Wed, Sep 08, 2010 at 10:52:51AM -0600, Tim Gardner wrote: > The solution appears to be to twiddle with > /proc/sys/vm/min_free_kbytes and /proc/sys/vm/drop_caches, though > I'm not sure this addresses the root cause. Perhaps low memory > really is the root cause. > > At any rate, their solution was to set min_free_kbytes to 4GB, and > to 'echo 1 > /proc/sys/vm/drop_caches' whenever free memory fell > below 8GB. Not particularly elegant, but it appears to have stopped > their server from wedging. That does sound like a workaround rather than a fix. Were there any diagnostics left in the logs after the lockups? Could you get sysrq-t dumps and figure out what was waiting on what? If the system was too wedged for any of that to work, would any fo the watchdog deubgging options help? --b. -- To unsubscribe from this list: send the line "unsubscribe linux-nfs" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
