Ah! That would make a lot of sense. echoing 0 to statahead_count doesn't really do anything other than hang my session. Thanks!
-Aaron On May 15, 2008, at 4:36 AM, Yong Fan wrote: > Robin Humble 写道: >> On Fri, May 02, 2008 at 03:16:31PM -0700, Andreas Dilger wrote: >> >>> On Apr 30, 2008 11:40 -0400, Aaron Knister wrote: >>> >>>> Some more information that might be helpful. There is a >>>> particular code >>>> that one of our users runs. Personally after the trouble this >>>> code has >>>> caused us we'd like to hand him a calculator and disable his >>>> accounts but >>>> sadly that's not an option. Since the time of the hang, there is >>>> what seems >>>> to be one process associated with lustre that is running as the >>>> userid of >>>> the problem user- "ll_sa_15530". A trace of this process in its >>>> current >>>> state shows this - >>>> >>>> Is this a problem with the lustre readahead code? If so would >>>> this fix it? >>>> "echo 0 > /proc/fs/lustre/llite/*/statahead_count " >>>> >>> Yes, this appears to be a statahead problem. There were fixes >>> added to >>> 1.6.5 that should resolve the problems seen with statahead. In >>> the meantime >>> I'd recommend disabling it as you suggest above. >>> >> >> we're seeing the same problem. >> >> I think the workaround should be: >> echo 0 > /proc/fs/lustre/llite/*/statahead_max >> ?? >> >> /proc/fs/lustre/llite/*/statahead_count is -r--r--r-- >> > Sure. > "/proc/fs/lustre/llite/*/statahead_count" is statistics variable. > "/proc/fs/lustre/llite/*/statahead_max " is the switch for > enable/disable directory statahead. > > Regrads! > -- > Fan Yong >> cheers, >> robin >> >> ps. sorry I've been too busy this week to look at the llite_lloop >> stuff. >> _______________________________________________ >> Lustre-discuss mailing list >> [email protected] >> http://lists.lustre.org/mailman/listinfo/lustre-discuss >> > > _______________________________________________ > Lustre-discuss mailing list > [email protected] > http://lists.lustre.org/mailman/listinfo/lustre-discuss Aaron Knister Systems Administrator Center for Research on Environment and Water (301) 595-7000 [EMAIL PROTECTED] _______________________________________________ Lustre-discuss mailing list [email protected] http://lists.lustre.org/mailman/listinfo/lustre-discuss
