Robin Humble 写道: > On Thu, May 15, 2008 at 08:23:20AM -0400, Aaron Knister wrote: > >> Ah! That would make a lot of sense. echoing 0 to statahead_count doesn't >> really do anything other than hang my session. Thanks! >> > > I think the hang echo'ing into /proc is another bug, but yeah, deal > with the big ones first :-) > > ah! little issue for that, will fix it soon.
Regards! -- Fan Yong > cheers, > robin > > >> -Aaron >> >> On May 15, 2008, at 4:36 AM, Yong Fan wrote: >> >> >>> Robin Humble ??????: >>> >>>> 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 > _______________________________________________ Lustre-discuss mailing list [email protected] http://lists.lustre.org/mailman/listinfo/lustre-discuss
