On Tue, 25 Jun 2013 16:02:00 -0400 (EDT) Richard Brittain <[email protected]> wrote:
> we have a strange problem on a large RHEL6 system with AFS home > directories. I'm not even sure if the problem is in the AFS cache > manager or the kernel. It's (almost certainly) us. Anders noted a similar thing in jabber a week or so ago, and it's almost certainly due to the games we have to play with linux dentries. > The problem went away after the last reboot, but very temporarily. > I've tried all the 'fs flush' variants, but nothing changed. Our > other RHEL6/AFS-home machines don't do this, and it has only affected > a small number of users so far. I'm not sure if our flushing commands will clear the relevant things here; you can try 'echo 3 > /proc/sys/vm/drop_caches' which _might_ help clear it up. > Unfortunately the affected machine isn't one we can tinker with > easily. Well, the only way to get more useful information out of this is to generate a vmcore of the machine while you're experiencing the problem, or to run the 'crash' command and examine the various in-memory structures with some specific commands. If you want to do something like that, please say so, and I or someone else can come up with the necessary info. Or if you happen to find out a certain access or directory pattern that creates this situation, that would help. I would assume that it is possible to reach those directories via different paths / by traversing different mountpoints, which is what may be causing the confusion. -- Andrew Deason [email protected] _______________________________________________ OpenAFS-info mailing list [email protected] https://lists.openafs.org/mailman/listinfo/openafs-info
