Re: AFS on FreeBSD 8?
Jan Henrik Sylvester <[email protected]> Thu, 20 May 2010 19:19:52 +0200
| Newsgroups | gmane.os.freebsd.devel.afs |
|---|---|
| Message-ID | <[email protected]> |
On 05/18/10 20:14, Derrick Brashear wrote: > On Tue, May 18, 2010 at 1:54 PM, Jan Henrik Sylvester<[email protected]> wrote: >> On amd64, the listing of the directories was instant unlike on i386. Reading >> (small) files caused no problems, but I was able to crash the machine >> accessing some weird entry (some object that OpenAFS on Linux shows with "?" >> for the file permissions) and -- more realistically -- deadlock all access >> to afs upon trying to copy a large file to afs. > > does > cmdebug (yourhost) > return anything? - change to some afs-directory cmdebug: nothing - change to some afs-directory that uses krb login cmdebug: crashes the machine instantly - repeat both steps after reboot cmdebug: nothing - copying a small file cmdebug: reports something (I lost it, looked as if it was expected) - eventually copying of the small file finished (took very long) cmdebug: nothing - copying a large file cmdebug: nothing - copying takes forever (does nothing after a second, no reading) cmdebug: nothing >>> I expect that you will find AFS more usable if you set >>> kern.smp.disabled=1 in /boot/loader.conf, which will make your machine >>> effectively single-processor. >> >> I just tried that and copying a large file to afs caused a deadlock of afs, >> too. I guess it is not just SMP. The "protocol" above was with SMP enabled. I could repeat it with SMP disabled if you expect anything from it. (I did observe the same behavior with SMP disabled.) On a different machine, I was just changing afs directories and listing them calling cmdebug a few times in between. Nothing happened, but when I came back to the machine a few minutes later, it had deadlocked completely -- without copying data at all. I just found the first machine that I tried to reboot with its stalled copy process is now hanging completely, too. I would have tried to narrow down the circumstances that cause deadlocks, if both of the machines in front of me were not crashing so often... Cheers, Jan Henrik _______________________________________________ [email protected] mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-afs To unsubscribe, send any mail to "[email protected]"