On Wed, Apr 27, 2005 at 09:19:38PM +0200, Marc Olzheim wrote: > On Wed, Apr 27, 2005 at 03:06:27PM -0400, Brian Fundakowski Feldman wrote: > > > How can I tell whether it uses transactions ? > > > > I am not sure -- it should with NFSv3 though. Does "mount -v" tell > > you anything more detailed? I suppose that nfsstat may also be used > > -- the "commit" count should only increase when it does an NFSv3 > > commit operation. > > > > > The NFS server is mounted with: > > > > > > mount_nfs -c -P -a 0 -r 8192 -w 8192 -i -o rw,noatime,nointr host:/path > > > /nfs/host/path > > > > So the only really visible difference is 6 nfsiod versus 20 nfsiod. I > > think if you increased the nfsiod on that 4.x box to something much > > higher it would deadlock the same, then, assuming that all else is > > equal. > > Well, I took on that challenge and although it seems that the machine > completely hangs itself up for a while, it snaps out of it after it is > done. > > tehethereal tells me it is NFSv3, and the commits increase: > [....]
Alright, thanks for testing. So the same bug exists in 4.x but may not actually deadlock the buffer cache in the same circumstances. If you feel like playing with it anymore, I would expect a certain write block size, maximum nfsiod, and total file size being written wouldn't be too hard to find that would deadlock 4.x, too. -- Brian Fundakowski Feldman \'[ FreeBSD ]''''''''''\ <> [EMAIL PROTECTED] \ The Power to Serve! \ Opinions expressed are my own. \,,,,,,,,,,,,,,,,,,,,,,\ _______________________________________________ [email protected] mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-stable To unsubscribe, send any mail to "[EMAIL PROTECTED]"
