Messages in this thread | | | From | Neil Brown <> | Date | Mon, 17 Jul 2006 09:23:38 +1000 | Subject | Re: nfs problems with 2.6.18-rc1 |
| |
On Thursday July 13, chexum+dev@gmail.com wrote: > Hi! > > I recently updated two (old) hosts to 2.6.18-rc1, and started noticing > weird things with the nfs mounted /home s.
So this is both the client and the server that you upgraded? That makes is harder to point the finger of blame :-)
> > I frequently face EACCESs where a few minutes ago there wasn't any > problem, and after a retry everything does work again. >
I wonder if that is pointing the finger at
http://www.kernel.org/git/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commitdiff;h=8c7b389e532e964f07057dac8a56c43465544759
as that is a recent change that returns 'EACCES'... but I cannot see that being relevant in this case as it only affects directories.
> > How can I help with tracing this? git bisecting on these machines takes > at least an hour per step, (and no reasonable connectivity either to > compile elsewhere much quicker).
The standard answer for tracing nfs problems if 'tcpdump'. e.g. tcpdump -s 0 -w /tmp/trace host $CLIENT and host $SERVER and port 2049
that should show whether the error is coming from the server, or if the client is generating it all by itself. If you can get a reasonably small '/tmp/trace', compress it and attach it to an email.
Also turn on tracing. Something like: on server echo 32767 > /proc/sys/sunrpc/nfsd_debug on client echo 32767 > /proc/sys/sunrpc/nfs_debug
You can be a bit more selective by only enabling individual flags. For the server, these are in include/linux/nfsd/debug.h You probably want FH, EXPORT AUTH PROC FILEOP
For the client, they are near the end of include/linux/nfs_fs.h Not sure which to choose... maybe just all of them.
NeilBrown - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
| |