Messages in this thread | | | Date | Mon, 17 Jul 2006 12:08:56 +0200 | From | Janos Farkas <> | Subject | Re: nfs problems with 2.6.18-rc1 |
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On 2006-07-17 at 09:23:38, Neil Brown wrote: > On Thursday July 13, chexum+dev@gmail.com wrote: > > 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 :-)
Yeah, smart thing :) Thank you for the response! When I have downgraded the server to 2.6.17, none of those errors happened again. (And I left the setup that way, because some programs have been corrupting their config files because of the spurious read errors -- most notably zsh and firefox.)
> 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.
As far as I can see, that patch is from May 21st, and went in 17-rc5, thus obviously 2.6.17 is newer than that... But a bunch of nfs changes happened in 18-rc1.
> 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.
Well, I tried that, but I couldn't see errors flying on the wire. That would point to flaws in the 18-rc1 client (but only surfacing with an rc1 server?), or in my eyes :)
> 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.
Thanks, that's probably what I've been looking for. I'll try to debug this with a 2.6.18-rc2(client):2.6.17(server) and 2.6.18-rc2(both) setup later this day, but those machines are currently in the process of reorganizing their RAID config :)
-- Janos romfs is at http://romfs.sourceforge.net/ - 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/
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