Hi Marcelo The following ist the current fstab-line which seems to run smoothly: odo.firefly:/storage/multimedia /multimedia nfs readahead=4,soft,intr,rw,tcp,wsize=32768,rsize=32768,late 0 0 nfsstat -m: odo.firefly:/storage/multimedia on /multimedia nfsv3,tcp,resvport,soft,intr,cto,lockd,sec=sys,acdirmin=3,acdirmax=60,acregmin=5,a cregmax=60,nametimeo=60,negnametimeo=60,rsize=32768,wsize=32768,readdirsi ze=32768,readahead=4,wcommitsize=2798255,timeout=120,retrans=2 Now the bad line (no different appart from the typo) odo.firefly:/storage/multimedia /multimedia nfs readahead=4,soft,intr,rw,tcp,wsize=32767,rsize=32767,late 0 0 which leads to the page-faults. And as you said wsize/rsize gets rounded down to the multiple of 512: odo.firefly:/storage/multimedia on /multimedia nfsv3,tcp,resvport,soft,intr,cto,lockd,sec=sys,acdirmin=3,acdirmax=60,acregmin=5,a cregmax=60,nametimeo=60,negnametimeo=60,rsize=32256,wsize=32256,readdirsi ze=32256,readahead=4,wcommitsize=2798255,timeout=120,retrans=2 I can easily reproduce the pagefault by letting for example multimedia/gpodder write to the nfs. hope this helps, mfg Tobias On Tuesday 21 October 2014 15.45:24 Marcelo Araujo wrote: > Hello Tobias, > > That sounds good, at least you don't have any crash so far. > I agree with you, seems a bug, I'm gonna take a look on that. > > Could you share with me your testbed or how you can reproduce the issue? > > Best Regards, > > 2014-10-21 15:36 GMT+08:00 T.C.Berner <tcberner_at_gmail.com>: > > The system now has an uptime of >24h using NFS heavily. > > > > So wsize/rsize=2^15-1 seems to have been the problem.... which is imho a > > bug therefore. > > > > > > mfg Tobias > > > > 2014-10-21 5:11 GMT+02:00 Marcelo Araujo <araujobsdport_at_gmail.com>: > >> Hello Tibias, > >> > >> Any news? > >> > >> > >> Best Regards, > >> > >> 2014-10-20 20:55 GMT+08:00 Rick Macklem <rmacklem_at_uoguelph.ca>: > >>> Tobias C. Berner wrote: > >>> > Now that I posted it, 32767 should of course be 2^15=32768. Let me > >>> > recheck if it still > >>> > hangs with the correct value. > >>> > > >>> > On Monday 20 October 2014 09.15:39 Tobias C. Berner wrote: > >>> > > Hi Marcelo > >>> > > > >>> > > Yes, I'm using readahead: > >>> > > The mountoptions are > >>> > > "readahead=4,soft,intr,rw,tcp,wsize=32767,rsize=32767,late" > >>> > >>> If you type "nfsstat -m", you will see what is actually getting used. > >>> (I suspect the above rsize/wsize got clipped to 32256 or something like > >>> > >>> that. I think it clips it to a multiple of 512.) > >>> > >>> If rsize/wsize are not a power of 2, there are issues, although I've > >>> never > >>> been able to see why it is broken. Maybe it should clip it to the power > >>> of > >>> 2 below the value, since it causes unexplained problems otherwise. > >>> > >>> rick > >>> > >>> > > mfg Tobias > >>> > > > >>> > > On Monday 20 October 2014 10.41:30 Marcelo Araujo wrote: > >>> > > > Hello Tobias, > >>> > > > > >>> > > > Could you show how you are mount the NFS share? > >>> > > > Are you using 'readahead' option? > >>> > > > > >>> > > > Best Regards, > >>> > > > > >>> > > > 2014-10-19 17:40 GMT+08:00 Tobias C. Berner <tcberner_at_gmail.com>: > >>> > > > > both are at 1100038. > >>> > > > > > >>> > > > > On Sunday 19 October 2014 11.12:36 Marcelo Araujo wrote: > >>> > > > > > It is still strange, could you do what Allan said and send us > >>> > > > > > the > >>> > > > > > result > >>> > > > > > >>> > > > > in > >>> > > > > > >>> > > > > > case you are not sure you have world and kernel in the same > >>> > > > > > revision! > >>> > > > > > > >>> > > > > > On Oct 19, 2014 6:48 AM, "Tobias C. Berner" > >>> > > > > > > >>> > > > > > <tcberner_at_gmail.com> wrote: > >>> > > > > > > Hi > >>> > > > > > > > >>> > > > > > > World ist from october 16, installed world and kernel then. > >>> > > > > > > > >>> > > > > > > Kernel was later rebuilt with debug-options. > >>> > > > > > > > >>> > > > > > > > >>> > > > > > > > >>> > > > > > > > >>> > > > > > > > >>> > > > > > > Is the following more sensible? > >>> > > >>> > ################################################## > >>> > > >>> > > > > > > # kgdb NOXON/kernel.debug vmcore.1Received on Tue Oct 21 2014 - 07:10:17 UTC
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