2014-10-21 20:48 GMT+08:00 Rick Macklem <rmack...@uoguelph.ca>:

> Marcelo Araujo wrote:
> > Tobias,
> >
> > Thank you very much, it really helps to simulate the problem.
> > I'm gonna try as soon as possible and I will keep you informed.
> >
> You are more than welcome to try and find this. However, I don't think
> folks need to use a non-power of 2 rsize/wsize, so I think I'll change
> the client to clip rsize/wsize to that. (This example was just a typo.)
>

Yes, that would be nice if you can do that.
As seems you gonna take a look on it, I'm gonna move to other things.


>
> Is there anyone out there that thinks having an rsize/wsize that isn't
> a power of 2 is needed?
>

Personally, I can't see where it would be needed.



>
> Thanks, rick
>
> > Best Regards,
> >
> > 2014-10-21 17:10 GMT+08:00 Tobias C. Berner <tcber...@gmail.com>:
> >
> > >  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,acregmax=60,nametimeo=60,negnametimeo=60,rsize=32768,wsize=32768,readdirsize=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,acregmax=60,nametimeo=60,negnametimeo=60,rsize=32256,wsize=32256,readdirsize=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 <tcber...@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
> > > > > <araujobsdp...@gmail.com>:
> > >
> > > > >> Hello Tibias,
> > >
> > > > >>
> > >
> > > > >> Any news?
> > >
> > > > >>
> > >
> > > > >>
> > >
> > > > >> Best Regards,
> > >
> > > > >>
> > >
> > > > >> 2014-10-20 20:55 GMT+08:00 Rick Macklem
> > > > >> <rmack...@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 <
> > > tcber...@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"
> > >
> > > > >>> > > > > >
> > >
> > > > >>> > > > > > <tcber...@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.1
> > >
> > > > >>> > > > > > >
> > >
> > > > >>> > > > > > > Fatal trap 12: page fault while in kernel mode
> > >
> > > > >>> > > > > > >
> > >
> > > > >>> > > > > > > cpuid = 5; apic id = 05
> > >
> > > > >>> > > > > > >
> > >
> > > > >>> > > > > > > fault virtual address = 0xfffffe07d1744000
> > >
> > > > >>> > > > > > >
> > >
> > > > >>> > > > > > > fault code = supervisor write data, page not
> > > > >>> > > > > > > present
> > >
> > > > >>> > > > > > >
> > >
> > > > >>> > > > > > > instruction pointer = 0x20:0xffffffff80d4d58a
> > >
> > > > >>> > > > > > >
> > >
> > > > >>> > > > > > > stack pointer = 0x28:0xfffffe086057f240
> > >
> > > > >>> > > > > > >
> > >
> > > > >>> > > > > > > frame pointer = 0x28:0xfffffe086057f2f0
> > >
> > > > >>> > > > > > >
> > >
> > > > >>> > > > > > > code segment = base 0x0, limit 0xfffff, type 0x1b
> > >
> > > > >>> > > > > > >
> > >
> > > > >>> > > > > > > = DPL 0, pres 1, long 1, def32 0, gran 1
> > >
> > > > >>> > > > > > >
> > >
> > > > >>> > > > > > > processor eflags = interrupt enabled, resume,
> > > > >>> > > > > > > IOPL = 0
> > >
> > > > >>> > > > > > >
> > >
> > > > >>> > > > > > > current process = 6524 (python2.7)
> > >
> > > > >>> > > > > > >
> > >
> > > > >>> > > > > > >
> > >
> > > > >>> > > > > > >
> > >
> > > > >>> > > > > > >
> > >
> > > > >>> > > > > > >
> > >
> > > > >>> > > > > > > (kgdb) bt
> > >
> > > > >>> > > > > > >
> > >
> > > > >>> > > > > > > #0 doadump (textdump=1) at pcpu.h:219
> > >
> > > > >>> > > > > > >
> > >
> > > > >>> > > > > > > #1 0xffffffff80926b6d in kern_reboot (howto=260)
> > > > >>> > > > > > > at
> > >
> > > > >>> > > > > > > /usr/src/sys/kern/kern_shutdown.c:447
> > >
> > > > >>> > > > > > >
> > >
> > > > >>> > > > > > > #2 0xffffffff809270c0 in panic (fmt=<value
> > > > >>> > > > > > > optimized
> > > out>)
> > >
> > > > >>> > > > > > > at
> > >
> > > > >>> > > > > > > /usr/src/sys/kern/kern_shutdown.c:746
> > >
> > > > >>> > > > > > >
> > >
> > > > >>> > > > > > > #3 0xffffffff8035f167 in db_panic (addr=<value
> > > > >>> > > > > > > optimized
> > >
> > > > >>> > > > > > > out>,
> > >
> > > > >>> > > > > > > have_addr=2, count=0, modif=0x0) at
> > >
> > > > >>> > > > > > > /usr/src/sys/ddb/db_command.c:473
> > >
> > > > >>> > > > > > >
> > >
> > > > >>> > > > > > > #4 0xffffffff8035ed7d in db_command
> > > > >>> > > > > > > (cmd_table=0x0) at
> > >
> > > > >>> > > > > > > /usr/src/sys/ddb/db_command.c:440
> > >
> > > > >>> > > > > > >
> > >
> > > > >>> > > > > > > #5 0xffffffff8035eaf4 in db_command_loop () at
> > >
> > > > >>> > > > > > > /usr/src/sys/ddb/db_command.c:493
> > >
> > > > >>> > > > > > >
> > >
> > > > >>> > > > > > > #6 0xffffffff80361600 in db_trap (type=<value
> > > > >>> > > > > > > optimized
> > >
> > > > >>> > > > > > > out>,
> > >
> > > > >>> > > > > > > code=0)
> > >
> > > > >>> > > > >
> > >
> > > > >>> > > > > at
> > >
> > > > >>> > > > >
> > >
> > > > >>> > > > > > > /usr/src/sys/ddb/db_main.c:251
> > >
> > > > >>> > > > > > >
> > >
> > > > >>> > > > > > > #7 0xffffffff80966f01 in kdb_trap (type=12,
> > > > >>> > > > > > > code=0,
> > >
> > > > >>> > > > > > > tf=<value
> > >
> > > > >>> > > > > > > optimized
> > >
> > > > >>> > > > > > > out>) at /usr/src/sys/kern/subr_kdb.c:654
> > >
> > > > >>> > > > > > >
> > >
> > > > >>> > > > > > > #8 0xffffffff80d4fa7c in trap_fatal
> > >
> > > > >>> > > > > > > (frame=0xfffffe086057f190,
> > >
> > > > >>> > > > >
> > >
> > > > >>> > > > > eva=<value
> > >
> > > > >>> > > > >
> > >
> > > > >>> > > > > > > optimized out>) at
> > > > >>> > > > > > > /usr/src/sys/amd64/amd64/trap.c:861
> > >
> > > > >>> > > > > > >
> > >
> > > > >>> > > > > > > #9 0xffffffff80d4fe0c in trap_pfault
> > >
> > > > >>> > > > > > > (frame=0xfffffe086057f190,
> > >
> > > > >>> > > > > > > usermode=<value optimized out>) at
> > >
> > > > >>> > > > > > > /usr/src/sys/amd64/amd64/trap.c:677
> > >
> > > > >>> > > > > > >
> > >
> > > > >>> > > > > > > #10 0xffffffff80d4f42e in trap
> > > > >>> > > > > > > (frame=0xfffffe086057f190)
> > >
> > > > >>> > > > > > > at
> > >
> > > > >>> > > > > > > /usr/src/sys/amd64/amd64/trap.c:426
> > >
> > > > >>> > > > > > >
> > >
> > > > >>> > > > > > > #11 0xffffffff80d33972 in calltrap () at
> > >
> > > > >>> > > > > > > /usr/src/sys/amd64/amd64/exception.S:231
> > >
> > > > >>> > > > > > >
> > >
> > > > >>> > > > > > > #12 0xffffffff80d4d58a in bzero () at
> > >
> > > > >>> > > > > > > /usr/src/sys/amd64/amd64/support.S:53
> > >
> > > > >>> > > > > > >
> > >
> > > > >>> > > > > > > #13 0xffffffff80830463 in ncl_doio
> > > (vp=0xfffff801e7f99938,
> > >
> > > > >>> > > > > > > bp=0xfffffe07c5a168e8, cr=<value optimized out>,
> > > td=<value
> > >
> > > > >>> > > > > > > optimized
> > >
> > > > >>> > > > >
> > >
> > > > >>> > > > > out>,
> > >
> > > > >>> > > > >
> > >
> > > > >>> > > > > > > called_from_strategy=<value optimized out>)
> > >
> > > > >>> > > > > > >
> > >
> > > > >>> > > > > > > at /usr/src/sys/fs/nfsclient/nfs_clbio.c:1648
> > >
> > > > >>> >
> > >
> > > > >>> > _______________________________________________
> > >
> > > > >>> > freebsd-current@freebsd.org mailing list
> > >
> > > > >>> > http://lists.freebsd.org/mailman/listinfo/freebsd-current
> > >
> > > > >>> > To unsubscribe, send any mail to
> > >
> > > > >>> > "freebsd-current-unsubscr...@freebsd.org"
> > >
> > > > >>
> > >
> > > > >> --
> > >
> > > > >>
> > >
> > > > >> --
> > >
> > > > >> Marcelo Araujo (__)ara...@freebsd.org
> > >
> > > > >> \\\'',)http://www.FreeBSD.org <http://www.freebsd.org/> \/ \ ^
> > > > >> Power
> > >
> > > > >> To Server. .\. /_)
> > >
> > >
> > >
> >
> >
> >
> > --
> >
> > --
> > Marcelo Araujo            (__)ara...@freebsd.org
> > \\\'',)http://www.FreeBSD.org <http://www.freebsd.org/>   \/  \ ^
> > Power To Server.         .\. /_)
> > _______________________________________________
> > freebsd-current@freebsd.org mailing list
> > http://lists.freebsd.org/mailman/listinfo/freebsd-current
> > To unsubscribe, send any mail to
> > "freebsd-current-unsubscr...@freebsd.org"
> >
>



-- 

-- 
Marcelo Araujo            (__)ara...@freebsd.org
\\\'',)http://www.FreeBSD.org <http://www.freebsd.org/>   \/  \ ^
Power To Server.         .\. /_)
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