Re: NFS issues with recent kernels [long]

["André Berger" <andre.berger-S0/GAf8tV78@public.gmane.org>]

* Trond Myklebust (2009-05-09):
> On Sat, 2009-05-09 at 20:57 +0200, Andr=C3=A9 Berger wrote:
> > * Trond Myklebust (2009-05-08):
> > > On Fri, 2009-05-08 at 22:37 +0200, Andr=C3=A9 Berger wrote:
> > > > * Chuck Lever (2009-05-08):
> > > > > On May 8, 2009, at 3:38 PM, Andr=C3=A9 Berger wrote:
> > > > >> * Andr=C3=A9 Berger (2009-04-21):
> > > > >>> * Chuck Lever (2009-04-20):
> > > > >>>> On Apr 20, 2009, at 5:14 AM, Andr=C3=A9 Berger wrote:
> > > > >>>>> * Chuck Lever (2009-04-17):
> > > > [...]
> > > > > Assuming 192.168.1.8 is your server, frame 79 and 622 report =
=46SINFO =20
> > > > > results:
> > > > >
> > > > > Network File System, FSINFO Reply
> > > > >     [Program Version: 3]
> > > > >     [V3 Procedure: FSINFO (19)]
> > > > >     Status: NFS3_OK (0)
> > > > >     obj_attributes
> > > > >         attributes_follow: no value (0)
> > > > >     rtmax: 16384
> > > > >     rtpref: 16384
> > > > >     rtmult: 4096
> > > > >     wtmax: 16384
> > > > >     wtpref: 16384
> > > > >     wtmult: 4096
> > > > >     dtpref: 4096
> > > > >     maxfilesize: 2194719883264
> > > > >     time delta: 1.000000000 seconds
> > > > >         seconds: 1
> > > > >         nano seconds: 0
> > > > >     Properties: 0x0000001b
> > > > >         1... . =3D SETATTR can set time on server
> > > > >         .1.. . =3D PATHCONF is valid for all files
> > > > >         ...1 . =3D File System supports symbolic links
> > > > >         .... 1 =3D File System supports hard links
> > > > >
> > > > > says your server operating system supports NFS rsize and wsiz=
e maxima of=20
> > > > > 16384 bytes.
> > > > >
> > > > > RFC 1813:
> > > > >> rtmax
> > > > >> The maximum size in bytes of a READ request supported by the=
 server. =20
> > > > >> Any READ with a number greater than rtmax will result in a s=
hort read of=20
> > > > >> rtmax bytes or less.
> > > >=20
> > > > My OS is 2.6.29.2, Debian etch, on a PPC system. I swear I got =
32K
> > > > [rw]size with kernels < 2.6.19, at least "mount" reported them =
as
> > > > such. With recent kernels, "mount" and your analysis agree on j=
ust
> > > > 16K. So, what can I do?
> > >=20
> > > There is nothing the client can do as long as the server says it =
won't
> > > accept NFS requests with read or write sizes > 16k. You therefore=
 need
> > > to fix the server.
> >=20
> > So what can I do to fix this? I've upgraded to nfs-utils-1.1.4 in t=
he
> > meantime, 1.1.5 and both 1.1.6 give me=20
> >=20
> >   make[2]: Entering directory `/tmp/nfs-utils-1.1.5/support/misc'
> >   gcc -DHAVE_CONFIG_H -I. -I../../support/include   -I/usr/include =
 -D_GNU_SOURCE -Wall -Wstrict-prototypes  -pipe -g -O2 -MT tcpwrapper.o=
 -MD -MP -MF .deps/tcpwrapper.Tpo -c -o tcpwrapper.o tcpwrapper.c
> >   tcpwrapper.c: In function =E2=80=98haccess_add=E2=80=99:
> >   tcpwrapper.c:117: warning: implicit declaration of function =E2=80=
=98TAILQ_EMPTY=E2=80=99
> >   tcpwrapper.c:119: error: expected expression before =E2=80=98else=
=E2=80=99
> >   tcpwrapper.c: In function =E2=80=98haccess_lookup=E2=80=99:
> >   tcpwrapper.c:131: warning: implicit declaration of function =E2=80=
=98TAILQ_FOREACH=E2=80=99
> >   tcpwrapper.c:131: error: =E2=80=98list=E2=80=99 undeclared (first=
 use in this function)
> >   tcpwrapper.c:131: error: (Each undeclared identifier is reported =
only once
> >   tcpwrapper.c:131: error: for each function it appears in.)
> >   tcpwrapper.c:131: error: expected =E2=80=98;=E2=80=99 before =E2=80=
=98{=E2=80=99 token
> >   make[2]: *** [tcpwrapper.o] Error 1
> >   make[2]: Leaving directory `/tmp/nfs-utils-1.1.5/support/misc'
> >   make[1]: *** [all-recursive] Error 1
> >   make[1]: Leaving directory `/tmp/nfs-utils-1.1.5/support'
> >   make: *** [all-recursive] Error 1
> >=20
> > with=20
> >=20
> >   ./configure --prefix=3D/usr/local --sysconfdir=3D/etc --with-tcp-=
wrappers=3D/usr/include --with-statedir=3D/var/lib/nfs
> >=20
> > I've already upgraded tcpd to the Lenny version 7.6.q-16 (from
> > source), but that didn't help.=20
> >=20
> > With 1.1.4, I still get 16384 [rw]size while 32768 were requested.=20
>=20
>=20
> If the server is based on a recent Linux kernel, then you should chec=
k
> the value of /proc/fs/nfsd/max_block_size. If it is less than 32k, th=
en
> try increasing it.

Indeed, that does the trick with 2.6.29.3 :)

Thank you very much, everyone!

-Andr=C3=A9

--=20
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tml>