hello,
I have a big iproblem with the nfs file locking on some 2.6 er kernel
Kernel Server: 2.4.9
Kernel Client: 2.6.7-rc3-bk2
2.6.6-rc3-mm2
2.6.5
mount options :
10.0.0.149:/export /mnt/server nfs rw,auto,soft,bg,timeo=12,retrans=3,in tr,rsize=8192,wsize=8192,mountvers=3,nfsvers=3,udp 0 0
nfs-utils : 1.0.6
Both Server an Client Debian Sarge. Wiht kernel 2.4.21-pre5 the locking
runs very fine against the server.
This little testscript I used ( got it from a friend):
#define _GNU_SOURCE
#include <unistd.h>
#include <stdio.h>
#include <fcntl.h>
#include <string.h>
#include <errno.h>
int main(int c, char **v)
{
for (++v, --c; c--; ++v) {
struct flock lck = {F_RDLCK, SEEK_SET, 0, 0}; /* whole file */
int fd = open(*v, O_RDONLY);
if ( fd < 0 )
fprintf(stderr, "%s: %s\n", *v, strerror(errno));
else {
if ( fcntl(fd, F_SETLK, &lck) < 0 )
fprintf(stderr, "%s[%d]: %s\n", *v, lck.l_pid, strerror(errno));
else
printf("%s..ok\n", *v);
close(fd);
}
}
return 0;
}
The programm hangs after executing ./script testfile.
Ruben
--
Ruben Puettmann
[email protected]
http://www.puettmann.net
P=E5 on , 09/06/2004 klokka 15:17, skreiv Ruben Puettmann:
> hello,
>=20
>=20
> I have a big iproblem with the nfs file locking on some 2.6 er kernel=
=20
>=20
> Kernel Server: 2.4.9
> Kernel Client: 2.6.7-rc3-bk2
> 2.6.6-rc3-mm2
> 2.6.5
<snip>
> This little testscript I used ( got it from a friend):
That script works fine for me: I haven't seen any hangs on locking in
any of the 2.6 series kernels so far.
What does 'rpcinfo -p' show on the client and server?
Cheers,
Trond
On Wed, Jun 09, 2004 at 05:13:43PM -0400, Trond Myklebust wrote:
> P? on , 09/06/2004 klokka 17:03, skreiv Ruben Puettmann:
>
> > attached the strace and one tcpdump from the testprogramm.
>
> According to that tcpdump, the server is denying you the lock because it
> is still in its grace period.
>
> During that period only clients that held locks before the server
> rebooted are allowed to reclaim those locks. Your client will need to
> wait until that grace period is over (usually ~ 1 minute or so).
>
I have done a reboot on teh server ( It was up for over 315 day's ;-( )
now all runs fine seems to be an race condition. I will take a look on
it if this happend again.
Thanks for your help !!
Ruben
--
Ruben Puettmann
[email protected]
http://www.puettmann.net