[Linux-cluster] GFS bug with fcntl/flock ?

[Robert Hurst]

Hi Bob,

Was this the information you were looking for?  Short of writing my own,
is there any test suite I can execute to test functionality?


On Wed, 2006-10-11 at 09:24 -0400, Robert Hurst wrote:

> RHEL 4 U4 on dual AMD Opteron servers.  I don't believe this is an
> issue, but none of the Software Compatibility packages were installed
> either.  Thanks.
> 
> ClusterSuite:
> ccs-1.0.7-0.src.rpm             ipvsadm-1.24-6.src.rpm
> cman-1.0.11-0.src.rpm           magma-1.0.6-0.src.rpm
> cman-kernel-2.6.9-45.5.src.rpm  magma-plugins-1.0.6-0.src.rpm
> dlm-1.0.1-1.src.rpm             perl-Net-Telnet-3.03-3.noarch.rpm
> dlm-kernel-2.6.9-42.13.src.rpm  piranha-0.8.2-1.src.rpm
> fence-1.32.25-1.src.rpm         rgmanager-1.9.53-0.src.rpm
> gulm-1.0.7-0.src.rpm
> system-config-cluster-1.0.25-1.0.src.rpm
> iddev-2.0.0-3.src.rpm
> 
> GFS:
> GFS-6.1.6-1.src.rpm            gnbd-kernel-2.6.9-9.44.src.rpm
> GFS-kernel-2.6.9-58.3.src.rpm  libsepol-devel-1.1.1-2.x86_64.rpm
> gnbd-1.0.7-0.src.rpm           lvm2-cluster-2.02.06-7.0.RHEL4.src.rpm
> 
> 
> On Wed, 2006-10-11 at 08:20 -0500, Robert Peterson wrote: 
> 
> > Robert Hurst wrote:
> > > I am running InterSystems Caché 5.0.19 for AMD64, and an strace output 
> > > from their utility reveals a problem with fcntl/flock on the GFS 
> > > filesystem (mount -t gfs /dev/VGSHARE/lvol0 /usr/local):
> > >
> > >     open("/usr/local/etc/cachesys/cache.reg", O_RDONLY|O_NONBLOCK) = 3
> > >     fcntl(3, F_SETLKW, {type=F_RDLCK, whence=SEEK_SET, start=0,
> > >     len=0}) = -1 ENOLCK (No locks available)
> > >
> > >
> > > When I put their files on an ordinary ext3 filesystem, all works fine:
> > >
> > >     open("/usr/local/etc/cachesys/cache.reg", O_RDONLY|O_NONBLOCK) = 3
> > >     fcntl(3, F_SETLKW, {type=F_RDLCK, whence=SEEK_SET, start=0,
> > >     len=0}) = 0
> > >
> > >
> > > The man page on fcntl states that when flock is setup with 
> > > whence=SEEK_SET, start=0, and len=0, the lock will occur on the entire 
> > > file... so locking zero bytes in this manner is acceptable.  Help?
> 
> 
> 
> > Hi Robert,
> > 
> > What version of the cluster software and GFS are you using?
> > 
> > Regards,
> > 
> > Bob Peterson
> > Red Hat CLuster Suite
> > 
> > --
> > Linux-cluster mailing list
> > Linux-cluster at redhat.com
> > https://www.redhat.com/mailman/listinfo/linux-cluster
> 
> 
> 
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