[Linux-cluster] gfs: Unknown symbol blockdev_direct_IO_cluster_locking on RHEL4

[Jaime Peñalba]

Hi Wendy,

Thanks for the fast answer, i have applied your patch, recompiled and
its working fine now.

The patch was already included on the 2.6.9-22 source, but it isnt
applied by default.

Regards,
Jaime.


2006/2/9, Wendy Cheng <wcheng at redhat.com>:
> On Thu, 2006-02-09 at 00:53 +0100, Jaime Peñalba wrote:
> > Hi,
> >
> > Im getting this error when trying to load gfs module:
> >
> > [root at apache2 ~]# modprobe gfs
> > FATAL: Error inserting gfs
> > (/lib/modules/2.6.9-5.ELsmp/kernel/fs/gfs/gfs.ko): Unknown symbol in
> > module, or unknown parameter (see dmesg)
> > gfs: Unknown symbol blockdev_direct_IO_cluster_locking
>
> This is a patch we added to fix a direct IO deadlock issue. We've tried
> hard not to have dependency on base kernel but simply couldn't do it in
> this case.
>
> The change has to pair with Red Hat RHEL 4 U3 kernel (>=2.6.9-25) that
> is currently in Beta testing.
>
> If you can build your own base kernel, the base kernel patch is placed
> in Red Hat bugzilla 173912 comment 4. If you can't read that bugzilla,
> let me know.
>
> > Can i safely change this?
> >
> > return blockdev_direct_IO_cluster_locking(rw, iocb, inode,
> >                                   inode->i_sb->s_bdev, iov,
> >                                   offset, nr_segs, gb, NULL);
> >
> > with "return 1" or something like? Im going to use always lock_dlm.
>
> If you don't use Direct IO at all, this should be ok.
>
> >
> > Anyway there is any other workaround?
> >
> >
>
> Let us know if above can't work out for you.
>
> -- Wendy
>
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