Hello again,

> Hi,
> 
> On Wed, Jan 04, 2006 at 12:30:39AM +1000, Michael Mansour wrote:
> > > 
> > > do_IRQ: stack overflow: 284
> > >  [<c01078a2>] do_IRQ+0x44/0x130
> > >
> 
> We are currently having some issues on NFS servers running XFS+LVM2+IBMsdd
> 
> i.e. lots of block device layers thus potentially trespassing the 4k 
> limit of the stack.
> 
> We are currently experimenting the following patch:
> 
> http://lwn.net/Articles/150583/
> 
> I can send you the corresponding precompiled kernel for i686 if you like

Just in case this is too big to send via email, maybe you can put this on an
ftp/http site? (or I can make an ftp site available to you which you can
upload to?).

In considering my options also, I looked again at the sl-contrib directory for
SL42
(ftp://ftp.scientificlinux.org/linux/scientific/42/i386/contrib/RPMS/xfs/),
there's also a "dmapi" rpm in there which I haven't installed, I'm not sure if
I need to or not?

I also noticed that there's a Dag Wieers package there:

xfsprogs-2.6.13-3.rf.i386.rpm

which they've made available, but Dag has a more updated one in his repo:

# yum --enablerepo=dag list xfsprogs
Setting up repositories
dag                       100% |=========================| 1.1 kB    00:00
sl-updates                100% |=========================|  951 B    00:00
sl-contrib                                                       951 B 00:00
sl-base                                                         1.1 kB 00:00
sl-errata                                                        951 B 00:00
sl-release                100% |=========================|  951 B    00:00
Reading repository metadata in from local files
primary.xml.gz            100% |=========================| 1.1 MB    00:09
dag       : ################################################## 3171/3171
Added 3 new packages, deleted 0 old in 25.35 seconds
Installed Packages
xfsprogs.i386                            2.6.13-3.rf            installed
Available Packages
xfsprogs.i386                            2.6.13-3.2.el4.rf      dag

Should I just update to that?

And the last thing I guess is, would it be feasible to try a CentOS 4
contributed XFS kernel package? would it even work on SL4?

I've just analysed the work it'll take me to migrate from XFS to ext3, it's a
pain but it'll likely take me half a day per cluster. The features I'll lose
in this migration are speed and on-line resizing (even though ext3 supports
it, people I know that have tested it occasionally have their standby nodes
crash during the process). XFS always works.

Thanks.

Michael.