On Fri, 11 Mar 2005, Eric Sandeen wrote:
> Robin Humble wrote:
> > Hi,
> >
> > Under what conditions should we be worried about XFS with a kernel
> > compiled with 4k stacks?
> >
> > As we are lazy, we would prefer to run a stock fc3 kernel on dual Xeon
> > 32bit with 3ware hardware SATA RAID - mostly accessed via NFS. No LVM,
> > no ACLs, no software RAID, so nothing too fancy.
> >
> > Is this still asking for trouble?
>
> There are still a few large stack users in xfs even when it's used by
> itself - one that comes to mind is code that runs when you use xfs_fsr
> (hm, I really must check in my fix for that....) And figuring out
> callchain depth is tricky, so hard to say how these things will all add up.
>
> I guess I would suggest that you just test it out on one non-critical
> box, with a "normal" workload for you, and see how it fares. It's
> tight, but in many cases it might be just fine.
>
> > If so, then it's not hard to recompile the fc3 kernel (or a stock
> > kernel) for 8k stacks, just we're not too sure how risky the default
> > fc3 setup is.
>
> You'll know after you figure out how often you hit problems. :)
FWIW, i've been running FC3 on three production servers (perhaps foolishly
so based on the comments above) for about 6 months now withou any
problems. One is running BIND as its only major service (no NFS, LVM or
anything else), 2nd is running apache, mysql & php, 3rd is an rsync backup
server, so its doing alot of disk IO, but not much else. HTH.
--
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Lonni J Friedman netllama@xxxxxxxxxxxxx
LlamaLand http://netllama.linux-sxs.org
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