Re: kernel OOPS for XFS in xfs_iget_core (using NFS+SMP+MD)

[Joshua Baker-LePain <jlb17@duke.edu>]

On Wed, 18 May 2005 at 9:52pm, Jakob Oestergaard wrote

> On Wed, May 18, 2005 at 10:59:25AM -0700, Chris Wedgwood wrote:
> > On Wed, May 18, 2005 at 10:38:07AM -0700, Gregory Brauer wrote:
> > 
> > > May 18 02:59:47 violet kernel: xfs_iget_core: ambiguous vns: vp/0xf53f8ac8, invp/0xe49ccc4c
> > 
> > I'm pretty sure it's NFS that aggravates this --- can anyone recall
> > why?
> 
> Not why no - but there where *major* problems with SMP+NFS+XFS up until
> 2.6.11.
> 
> I run 2.6.11(.8/9) on both SMP (dual athlon) and NUMA (64 bit kernel on
> dual opteron) with NFS and XFS and haven't yet seen any problems (knock
> the wood).
> 
> Seriously, any 2.6 earlier than .11 is *unusable* for file serving over
> NFS (at least with XFS which at the moment is the only FS with
> journalled quota so at least for me that's the only option).

Do you have a test case that would show this up?  I've been testing a 
centos-4 based server with the RH-derived 2.6.9-based kernel tweaked to 
disable 4K stacks and enable XFS and haven't run into any issues yet.  
This includes running the parallel IOR benchmark from 10 clients (and 
getting 200MiB/s throughput on reads).

-- 
Joshua Baker-LePain
Department of Biomedical Engineering
Duke University
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