Re: BUG: soft lockup - is this XFS problem?

Christoph Hellwig
2009-01-03T21:45:07Z

On Tue, Dec 30, 2008 at 05:23:33AM +0100, Nick Piggin wrote:
> On Tue, Dec 23, 2008 at 12:12:59PM -0500, Christoph Hellwig wrote:
> >
> > Nick, I've seen various reports like this by Roman. It seems to be
> > caused by an interaction of the lockless pagecache with the xfs
> > I/O code. Any idea what might be wrong here:
>
> Hmm, it could get into a loop here if there is a page in the pagecache
> with a zero refcount, which might be a problem with XFS... other looping
> conditions might indicate a problem iwth lockless pagecache or radix
> tree. It would be very helpful to know what condition it is looping on...

See http://oss.sgi.com/bugzilla/show_bug.cgi?id=805