Kernel panic: select_hpte_slot found entry already valid

Dave C Boutcher sleddog at
Sat Nov 20 06:54:10 EST 2004

This look familiar to anyone?  Legacy iseries error.  I recall
benh was playing around in there last :-)   This is a customer
running Red Hat in production.

"Len Goldenstein" <len at> wrote on 11/15/2004 08:27:17 AM:
> I had the LPAR running fine for quite a while at the RHEL QU2
> 2.4.21-15.EL kernel - no problems with backups at all.
> After running that for a couple weeks, I went back to the
> -20EL kernel and did the backups without the NFS mounts for a week and
> no problems.
> I mounted the NFS file systems (which are other the LPARs on the
> same 820) and the backup ran fine for a few days until this morning.
> The console log showed this:
> Kernel panic: select_hpte_slot found entry already valid
> Rebooting in 180 seconds..
> I did a quick google search and found this:
> It may be a race condition in the ppc64 kernel.  I'm not a
> kernel guy by any means though so maybe you guys will have some
> insight into the problem.
> I put a problem ticket in with RedHat but their support is less
> than stellar.

Dave Boutcher

More information about the Linuxppc64-dev mailing list