8.0RC2 amd64 - kernel panic running make buildworld

[Kai Gallasch]

Am Tue, 17 Nov 2009 10:32:41 +0200
schrieb Andriy Gapon <avg at icyb.net.ua>:

> on 14/11/2009 11:36 Andriy Gapon said the following:
> > on 14/11/2009 03:21 Kai Gallasch said the following:
> >> Hi. The patch did help for surviving a makeworld.
> >>
> >> But now I have another machine check exception with this server. It
> >> happened with your patch active, and vm.pmap.pg_ps_enabled="1". I
> >> copied data from a remote server by NFS mount to the instable
> >> server. Destination was a local ZFS filesystem.
> >>
> >> ----------------
> >>
> >> sonnenkraft:~ # MCA: CPU 7 UNCOR PCC OVER DTLB L1 error
> >> MCA: Address 0xff800d860000
> > 
> > It's interesting because the same happened to me too, only in my
> > case it was zpool scrub that triggered it.
> > I will try to look into this further.
> > 
> 
> Kai,
> 
> the latest patch in the works, it's against a clean tree:
> 
> diff --git a/sys/amd64/amd64/pmap.c b/sys/amd64/amd64/pmap.c
> index 44b71f3..ff35eb9 100644
> --- a/sys/amd64/amd64/pmap.c
> +++ b/sys/amd64/amd64/pmap.c

Andriy.

I tested this latest patch of yours and until now the server did not
panic any more with superpages enabled. It survived several makeworld
-j8 and also copying many small files over NFS mount to local ZFS. Also
"zfs scrub" did not provoke a panic.

I'll notify you, should a machine check exception occur again.

--Kai.

-- 
For large values of one, one equals two, for small values of two.