Subject: Re: Quota, Softdeps, and Raid - and the Quality of NetBSD Releases
To: None <netbsd-users@NetBSD.org>
From: Lasse Kliemann <firstname.lastname@example.org>
Date: 09/14/2006 22:57:57
* Manuel Bouyer:::
> On Thu, Sep 14, 2006 at 03:00:43PM +0200, Lasse Kliemann wrote:
> > > This is a symptom of some other bug in the kernel, one I have been
> > > trying to find for months with only limited success.
> > >
> > > Is your system, by any chance, an amd64 machine running a 32-bit (i386)
> > > kernel?
> > Yes! From dmesg:
> > cpu0 at mainbus0: (uniprocessor)
> > cpu0: AMD Unknown K7 (Athlon) (686-class), 1799.90 MHz, id 0x10ff0
> > cpu0: features 78bfbff<FPU,VME,DE,PSE,TSC,MSR,PAE,MCE,CX8,APIC,SEP,MTRR>
> > cpu0: features 78bfbff<PGE,MCA,CMOV,PAT,PSE36,MPC,MMX>
> > cpu0: features 78bfbff<FXSR,SSE,SSE2>
> > cpu0: "AMD Athlon(tm) 64 Processor 3000+"
> > I am using NetBSD/i386.
> > I get a similar error even when sofdeps are off, but quotas
> > are on. It seems to be nearly reproduceable, I just have to
> > unpack a large tar file.
> > Maybe we can solve this thing?
> Well, it seems to be related to amd hardware, and as it's memory corruption
> it's quite hard to find. For the record, I run some heavily loaded servers
> (NFS/samba servers, mail servers) with quota (but without softdep) on
> Intel hardware and never got such a panic.
As Thor suggested to me, I installed an amd64 system on the
machine tonight. The problem still exists. I have only tried
sofdeps plus quota. When I unpack a large tarfile, after a
while the machine reboots. I can see for some seconds a
green message with something that has 'fault trap' in it.
So maybe we should note somewhere that using NetBSD on certain
AMD hardware is not a good idea in the moment, so that other
users are warned? As you said, this will be hard to find, and
so the problem is not likely to go away soon. Or is it not a
problem of NetBSD, and every OS will experience memory
corruption on such a machine? (I'm sorry if this is a silly
All the Best,