Date: Sun, 29 Feb 2004 02:55:00 -0800 From: Peter Losher <Peter_Losher@isc.org> To: current@freebsd.org Subject: More spinlock/double fault fun... Message-ID: <200402290255.00447.Peter_Losher@isc.org>
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So, back in late January, I reported issues with updating from 5.1 to 5.2=20
on our quad-Xeon servers, and spinlock issues kept panic'ing the box at=20
random intervals, etc. To make a long story short, I reallocated the=20
traffic going to that box elsewhere, and recompiled the kernel w/=20
WITNESS, and it has been rock solid since (almost three weeks). =20
However, running under the "WITNESS protection program", has serious=20
performance drawbacks, and I would like to see if I can get back to=20
running a WITNESS-free kernel. I tried that when I updated to 5.2.1,=20
but after around 18 hours, it panic'ed again:
=2D -=3D-
=46atal double fault:
eip =3D 0x8063eb08
esp =3D 0xfb12a000
ebp =3D 0xfb12a000
cpuid =3D 1; apic id =3D 01
panic: double fault
cpuid =3D 1;
Debugger("panic")
Stopped at Debugger+0x55: xchgl %ebx,in_Debugger.0
db> tr
Debugger(8085812b,1,8087268e,80939ee8,100) at Debugger+0x55
panic(8087268e,1,0,0,0) at panic+0x156
dblfault_handler(808ecfcc,1,60,8d324000,8090e800) at=20
dblfault_handler+0x8c
db> panic
panic: from debugger
cpuid =3D 1;
boot() called on cpu#1
Uptime: 18h38m1s
=2D -=3D-
Any Ideas? If there is missing information here, let me know as well.
Best Wishes - Peter
=2D --=20
Peter_Losher@isc.org | ISC | OpenPGP Key E8048D08 | "The bits must flow"
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