Date: Wed, 4 Jan 2006 18:41:53 +0100 From: Alexander Leidinger <Alexander@Leidinger.net> To: freebsd-current@freebsd.org, Randy Bush <randy@psg.com> Subject: Re: Fatal trap 18: integer divide fault while in kernel mode Message-ID: <20060104184153.5c59b660@Magellan.Leidinger.net> In-Reply-To: <17339.64774.805229.732725@roam.psg.com> References: <17339.64774.805229.732725@roam.psg.com>
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On Wed, 4 Jan 2006 06:51:18 -1000
Randy Bush <randy@psg.com> wrote:
> Fatal trap 18: integer divide fault while in kernel mode
> cpuid = 0; apic id = 00
> instruction pointer = 0x20:0xc05e6295
> stack pointer = 0x28:0xc0820d04
> frame pointer = 0x28:0xc0820d14
> code segment = base 0x0, limit 0xfffff, type 0x1b
> = DPL 0, pres 1, def32 1, gran 1
> processor eflags = interrupt enabled, resume, IOPL = 0
> current process = 0 ()
> [thread pid 0 tid 0 ]
> Stopped at vm_coloring_init+0x35: idivl pq_cachenways,%eax
> db> trace
> Tracing pid 0 tid 0 td 0xc0692660
> vm_coloring_init(3,c0820d60,c05e156a,c069d7a4,c065ad0e) at vm_coloring_init+0x35
> vm_pageq_init(c069d7a4,c065ad0e,0,1,c04caf4b) at vm_pageq_init+0x9
> vm_page_startup(c0c3d000,a,c0820d88,c049dbf5,0) at vm_page_startup+0x10a
> vm_mem_init(0,81e000,81ec00,81e000,0) at vm_mem_init+0x18
> mi_startup() at mi_startup+0xb5
> begin() at begin+0x2c
Uhm... this looks like my fault...
Can you please try the attached diff and report back if it works?
If it doesn't work I need more debugging output:
- the content of pq_cachesize and pq_cachenways
- the line where it's panicing
Bye,
Alexander.
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Index: sys/vm/vm_pageq.c
===================================================================
RCS file: /big/FreeBSD-CVS/src/sys/vm/vm_pageq.c,v
retrieving revision 1.19
diff -u -u -r1.19 vm_pageq.c
--- sys/vm/vm_pageq.c 31 Dec 2005 14:39:20 -0000 1.19
+++ sys/vm/vm_pageq.c 4 Jan 2006 17:39:09 -0000
@@ -79,7 +79,7 @@
setPQL2(&pq_cachesize, &pq_cachenways);
- if (pq_cachesize > 0)
+ if (pq_cachesize > 0 && pq_cachenways > 0 && PAGE_SIZE > 1024)
PQ_NUMCOLORS = pq_cachesize / (PAGE_SIZE/1024) / \
pq_cachenways;
else
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