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Date:      Tue, 06 Feb 2001 15:36:06 -0500
From:      Jim Bloom <bloom@acm.org>
To:        John Baldwin <jhb@FreeBSD.ORG>
Cc:        current@FreeBSD.ORG
Subject:   Re: Kernel Panic from Yesterday's CVSup
Message-ID:  <3A806036.5694FD66@acm.org>
References:  <XFMail.010206110234.jhb@FreeBSD.org>

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Here are the registers (subject to typing errors):

cs	0xc2fb0008
ds	 0xa000010
es	      0x10
fs	      0x18
ss	      0x10
eax	      0x12
ecx	      0x20
edx	0xc00b8f00
ebx	       0x2
esp	0xc2fbee1c
ebp	0xc2fbee28
esi	     0x100
edi	0xc0290990  __set_sysctl_set_sym_sysctl__kern_fscale+0x4
eip	0xc0266fcc  Debugger+44
efl	      0x56

Jim Bloom
bloom@acm.org

John Baldwin wrote:
> 
> On 06-Feb-01 Jim Bloom wrote:
> > The line where I was having the trap is still within cpu_switch (line
> > 236 of swtch.s).
> >
> > I added  WITNESS and INVARIANTS to my kernel and I get a new panic.
> > This time I see:
> >
> > kernel trap 12 with interrupts disabled
> > panic: mutex sched lock recursed at ../../kern/kern_synch.c:918
> >
> > panic()
> > _mtx_assert(c031b6c0,9,c0290990,396,c043b100) at _mtx_assert+0x63
> > mi_switch(c031b6c0,0,c,c24bef08,c02681cd) at mi_switch+0x25
> > sched_ithd(e) at sched_ithd+0xd9
> > Xresume14() at Xresume14+0x8
> > --- interrupt, eip = 0xc02b0008, esp - 0xc2fbeee4, epb = 0xc2feed4 ---
> > __set_sysinit_set_sym_sc_mem_sys_init(c0275020,c02b0008,286,c031b7230,0)
> > at __set_sysinit_set_sym_sc_mem_sys_init+0x644
> >
> > Jim Bloom
> > bloom@acm.org
> 
> Hmmmmm, can you show the registers?  I wonder if we are somehow running a
> process that isn't fully created yet.  Hmm, that shouldn't be a problem
> looking at fork1()..


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