From owner-freebsd-hackers@FreeBSD.ORG  Wed May  7 11:06:18 2003
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Date: Wed, 7 May 2003 11:06:06 -0700 (PDT)
From: Srini K <s_kanduru@yahoo.com>
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Subject: VM Crash
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Hi,

I am running IPSEC on 4.3 system

FreeBSD 4.3-RELEASE #0: Thu Jan 10 06:02:11 PST

and very rarely I see a crash in the vmcode. I think
this is the third time in 2 years. The following is
the stack trace:

panic(c0300c20,4,cf359e0c,c0260a84,c0a15c90) at
panic+0x70
vm_page_remove(c0a15c90,c0a15c90,cf438f00,cf4a5de0,6f4ad8)
at vm_page_remove+0x73
vm_page_rename(c0a15c90,cf4a5de0,4) at
vm_page_rename+0x20
vm_object_collapse(cf4a5de0,cf3411b0,cda8fb00,0,cf359e80)
at vm_object_collapse+0x203
vm_object_deallocate(cf437720) at
vm_object_deallocate+0x15c
vm_map_entry_delete(cda8fb00,cf3411b0,cda8fb00,bfc00000,0)
at vm_map_entry_delete+0x33
vm_map_delete(cda8fb00,0,bfc00000,cda8fb00,1) at
vm_map_delete+0x171
vm_map_remove(cda8fb00,0,bfc00000,cda8fb6c,0,bfc00000)
at vm_map_remove+0x6a
exit1(cda8aba0,0,cf359fa0,c02c3c61,cda8aba0) at
exit1+0x220
exit1(cda8aba0,cf359f80,8058040,8051060,0) at exit1
syscall2(bfbf002f,2f,bfbf002f,0,8051060) at
syscall2+0x1f1
Xint0x80_syscall() at Xint0x80_syscall+0x25


The panic message is:
 vm_page_remove(): page not found in hash

I would appreciate if someone can enlighten me what
causes it. Fortunately the debugger is enabled. If
somebody is interested in getting more information, I
am willing to provide.

Thanks,
Srini.

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