Date: Thu, 11 Dec 2008 18:40:03 GMT From: <mike@nux.co.uk> To: freebsd-i386@FreeBSD.org Subject: Re: i386/129550: crash with PAE kernel Message-ID: <200812111840.mBBIe307022049@freefall.freebsd.org>
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The following reply was made to PR i386/129550; it has been noted by GNATS.
From: <mike@nux.co.uk>
To: <bug-followup@FreeBSD.org>,
"Mike" <mike@nux.co.uk>
Cc:
Subject: Re: i386/129550: crash with PAE kernel
Date: Thu, 11 Dec 2008 18:01:15 -0000
Second crash kgdb info on dump - previously the machine had been up for
about 8 days this time it was over 24hrs - we are going to try with a
generic kernel without PAE to see if this fixes the crashing.
Dec 11 17:16:08 redbus-lingo1950 kernel:
Dec 11 17:16:08 redbus-lingo1950 kernel:
Dec 11 17:16:08 redbus-lingo1950 kernel: Fatal trap 12: page fault while in
kernel mode
Dec 11 17:16:08 redbus-lingo1950 kernel: cpuid = 2; apic id = 02
Dec 11 17:16:08 redbus-lingo1950 kernel: fault virtual address = 0x4
Dec 11 17:16:08 redbus-lingo1950 kernel: fault code = supervisor
read, page not present
Dec 11 17:16:08 redbus-lingo1950 kernel: instruction pointer =
0x20:0xc04c4c4d
Dec 11 17:16:08 redbus-lingo1950 kernel: stack pointer
Dec 11 17:16:08 redbus-lingo1950 kernel: = 0x28:0xf5592a78
Dec 11 17:16:08 redbus-lingo1950 kernel: frame pointer =
0x28:0xf5592a98
Dec 11 17:16:08 redbus-lingo1950 kernel: code segment = base 0x0,
limit 0xfffff, type 0x1b
Dec 11 17:16:08 redbus-lingo1950 kernel: = DPL 0, pres 1, def32 1, gran 1
Dec 11 17:16:08 redbus-lingo1950 kernel: processor eflags = interrupt
en
Dec 11 17:16:08 redbus-lingo1950 kernel: ab
redbus-lingo1950# cd /usr/obj/usr/src/sys/PAE
redbus-lingo1950# kgdb kernel.debug /var/crash/vmcore.1
[GDB will not be able to debug user-mode threads: /usr/lib/libthread_db.so:
Undefined symbol "ps_pglobal_lookup"]
GNU gdb 6.1.1 [FreeBSD]
Copyright 2004 Free Software Foundation, Inc.
GDB is free software, covered by the GNU General Public License, and you are
welcome to change it and/or distribute copies of it under certain
conditions.
Type "show copying" to see the conditions.
There is absolutely no warranty for GDB. Type "show warranty" for details.
This GDB was configured as "i386-marcel-freebsd".
Unread portion of the kernel message buffer:
led, resume, IOPL = 0
current process = 57387 (imap)
trap number = 12
panic: page fault
cpuid = 2
Uptime: 1d2h50m57s
Physical memory: 8175 MB
Dumping 432 MB: 417 401 385 369 353 337 321 305 289 273 257 241 225 209 193
177 161 145 129 113 97 81 65 49 33 17 1
#0 doadump () at pcpu.h:195
195 __asm __volatile("movl %%fs:0,%0" : "=r" (td));
(kgdb)
(kgdb) backtrace
#0 doadump () at pcpu.h:195
#1 0xc04ed227 in boot (howto=260) at /usr/src/sys/kern/kern_shutdown.c:409
#2 0xc04ed4e9 in panic (fmt=Variable "fmt" is not available.
) at /usr/src/sys/kern/kern_shutdown.c:563
#3 0xc072f24c in trap_fatal (frame=0xf5592a38, eva=4)
at /usr/src/sys/i386/i386/trap.c:899
#4 0xc072f4e0 in trap_pfault (frame=0xf5592a38, usermode=0, eva=4)
at /usr/src/sys/i386/i386/trap.c:812
#5 0xc072fe8c in trap (frame=0xf5592a38) at
/usr/src/sys/i386/i386/trap.c:490
#6 0xc071482b in calltrap () at /usr/src/sys/i386/i386/exception.s:139
#7 0xc04c4c4d in knlist_remove_kq (knl=0xcf681ba4, kn=0xcee7e3fc,
knlislocked=0, kqislocked=0) at /usr/src/sys/kern/kern_event.c:1615
#8 0xc04c4d6b in knlist_remove (knl=0xcf681ba4, kn=0xcee7e3fc, islocked=0)
at /usr/src/sys/kern/kern_event.c:1633
#9 0xc05640d9 in filt_vfsdetach (kn=0xcee7e3fc)
at /usr/src/sys/kern/vfs_subr.c:3933
#10 0xc04c602b in kqueue_register (kq=0xd58b5e00, kev=0xf5592b64,
td=0xce54f660, waitok=1) at /usr/src/sys/kern/kern_event.c:956
#11 0xc04c63cc in kern_kevent (td=0xce54f660, fd=13, nchanges=1, nevents=0,
k_ops=0xf5592c60, timeout=0x0) at /usr/src/sys/kern/kern_event.c:673
#12 0xc04c6f3b in kevent (td=0xce54f660, uap=0xf5592cfc)
at /usr/src/sys/kern/kern_event.c:594
#13 0xc072f835 in syscall (frame=0xf5592d38)
at /usr/src/sys/i386/i386/trap.c:1035
#14 0xc0714890 in Xint0x80_syscall () at
/usr/src/sys/i386/i386/exception.s:196
#15 0x00000033 in ?? ()
Previous frame inner to this frame (corrupt stack?)
(kgdb)
(kgdb) list *0x20:0xc04c4c4d
A syntax error in expression, near `:0xc04c4c4d'.
(kgdb) list *0xc04c4c4d
0xc04c4c4d is in knlist_remove_kq (/usr/src/sys/kern/kern_event.c:1615).
1610 if (!kqislocked)
1611 KASSERT((kn->kn_status & (KN_INFLUX|KN_DETACHED)) ==
KN_INFLUX,
1612 ("knlist_remove called w/o knote being KN_INFLUX or already
removed"));
1613 if (!knlislocked)
1614 knl->kl_lock(knl->kl_lockarg);
1615 SLIST_REMOVE(&knl->kl_list, kn, knote, kn_selnext);
1616 kn->kn_knlist = NULL;
1617 if (!knlislocked)
1618 knl->kl_unlock(knl->kl_lockarg);
1619 if (!kqislocked)
(kgdb)
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