Date: Mon, 11 Apr 2011 01:37:16 -0300 From: =?UTF-8?Q?Fl=C3=A1vio?= <fjcosta@gmail.com> To: freebsd-net@freebsd.org Subject: Re: panic: bufwrite: buffer is not busy??? Message-ID: <BANLkTin-xkyTfWdu66dhy5ftqu9iRcCTzg@mail.gmail.com> In-Reply-To: <4D9EFDD3.7070009@rdtc.ru> References: <4D3011DB.9050900@frasunek.com> <4D30458D.30007@sentex.net> <4D309983.70709@rdtc.ru> <201101141437.55421.jhb@freebsd.org> <4D9DA940.4090804@rdtc.ru> <4D9EE3D1.5030608@frasunek.com> <4D9EFDD3.7070009@rdtc.ru>
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I'm having some random panics in HEAD related to mpd/netgraph also. I
thought it would be good to use this thread instead of opening another
one. I felt that Glebius patches helped my boxes (500~600 PPPoE
connections peak) panic less frequently than before, but they still
are panicing randomly. Some patch between 02/04 and 09/09 fixed core
dumps so now I can provide real info on those panics:
GNU gdb 6.1.1 [FreeBSD]
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Type "show copying" to see the conditions.
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This GDB was configured as "i386-marcel-freebsd"...
Unread portion of the kernel message buffer:
Fatal trap 12: page fault while in kernel mode
cpuid = 1; apic id = 01
fault virtual address = 0x24c
fault code = supervisor read, page not present
instruction pointer = 0x20:0xc0793460
stack pointer = 0x28:0xe0f847e4
frame pointer = 0x28:0xe0f84800
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 = 24589 (mpd5)
trap number = 12
panic: page fault
cpuid = 1
Uptime: 1d21h4m36s
Physical memory: 3827 MB
Dumping 269 MB: 254 238 222 206 190 174 158 142 126 110 94 78 62 46 30 14
#0 doadump () at pcpu.h:244
244 pcpu.h: No such file or directory.
in pcpu.h
(kgdb) #0 doadump () at pcpu.h:244
#1 0xc06d0513 in kern_reboot (howto=260)
at /usr/src/sys/kern/kern_shutdown.c:418
#2 0xc06d0778 in panic (fmt=Variable "fmt" is not available.
) at /usr/src/sys/kern/kern_shutdown.c:591
#3 0xc09738fc in trap_fatal (frame=0xe0f847a4, eva=588)
at /usr/src/sys/i386/i386/trap.c:967
#4 0xc0973b50 in trap_pfault (frame=0xe0f847a4, usermode=0, eva=588)
at /usr/src/sys/i386/i386/trap.c:880
#5 0xc0974019 in trap (frame=0xe0f847a4) at /usr/src/sys/i386/i386/trap.c:555
#6 0xc095dbbc in calltrap () at /usr/src/sys/i386/i386/exception.s:168
#7 0xc0793460 in ng_ID2noderef (ID=337310)
at /usr/src/sys/netgraph/ng_base.c:811
#8 0xc0793c9e in ng_name2noderef (here=0xc80e1280, name=0xe0f8485c "[5259e]")
at /usr/src/sys/netgraph/ng_base.c:896
#9 0xc0793fd8 in ng_path2noderef (here=0xc80e1280,
address=0xcda715a0 "[5259e]:", destp=0xe0f84a88, lasthook=0xe0f84a84)
at /usr/src/sys/netgraph/ng_base.c:1674
#10 0xc07944f0 in ng_address_path (here=0xc80e1280, item=0xc7cbebc0,
address=0xcda715a0 "[5259e]:", retaddr=0)
at /usr/src/sys/netgraph/ng_base.c:3532
#11 0xc07a52e9 in ngc_send (so=0xc8136340, flags=0, m=0xce215e00,
addr=0xcdb51610, control=0x0, td=0xc7cafb80)
at /usr/src/sys/netgraph/ng_socket.c:296
#12 0xc07362ba in sosend_generic (so=0xc8136340, addr=0xcdb51610,
uio=0xe0f84bb8, top=0xce215e00, control=0x0, flags=0, td=0xc7cafb80)
at /usr/src/sys/kern/uipc_socket.c:1301
#13 0xc0731b2f in sosend (so=0xc8136340, addr=0xcdb51610, uio=0xe0f84bb8,
top=0x0, control=0x0, flags=0, td=0xc7cafb80)
at /usr/src/sys/kern/uipc_socket.c:1345
#14 0xc0738f20 in kern_sendit (td=0xc7cafb80, s=15, mp=0xe0f84c2c, flags=0,
control=0x0, segflg=UIO_USERSPACE)
at /usr/src/sys/kern/uipc_syscalls.c:781
#15 0xc0739151 in sendit (td=0xc7cafb80, s=15, mp=0xe0f84c2c, flags=0)
at /usr/src/sys/kern/uipc_syscalls.c:717
#16 0xc0739268 in sendto (td=0xc7cafb80, uap=0xe0f84cec)
at /usr/src/sys/kern/uipc_syscalls.c:833
#17 0xc070f6e8 in syscallenter (td=0xc7cafb80, sa=0xe0f84ce4)
at /usr/src/sys/kern/subr_trap.c:344
#18 0xc0973ba4 in syscall (frame=0xe0f84d28)
at /usr/src/sys/i386/i386/trap.c:1082
#19 0xc095dc21 in Xint0x80_syscall ()
at /usr/src/sys/i386/i386/exception.s:266
#20 0x00000033 in ?? ()
Previous frame inner to this frame (corrupt stack?)
(kgdb)
* $FreeBSD: src/sys/netgraph/ng_base.c,v 1.185 2011/03/21 14:18:40
glebius Exp $
Grammar corrections are welcome. Thanks.
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