Date: Sun, 13 Jan 2013 19:56:56 +0200 From: Konstantin Belousov <kostikbel@gmail.com> To: Glen Barber <gjb@FreeBSD.org> Cc: freebsd-current@FreeBSD.org Subject: Re: [panic] Unknown caching mode 8198 in sys/amd64/amd64/pmap.c Message-ID: <20130113175656.GC2561@kib.kiev.ua> In-Reply-To: <20130111200952.GA1359@glenbarber.us> References: <20130111200952.GA1359@glenbarber.us>
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On Fri, Jan 11, 2013 at 03:09:52PM -0500, Glen Barber wrote:
> Hi,
>=20
> I'm running a relatively recent -CURRENT:
>=20
> root@nucleus:/usr/obj/usr/src/sys/NUCLEUS # uname -a
> FreeBSD nucleus 10.0-CURRENT FreeBSD 10.0-CURRENT #50 r244773: Mon Dec
> 31 16:07:53 EST 2012 root@nucleus:/usr/obj/usr/src/sys/NUCLEUS amd64
>=20
> I ran into this panic twice over the past 24 hours. Both times,
> Chromium was the program I was actively using, with a few ssh sessions
> in the background.
>=20
> Below follows kgdb session and hopefully useful information. Any advice
> on how to further debug this would be appreciated.
>=20
> Glen
>=20
>=20
> Script started on Fri Jan 11 14:58:16 2013
> root@nucleus:/usr/obj/usr/src/sys/NUCLEUS # kgdb kernel.debug /var/crash/=
vmcore.6
> 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 conditi=
ons.
> Type "show copying" to see the conditions.
> There is absolutely no warranty for GDB. Type "show warranty" for detail=
s.
> This GDB was configured as "amd64-marcel-freebsd"...
>=20
> Unread portion of the kernel message buffer:
> panic: Unknown caching mode 8198
>=20
> cpuid =3D 3
> KDB: stack backtrace:
> #0 0xffffffff80605a76 at kdb_backtrace+0x66
> #1 0xffffffff805cbbbb at panic+0x13b
> #2 0xffffffff80879748 at pmap_cache_bits+0x58
> #3 0xffffffff80880fb4 at pmap_enter+0xa4
> #4 0xffffffff8084ed25 at vm_fault_hold+0x1a15
> #5 0xffffffff8084f8d3 at vm_fault+0x73
> #6 0xffffffff8088593a at trap_pfault+0x13a
> #7 0xffffffff80886184 at trap+0x4f4
> #8 0xffffffff8086f853 at calltrap+0x8
> Uptime: 1d14h30m4s
> Dumping 4646 out of 7951 MB:..1%..11%..21%..31%..41%..51%..61%..71%..81%.=
=2E91%
>=20
> Reading symbols from /boot/kernel/zfs.ko...Reading symbols from /bootdir/=
boot/kernel/zfs.ko.symbols...done.
> done.
> Loaded symbols for /boot/kernel/zfs.ko
> Reading symbols from /boot/kernel/opensolaris.ko...Reading symbols from /=
bootdir/boot/kernel/opensolaris.ko.symbols...done.
> done.
> Loaded symbols for /boot/kernel/opensolaris.ko
> Reading symbols from /boot/kernel/geom_eli.ko...Reading symbols from /boo=
tdir/boot/kernel/geom_eli.ko.symbols...done.
> done.
> Loaded symbols for /boot/kernel/geom_eli.ko
> Reading symbols from /boot/kernel/linux.ko...Reading symbols from /bootdi=
r/boot/kernel/linux.ko.symbols...done.
> done.
> Loaded symbols for /boot/kernel/linux.ko
> Reading symbols from /boot/kernel/coretemp.ko...Reading symbols from /boo=
tdir/boot/kernel/coretemp.ko.symbols...done.
> done.
> Loaded symbols for /boot/kernel/coretemp.ko
> Reading symbols from /boot/kernel/acpi_video.ko...Reading symbols from /b=
ootdir/boot/kernel/acpi_video.ko.symbols...done.
> done.
> Loaded symbols for /boot/kernel/acpi_video.ko
> Reading symbols from /boot/kernel/sem.ko...Reading symbols from /bootdir/=
boot/kernel/sem.ko.symbols...done.
> done.
> Loaded symbols for /boot/kernel/sem.ko
> Reading symbols from /boot/kernel/acpi_asus.ko...Reading symbols from /bo=
otdir/boot/kernel/acpi_asus.ko.symbols...done.
> done.
> Loaded symbols for /boot/kernel/acpi_asus.ko
> Reading symbols from /boot/kernel/aesni.ko...Reading symbols from /bootdi=
r/boot/kernel/aesni.ko.symbols...done.
> done.
> Loaded symbols for /boot/kernel/aesni.ko
> Reading symbols from /boot/kernel/pf.ko...Reading symbols from /bootdir/b=
oot/kernel/pf.ko.symbols...done.
> done.
> Loaded symbols for /boot/kernel/pf.ko
> Reading symbols from /boot/kernel/i915kms.ko...Reading symbols from /boot=
dir/boot/kernel/i915kms.ko.symbols...done.
> done.
> Loaded symbols for /boot/kernel/i915kms.ko
> Reading symbols from /boot/kernel/iicbb.ko...Reading symbols from /bootdi=
r/boot/kernel/iicbb.ko.symbols...done.
> done.
> Loaded symbols for /boot/kernel/iicbb.ko
> Reading symbols from /boot/kernel/iicbus.ko...Reading symbols from /bootd=
ir/boot/kernel/iicbus.ko.symbols...done.
> done.
> Loaded symbols for /boot/kernel/iicbus.ko
> Reading symbols from /boot/kernel/iic.ko...Reading symbols from /bootdir/=
boot/kernel/iic.ko.symbols...done.
> done.
> Loaded symbols for /boot/kernel/iic.ko
> Reading symbols from /boot/kernel/agp.ko...Reading symbols from /bootdir/=
boot/kernel/agp.ko.symbols...done.
> done.
> Loaded symbols for /boot/kernel/agp.ko
> Reading symbols from /boot/kernel/drm2.ko...Reading symbols from /bootdir=
/boot/kernel/drm2.ko.symbols...done.
> done.
> Loaded symbols for /boot/kernel/drm2.ko
> Reading symbols from /usr/local/libexec/linux_adobe/linux_adobe.ko...done.
> Loaded symbols for /usr/local/libexec/linux_adobe/linux_adobe.ko
> #0 doadump (textdump=3D<value optimized out>) at pcpu.h:229
> 229 __asm("movq %%gs:%1,%0" : "=3Dr" (td)
> (kgdb) bt
> #0 doadump (textdump=3D<value optimized out>) at pcpu.h:229
> #1 0xffffffff805cb724 in kern_reboot (howto=3D260) at /usr/src/sys/kern/=
kern_shutdown.c:446
> #2 0xffffffff805cbba5 in panic (fmt=3D<value optimized out>) at /usr/src=
/sys/kern/kern_shutdown.c:753
> #3 0xffffffff80879748 in pmap_cache_bits (mode=3D<value optimized out>, =
is_pde=3D<value optimized out>)
> at /usr/src/sys/amd64/amd64/pmap.c:863
> #4 0xffffffff80880fb4 in pmap_enter (pmap=3D0xfffffe01bfa66440, va=3D346=
36066816, access=3D<value optimized out>,=20
> m=3D0xfffffe023dfc1b70, prot=3D<value optimized out>, wired=3D<value =
optimized out>)
> at /usr/src/sys/amd64/amd64/pmap.c:3456
> #5 0xffffffff8084ed25 in vm_fault_hold (map=3D0xfffffe01bfa66310, vaddr=
=3D34636066816, fault_type=3D1 '\001',=20
> fault_flags=3D<value optimized out>, m_hold=3D0x0) at /usr/src/sys/vm=
/vm_fault.c:914
> #6 0xffffffff8084f8d3 in vm_fault (map=3D0xfffffe01bfa66310, vaddr=3D346=
36066816,=20
> fault_type=3D<value optimized out>, fault_flags=3D0) at /usr/src/sys/=
vm/vm_fault.c:224
> #7 0xffffffff8088593a in trap_pfault (frame=3D0xffffff8239b37ac0, usermo=
de=3D1)
> at /usr/src/sys/amd64/amd64/trap.c:756
> #8 0xffffffff80886184 in trap (frame=3D0xffffff8239b37ac0) at /usr/src/s=
ys/amd64/amd64/trap.c:363
> #9 0xffffffff8086f853 in calltrap () at /usr/src/sys/amd64/amd64/excepti=
on.S:228
> #10 0x000000080b0f2200 in ?? ()
> Previous frame inner to this frame (corrupt stack?)
> (kgdb) frame 3
> #3 0xffffffff80879748 in pmap_cache_bits (mode=3D<value optimized out>, =
is_pde=3D<value optimized out>)
> at /usr/src/sys/amd64/amd64/pmap.c:863
> 863 panic("Unknown caching mode %d\n", mode);
> (kgdb) list *0xffffffff80879748
> 0xffffffff80879748 is at /usr/src/sys/amd64/amd64/pmap.c:863.
> 858 pmap_cache_bits(int mode, boolean_t is_pde)
> 859 {
> 860 int cache_bits, pat_flag, pat_idx;
> 861 =20
> 862 if (mode < 0 || mode >=3D PAT_INDEX_SIZE || pat_index[mod=
e] < 0)
> 863 panic("Unknown caching mode %d\n", mode);
> 864 =20
> 865 /* The PAT bit is different for PTE's and PDE's. */
> 866 pat_flag =3D is_pde ? PG_PDE_PAT : PG_PTE_PAT;
> 867 =20
> (kgdb) frame 4
> #4 0xffffffff80880fb4 in pmap_enter (pmap=3D0xfffffe01bfa66440, va=3D346=
36066816, access=3D<value optimized out>,=20
> m=3D0xfffffe023dfc1b70, prot=3D<value optimized out>, wired=3D<value =
optimized out>)
> at /usr/src/sys/amd64/amd64/pmap.c:3456
> 3456 newpte |=3D pmap_cache_bits(m->md.pat_mode, 0);
> (kgdb) p *m
> $1 =3D {pageq =3D {tqe_next =3D 0x0, tqe_prev =3D 0xffffffff80d2f1b8}, li=
stq =3D {tqe_next =3D 0x0,=20
> tqe_prev =3D 0xfffffe023dfc1b08}, left =3D 0xfffffe023dfc1af8, right =
=3D 0x0, object =3D 0xfffffe00219a93a0,=20
> pindex =3D 2905, phys_addr =3D 8809881600, md =3D {pv_list =3D {tqh_fir=
st =3D 0x0, tqh_last =3D 0xfffffe023dfc1bb8},=20
> pat_mode =3D 8198}, queue =3D 255 '?', segind =3D 10 '\n', hold_count=
=3D 0, order =3D 13 '\r', pool =3D 0 '\0',=20
> cow =3D 0, wire_count =3D 0, aflags =3D 0 '\0', oflags =3D 1 '\001', fl=
ags =3D 0, act_count =3D 0 '\0', busy =3D 0 '\0',=20
> valid =3D 255 '?', dirty =3D 0 '\0'}
> (kgdb) list *0xffffffff80880fb4
> 0xffffffff80880fb4 is in pmap_enter (/usr/src/sys/amd64/amd64/pmap.c:3461=
).
> 3456 newpte |=3D pmap_cache_bits(m->md.pat_mode, 0);
> 3457 =20
> 3458 mpte =3D NULL;
> 3459 =20
> 3460 lock =3D NULL;
> 3461 rw_rlock(&pvh_global_lock);
> 3462 PMAP_LOCK(pmap);
> 3463 =20
> 3464 /*
> 3465 * In the case that a page table page is not
> (kgdb) root@nucleus:/usr/obj/usr/src/sys/NUCLEUS # ^D
>=20
> Script done on Fri Jan 11 14:58:54 2013
Show the output of p *(struct vm_object *)0xfffffe00219a93a0.
Do you use zfs or drm2/i915 driver ?
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