On Fri, Jan 11, 2013 at 03:09:52PM -0500, Glen Barber wrote: > Hi, > > I'm running a relatively recent -CURRENT: > > root_at_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_at_nucleus:/usr/obj/usr/src/sys/NUCLEUS amd64 > > 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. > > Below follows kgdb session and hopefully useful information. Any advice > on how to further debug this would be appreciated. > > Glen > > > Script started on Fri Jan 11 14:58:16 2013 > root_at_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 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 "amd64-marcel-freebsd"... > > Unread portion of the kernel message buffer: > panic: Unknown caching mode 8198 > > cpuid = 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%..91% > > 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 /bootdir/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 /bootdir/boot/kernel/linux.ko.symbols...done. > done. > Loaded symbols for /boot/kernel/linux.ko > Reading symbols from /boot/kernel/coretemp.ko...Reading symbols from /bootdir/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 /bootdir/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 /bootdir/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 /bootdir/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/boot/kernel/pf.ko.symbols...done. > done. > Loaded symbols for /boot/kernel/pf.ko > Reading symbols from /boot/kernel/i915kms.ko...Reading symbols from /bootdir/boot/kernel/i915kms.ko.symbols...done. > done. > Loaded symbols for /boot/kernel/i915kms.ko > Reading symbols from /boot/kernel/iicbb.ko...Reading symbols from /bootdir/boot/kernel/iicbb.ko.symbols...done. > done. > Loaded symbols for /boot/kernel/iicbb.ko > Reading symbols from /boot/kernel/iicbus.ko...Reading symbols from /bootdir/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=<value optimized out>) at pcpu.h:229 > 229 __asm("movq %%gs:%1,%0" : "=r" (td) > (kgdb) bt > #0 doadump (textdump=<value optimized out>) at pcpu.h:229 > #1 0xffffffff805cb724 in kern_reboot (howto=260) at /usr/src/sys/kern/kern_shutdown.c:446 > #2 0xffffffff805cbba5 in panic (fmt=<value optimized out>) at /usr/src/sys/kern/kern_shutdown.c:753 > #3 0xffffffff80879748 in pmap_cache_bits (mode=<value optimized out>, is_pde=<value optimized out>) > at /usr/src/sys/amd64/amd64/pmap.c:863 > #4 0xffffffff80880fb4 in pmap_enter (pmap=0xfffffe01bfa66440, va=34636066816, access=<value optimized out>, > m=0xfffffe023dfc1b70, prot=<value optimized out>, wired=<value optimized out>) > at /usr/src/sys/amd64/amd64/pmap.c:3456 > #5 0xffffffff8084ed25 in vm_fault_hold (map=0xfffffe01bfa66310, vaddr=34636066816, fault_type=1 '\001', > fault_flags=<value optimized out>, m_hold=0x0) at /usr/src/sys/vm/vm_fault.c:914 > #6 0xffffffff8084f8d3 in vm_fault (map=0xfffffe01bfa66310, vaddr=34636066816, > fault_type=<value optimized out>, fault_flags=0) at /usr/src/sys/vm/vm_fault.c:224 > #7 0xffffffff8088593a in trap_pfault (frame=0xffffff8239b37ac0, usermode=1) > at /usr/src/sys/amd64/amd64/trap.c:756 > #8 0xffffffff80886184 in trap (frame=0xffffff8239b37ac0) at /usr/src/sys/amd64/amd64/trap.c:363 > #9 0xffffffff8086f853 in calltrap () at /usr/src/sys/amd64/amd64/exception.S:228 > #10 0x000000080b0f2200 in ?? () > Previous frame inner to this frame (corrupt stack?) > (kgdb) frame 3 > #3 0xffffffff80879748 in pmap_cache_bits (mode=<value optimized out>, is_pde=<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 > 862 if (mode < 0 || mode >= PAT_INDEX_SIZE || pat_index[mode] < 0) > 863 panic("Unknown caching mode %d\n", mode); > 864 > 865 /* The PAT bit is different for PTE's and PDE's. */ > 866 pat_flag = is_pde ? PG_PDE_PAT : PG_PTE_PAT; > 867 > (kgdb) frame 4 > #4 0xffffffff80880fb4 in pmap_enter (pmap=0xfffffe01bfa66440, va=34636066816, access=<value optimized out>, > m=0xfffffe023dfc1b70, prot=<value optimized out>, wired=<value optimized out>) > at /usr/src/sys/amd64/amd64/pmap.c:3456 > 3456 newpte |= pmap_cache_bits(m->md.pat_mode, 0); > (kgdb) p *m > $1 = {pageq = {tqe_next = 0x0, tqe_prev = 0xffffffff80d2f1b8}, listq = {tqe_next = 0x0, > tqe_prev = 0xfffffe023dfc1b08}, left = 0xfffffe023dfc1af8, right = 0x0, object = 0xfffffe00219a93a0, > pindex = 2905, phys_addr = 8809881600, md = {pv_list = {tqh_first = 0x0, tqh_last = 0xfffffe023dfc1bb8}, > pat_mode = 8198}, queue = 255 '?', segind = 10 '\n', hold_count = 0, order = 13 '\r', pool = 0 '\0', > cow = 0, wire_count = 0, aflags = 0 '\0', oflags = 1 '\001', flags = 0, act_count = 0 '\0', busy = 0 '\0', > valid = 255 '?', dirty = 0 '\0'} > (kgdb) list *0xffffffff80880fb4 > 0xffffffff80880fb4 is in pmap_enter (/usr/src/sys/amd64/amd64/pmap.c:3461). > 3456 newpte |= pmap_cache_bits(m->md.pat_mode, 0); > 3457 > 3458 mpte = NULL; > 3459 > 3460 lock = NULL; > 3461 rw_rlock(&pvh_global_lock); > 3462 PMAP_LOCK(pmap); > 3463 > 3464 /* > 3465 * In the case that a page table page is not > (kgdb) root_at_nucleus:/usr/obj/usr/src/sys/NUCLEUS # ^D > > 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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