The following reply was made to PR kern/25285; it has been noted by GNATS.

From: Rui Paulo <rpaulo@NetBSD.org>
To: gnats-bugs@netbsd.org
Cc: 
Subject: Re: kern/25285
Date: Sat, 3 Sep 2005 17:14:34 +0100

 FWIW, I get this panic after performing a 'sync' in ddb from another panic,
 related to NFS. I also get the panic under some load.
 
 (gdb) target kcore netbsd.1.core
 panic: TLB IPI rendezvous failed (mask %x)
 #0  0xc0637000 in ?? ()
 (gdb) bt
 #0  0xc0637000 in ?? ()
 #1  0xc0337e5c in cpu_reboot (howto=256, bootstr=0x0)
     at /home/rpaulo/netbsd/cvs.netbsd.org/src/sys/arch/i386/i386/machdep.c:752
 #2  0xc025b35f in db_sync_cmd (addr=1, have_addr=0, count=0, 
     modif=0xcaf23224 " <EĀ")
     at /home/rpaulo/netbsd/cvs.netbsd.org/src/sys/ddb/db_command.c:755
 #3  0xc025ad17 in db_command (last_cmdp=0xc042cd88, cmd_table=0xc03d0780)
     at /home/rpaulo/netbsd/cvs.netbsd.org/src/sys/ddb/db_command.c:469
 #4  0xc025aa06 in db_command_loop ()
     at /home/rpaulo/netbsd/cvs.netbsd.org/src/sys/ddb/db_command.c:260
 #5  0xc025e15a in db_trap (type=1, code=0)
     at /home/rpaulo/netbsd/cvs.netbsd.org/src/sys/ddb/db_trap.c:101
 #6  0xc0334732 in kdb_trap (type=1, code=0, regs=0xcaf23488)
     at /home/rpaulo/netbsd/cvs.netbsd.org/src/sys/arch/i386/i386/db_interface.c:225
 #7  0xc0343689 in trap (frame=0xcaf23488)
     at /home/rpaulo/netbsd/cvs.netbsd.org/src/sys/arch/i386/i386/trap.c:270
 #8  0xc010bd9e in calltrap ()
 #9  0xc02b2725 in panic (fmt=0xc041ad80 "TLB IPI rendezvous failed (mask %x)")
     at /home/rpaulo/netbsd/cvs.netbsd.org/src/sys/kern/subr_prf.c:228
 #10 0xc0340b97 in pmap_tlb_shootnow (cpumask=3)
     at /home/rpaulo/netbsd/cvs.netbsd.org/src/sys/arch/i386/i386/pmap.c:3639
 #11 0xc033f7e2 in pmap_clear_attrs (pg=0xc09c2700, clearbits=2)
     at /home/rpaulo/netbsd/cvs.netbsd.org/src/sys/arch/i386/i386/pmap.c:3025
 #12 0xc02f2a87 in genfs_putpages (v=0xcaf23700) at machine/pmap.h:427
 #13 0xc02eed52 in VOP_PUTPAGES (vp=0xcadd45fc, offlo=0, offhi=0, flags=17)
     at /home/rpaulo/netbsd/cvs.netbsd.org/src/sys/kern/vnode_if.c:2015
 #14 0xc0228aa2 in ffs_full_fsync (v=0xcaf23830)
     at /home/rpaulo/netbsd/cvs.netbsd.org/src/sys/ufs/ffs/ffs_vnops.c:383
 #15 0xc02282c2 in ffs_fsync (v=0xcaf23830)
     at /home/rpaulo/netbsd/cvs.netbsd.org/src/sys/ufs/ffs/ffs_vnops.c:277
 #16 0xc02ee58e in VOP_FSYNC (vp=0xcadd45fc, cred=0xcaef01a8, flags=0, offlo=0, 
     offhi=0, p=0xcaee14d4)
     at /home/rpaulo/netbsd/cvs.netbsd.org/src/sys/kern/vnode_if.c:782
 #17 0xc0226008 in ffs_sync (mp=<incomplete type>, waitfor=2, cred=0xcaef01a8, 
     p=0xcaee14d4)
     at /home/rpaulo/netbsd/cvs.netbsd.org/src/sys/ufs/ffs/ffs_vfsops.c:1333
 #18 0xc02e4648 in sys_sync (l=0xcaee4190, v=0x0, retval=0x0)
     at /home/rpaulo/netbsd/cvs.netbsd.org/src/sys/kern/vfs_syscalls.c:630
 #19 0xc02e22d5 in vfs_shutdown ()
     at /home/rpaulo/netbsd/cvs.netbsd.org/src/sys/kern/vfs_subr.c:2600
 #20 0xc0337e6d in cpu_reboot (howto=256, bootstr=0x0)
     at /home/rpaulo/netbsd/cvs.netbsd.org/src/sys/arch/i386/i386/machdep.c:738
 #21 0xc025b35f in db_sync_cmd (addr=1, have_addr=0, count=0, 
     modif=0xcaf23950 " <EĀ")
     at /home/rpaulo/netbsd/cvs.netbsd.org/src/sys/ddb/db_command.c:755
 22 0xc025ad17 in db_command (last_cmdp=0xc042cd88, cmd_table=0xc03d0780)
     at /home/rpaulo/netbsd/cvs.netbsd.org/src/sys/ddb/db_command.c:469
 #23 0xc025aa06 in db_command_loop ()
     at /home/rpaulo/netbsd/cvs.netbsd.org/src/sys/ddb/db_command.c:260
 #24 0xc025e15a in db_trap (type=6, code=0)
     at /home/rpaulo/netbsd/cvs.netbsd.org/src/sys/ddb/db_trap.c:101
 #25 0xc0334732 in kdb_trap (type=6, code=0, regs=0xcaf23bb4)
     at /home/rpaulo/netbsd/cvs.netbsd.org/src/sys/arch/i386/i386/db_interface.c:225
 #26 0xc0343689 in trap (frame=0xcaf23bb4)
     at /home/rpaulo/netbsd/cvs.netbsd.org/src/sys/arch/i386/i386/trap.c:270
 #27 0xc010bd9e in calltrap ()
 #28 0xc02ee170 in VOP_LOOKUP (dvp=0xcaddb540, vpp=<incomplete type>, 
     cnp=0xcaf23f08)
     at /home/rpaulo/netbsd/cvs.netbsd.org/src/sys/kern/vnode_if.c:136
 #29 0xc02dd939 in lookup (ndp=0xcaf23ee4)
     at /home/rpaulo/netbsd/cvs.netbsd.org/src/sys/kern/vfs_lookup.c:621
 #30 0xc02dd2f9 in namei (ndp=0xcaf23ee4)
     at /home/rpaulo/netbsd/cvs.netbsd.org/src/sys/kern/vfs_lookup.c:279
 #31 0xc02e542d in change_dir (ndp=0xcaf23ee4, p=0xcaee14d4)
     at /home/rpaulo/netbsd/cvs.netbsd.org/src/sys/kern/vfs_syscalls.c:1069
 #32 0xc02e5319 in sys_chdir (l=0xcaee4190, v=0xcaf23f64, retval=0xcaf23f5c)
     at /home/rpaulo/netbsd/cvs.netbsd.org/src/sys/kern/vfs_syscalls.c:1008
 #33 0xc0342fca in syscall_plain (frame=0xcaf23fa8)
     at /home/rpaulo/netbsd/cvs.netbsd.org/src/sys/arch/i386/i386/syscall.c:160
 
 dmesg is available at http://netbsd-pt.org/dmesg/?search=&id=84#dmesg
 
 		-- Rui Paulo