'panic: bad pte' error on 6.2-RELEASE (amd64)

[Kostik Belousov]

On Mon, Mar 05, 2007 at 12:05:32AM -0800, Peter Losher wrote:
> We recently updated one of our dual Opteron systems (w/ 4GB RAM) from
> 5.5 to 6.2 (amd64 wipe and reinstalled) and about once a week, it panics
> with the below message:
> 
> -=-
> TPTE at 0xffff8000040028a0  IS ZERO @ VA 800514000
> panic: bad pte
> cpuid = 2
> KDB: stack backtrace:
> panic() at 0xffffffff803fdd03 = panic+0x253
> pmap_remove_pages() at 0xffffffff806072a3 = pmap_remove_pages+0x283
> exec_new_vmspace() at 0xffffffff803e18e6 = exec_new_vmspace+0x216
> exec_elf64_imgact() at 0xffffffff803cbb73 = exec_elf64_imgact+0x273
> kern_execve() at 0xffffffff803e2107 = kern_execve+0x457
> execve() at 0xffffffff803e2bed = execve+0x5d
> syscall() at 0xffffffff8060d141 = syscall+0x4d1
> Xfast_syscall() at 0xffffffff805f8128 = Xfast_syscall+0xa8
> --- syscall (59, FreeBSD ELF64, execve), rip = 0x80069838c, rsp =
> 0x7fffffffe7c8, rbp = 0x7fffffffecd0 ---
> Uptime: 4d16h55m46s
> -=-
> 
> I do have a dump, and can make that available if need be.  Has anyone
> encountered this recently and can shed any light on what might be
> causing this?

Did rev. 1.516.2.9 of sys/amd64/amd64/pmap.c changed (or even fixed) the
problem ? (This is the same patch I already sent you).
-------------- next part --------------
A non-text attachment was scrubbed...
Name: not available
Type: application/pgp-signature
Size: 187 bytes
Desc: not available
Url : http://lists.freebsd.org/pipermail/freebsd-stable/attachments/20070305/76b346b7/attachment.pgp