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Date:      Mon, 5 Mar 2007 12:02:37 +0200
From:      Kostik Belousov <kostikbel@gmail.com>
To:        Peter Losher <plosher@plosh.net>
Cc:        freebsd-stable@freebsd.org
Subject:   Re: 'panic: bad pte' error on 6.2-RELEASE (amd64)
Message-ID:  <20070305100237.GI10453@deviant.kiev.zoral.com.ua>
In-Reply-To: <45EBCF4C.9000901@plosh.net>
References:  <45EBCF4C.9000901@plosh.net>

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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:
>=20
> -=3D-
> TPTE at 0xffff8000040028a0  IS ZERO @ VA 800514000
> panic: bad pte
> cpuid =3D 2
> KDB: stack backtrace:
> panic() at 0xffffffff803fdd03 =3D panic+0x253
> pmap_remove_pages() at 0xffffffff806072a3 =3D pmap_remove_pages+0x283
> exec_new_vmspace() at 0xffffffff803e18e6 =3D exec_new_vmspace+0x216
> exec_elf64_imgact() at 0xffffffff803cbb73 =3D exec_elf64_imgact+0x273
> kern_execve() at 0xffffffff803e2107 =3D kern_execve+0x457
> execve() at 0xffffffff803e2bed =3D execve+0x5d
> syscall() at 0xffffffff8060d141 =3D syscall+0x4d1
> Xfast_syscall() at 0xffffffff805f8128 =3D Xfast_syscall+0xa8
> --- syscall (59, FreeBSD ELF64, execve), rip =3D 0x80069838c, rsp =3D
> 0x7fffffffe7c8, rbp =3D 0x7fffffffecd0 ---
> Uptime: 4d16h55m46s
> -=3D-
>=20
> 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).

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