Date: Mon, 5 Mar 2007 18:28:30 +0000 (GMT) From: Gavin Atkinson <gavin.atkinson@ury.york.ac.uk> To: Kostik Belousov <kostikbel@gmail.com> Cc: Peter Losher <plosher@plosh.net>, freebsd-stable@freebsd.org Subject: Re: 'panic: bad pte' error on 6.2-RELEASE (amd64) Message-ID: <20070305182522.P21692@ury.york.ac.uk> In-Reply-To: <20070305100237.GI10453@deviant.kiev.zoral.com.ua> References: <45EBCF4C.9000901@plosh.net> <20070305100237.GI10453@deviant.kiev.zoral.com.ua>
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On Mon, 5 Mar 2007, Kostik Belousov wrote: > 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). Do you know if this patch is likely to fix the other "bad pte" panics that have been seen (usually during process exit())? e.g. http://docs.freebsd.org/cgi/mid.cgi?1148482556.35287.18.camel http://lists.freebsd.org/pipermail/freebsd-current/2004-August/034909.html I have a couple of amd64 machines I'm reluctant to make live until this is sorted... I'll cvsup in the next day or two to see, although it wasn't consistantly reproduceable. Thanks, Gavinhome | help
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