Date: Mon, 15 Aug 2011 16:20:01 +0300 From: Andriy Gapon <avg@FreeBSD.org> To: Steven Hartland <killing@multiplay.co.uk> Cc: freebsd-stable@FreeBSD.org Subject: Re: debugging frequent kernel panics on 8.2-RELEASE Message-ID: <4E491D01.1090902@FreeBSD.org> In-Reply-To: <796FD5A096DE4558B57338A8FA1E125B@multiplay.co.uk> References: <47F0D04ADF034695BC8B0AC166553371@multiplay.co.uk><A71C3ACF01EC4D36871E49805C1A5321@multiplay.co.uk><4E4380C0.7070908@FreeBSD.org><EBC06A239BAB4B3293C28D793329F9CA@multiplay.co.uk> <4E43E272.1060204@FreeBSD.org> <62BF25D0ED914876BEE75E2ADF28DDF7@multiplay.co.uk> <4E440865.1040500@FreeBSD.org> <6F08A8DE780545ADB9FA93B0A8AA4DA1@multiplay.co.uk> <4E441314.6060606@FreeBSD.org> <2C4B0D05C8924F24A73B56EA652FA4B0@multiplay.co.uk> <4E48D967.9060804@FreeBSD.org> <9D034F992B064E8092E5D1D249B3E959@multiplay.co.uk> <4E490DAF.1080009@FreeBSD.org> <796FD5A096DE4558B57338A8FA1E125B@multiplay.co.uk>
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on 15/08/2011 15:51 Steven Hartland said the following:
> ----- Original Message ----- From: "Andriy Gapon" <avg@FreeBSD.org>
>
>
>> on 15/08/2011 13:34 Steven Hartland said the following:
>>> (kgdb) list *0xffffffff8053b691
>>> 0xffffffff8053b691 is in vm_fault (/usr/src/sys/vm/vm_fault.c:239).
>>> 234 /*
>>> 235 * Find the backing store object and offset into it to begin the
>>> 236 * search.
>>> 237 */
>>> 238 fs.map = map;
>>> 239 result = vm_map_lookup(&fs.map, vaddr, fault_type, &fs.entry,
>>> 240 &fs.first_object, &fs.first_pindex, &prot, &wired);
>>> 241 if (result != KERN_SUCCESS) {
>>> 242 if (result != KERN_PROTECTION_FAILURE ||
>>> 243 (fault_flags & VM_FAULT_WIRE_MASK) !=
>>> VM_FAULT_USER_WIRE) {
>>>
>>
>> Interesting... thanks!
>> Can you please also additionally provide (lengthy) output of x/512a
>> 0xffffff8d8f356fb0 ?
>
> Sorry I'm not sure I follow your their?
It seems that you got me correctly :)
> Do you mean any of the following:-
> (kgdb) x/512a
> 0xffffff8d8f35b000: Cannot access memory at address 0xffffff8d8f35b000
>
> (kgdb) list *0xffffff8d8f356fb0
> No source file for address 0xffffff8d8f356fb0.
>
> or:
> (kgdb) x/512a 0xffffff8d8f356fb0
> 0xffffff8d8f356fb0: Cannot access memory at address 0xffffff8d8f356fb0
Can you please try this (the last command) with 0xffffff8d8f357210 instead?
--
Andriy Gapon
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