Date: Tue, 15 Jul 2008 22:07:22 +0200 From: Kris Kennaway <kris@FreeBSD.org> To: john@basicnets.co.uk Cc: Kostik Belousov <kostikbel@gmail.com>, freebsd-stable@freebsd.org Subject: Re: Fresh 7.0 Install: Fatal Trap 12 panic when put under load Message-ID: <487D037A.8060208@FreeBSD.org> In-Reply-To: <20080715204703.1xshles8aogwksw4@mail.basicnets.co.uk> References: <854CADB9D95147CAB10BC35887A8E5DC@emea.hubersuhner.net> <20080715102135.GA18082@eos.sc1.parodius.com> <B23D0848E1304F719FEBDC3EDC54B914@emea.hubersuhner.net> <487C8486.1040904@FreeBSD.org> <20080715201915.8m5j3k1lw00k4gck@mail.basicnets.co.uk> <20080715193321.GX17123@deviant.kiev.zoral.com.ua> <20080715204703.1xshles8aogwksw4@mail.basicnets.co.uk>
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john@basicnets.co.uk wrote:
>
>
> >> #9 0xffffffff8067d3ee in uma_zalloc_arg (zone=0xffffff00bfed07e0,
>>> udata=0x0,
>>> flags=-256) at /usr/src/sys/vm/uma_core.c:1835
>> From the frame #9, please do
>> p *zone
>> I am esp. interested in the value of the uz_ctor member.
>>
>> It seems that it becomes corrupted, it value should be 0, as this seems
>> to be ffs inode zone. I suspect that gdb would show 0x6400000000
>> instead.
>
> I am afraid that you may need to spell out each step for me :-(
>
> (kgdb) p *zone
> No symbol "zone" in current context.
> (kgdb) list *0xffffffff8067d3ee
> 0xffffffff8067d3ee is in uma_zalloc_arg (/usr/src/sys/vm/uma_core.c:1835).
> 1830 ("uma_zalloc: Bucket pointer
> mangled."));
> 1831 cache->uc_allocs++;
> 1832 critical_exit();
> 1833 #ifdef INVARIANTS
> 1834 ZONE_LOCK(zone);
> 1835 uma_dbg_alloc(zone, NULL, item);
> 1836 ZONE_UNLOCK(zone);
> 1837 #endif
> 1838 if (zone->uz_ctor != NULL) {
> 1839 if (zone->uz_ctor(item,
> zone->uz_keg->uk_size,
>
> Is this that you were looking for?
Are you sure that is the same source tree you are running? The
7.0-RELEASE source has the zone->uz_ctor on line 1835, which is
consistent with your backtrace.
Kris
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