Re: 2.6.17-mm6

[Reuben Farrelly <reuben-lkml@reub.net>]

On 8/07/2006 9:38 a.m., Andrew Morton wrote:
> Reuben Farrelly <reuben-lkml@reub.net> wrote:
> > > The core slab data structures were wrecked.  For kmalloc(), no less. 
> > > Something secretly destroyed your kernel, and it could be anything.  Nice.
> > Having now turned on slab debugging, is it possibly related to this message 
> > which appeared in my log when I booting up earlier?
> >
> > Jul  8 02:49:39 tornado kernel: EXT3-fs: mounted filesystem with ordered data mode.
> > Jul  8 02:49:39 tornado kernel: Adding 497972k swap on /dev/sdc9.  Priority:-1 
> > extents:1 across:497972k
> > Jul  8 02:49:40 tornado kernel: ip_tables: (C) 2000-2006 Netfilter Core Team
> > Jul  8 02:49:40 tornado kernel: Netfilter messages via NETLINK v0.30.
> > Jul  8 02:49:40 tornado kernel: ip_conntrack version 2.4 (4060 buckets, 32480 
> > max) - 288 bytes per conntrack
> > Jul  8 02:49:40 tornado kernel: Slab corruption: start=ffff81003efd7000, len=4096
> > Jul  8 02:49:40 tornado kernel: 170: ff ff ff ff 00 00 00 00 6b 6b 6b 6b 6b 6b 6b 6b
> > Jul  8 02:49:40 tornado kernel: e1000: eth0: e1000_watchdog: NIC Link is Up 1000 
> > Mbps Full Duplex
> > Jul  8 02:49:40 tornado kernel: GRE over IPv4 tunneling driver
>
> Yikes!  Until we fix that there's no point in looking at anything else.
>
> CONFIG_DEBUG_PAGEALLOC would nail this bug in a flash, but x86_64 doesn't
> implement the damn thing :(
>
> So if this is repeatable it would be of some value if you can work out what
> causes it - start by disabling netfilter.

It hasn't come back after a quick reboot, but I'll be more vigilant than usual 
for it.  With that warning above and the nasty crash before that which maybe 
related, I'm thinking that it's not just a one-off thing.

reuben
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