Re: signal_cache slab corruption.

[Hugh Dickins <hugh@veritas.com>]

On Mon, 13 Mar 2006, Dave Jones wrote:

> I got into the office today to find my workstation that was running
> a kernel based on .16rc5-git9 was totally unresponsive.
> After rebooting, I found this in the logs.
> 
> slab signal_cache: invalid slab found in partial list at ffff8100e3a48080 (11/11).
> slab signal_cache: invalid slab found in partial list at ffff81007ecc6100 (11/11).
> slab: Internal list corruption detected in cache 'signal_cache'(11), slabp ffff810037ec0998(12). Hexdump:
> 
> 000: c0 60 d9 7e 00 81 ff ff 00 61 cc 7e 00 81 ff ff
> 010: a8 09 ec 37 00 81 ff ff a8 09 ec 37 00 81 ff ff
> 020: 0c 00 00 00 00 00 00 00 57 d0 1d 07 01 00 00 00
> 030: 00 00 00 00
> ----------- [cut here ] --------- [please bite here ] ---------
> Kernel BUG at mm/slab.c:2598

Dave, please post the diff -u between your mm/slab.c and the -rc5-git9
mm/slab.c (or any other vanilla version): you've got your own debugging
enabled, which means we can't decipher this properly.  (Not that I'm
expecting to do any better myself than with previous slab corruptions.)

Thanks,
Hugh