Re: 2.6.21-mm1 and now 2.6.21-git: SLUB Crashes on boot

Christoph Lameter
2007-05-08T23:57:37Z

On Tue, 8 May 2007, Kevin Winchester wrote:

> [ 1.376783] [<ffffffff8067d664>] kernel_init+0xc4/0x2a0
> [ 1.376857] [<ffffffff802080aa>] __switch_to+0x2a/0x2d0
> [ 1.376932] [<ffffffff8020a5d8>] child_rip+0xa/0x12
> [ 1.377006] [<ffffffff8067d5a0>] kernel_init+0x0/0x2a0
> [ 1.377080] [<ffffffff8020a5ce>] child_rip+0x0/0x12
> [ 1.377151]
> [ 1.377221] @@@ SLUB kmalloc-256: Restoring Poison (0x6b) from
> 0xffff810001bdecd0-0xffff810001bdedce
> [ 1.377326] @@@ SLUB kmalloc-256: Restoring Poison (0xa5) from
> 0xffff810001bdedcf-0xffff810001bdedcf
> [ 1.377430] @@@ SLUB: kmalloc-256 slab 0xffff810001061890. Marking all
> objects used.

There is more... The above describes the repair actions that were taken by
SLUB. Poison was restored and then the slab was taken out of circulation
since pointers may still exist that may damage additional objects if used
to store more data.