linux-kernel - Re: [PROBLEM] 2.6.22-rc2 panics on x86-64 with slub

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Message-ID: <a781481a0705200624q5f62a492o708a2e1c5e8d4c3c@mail.gmail.com>
Date:	Sun, 20 May 2007 18:54:12 +0530
From:	"Satyam Sharma" <satyam.sharma@...il.com>
To:	"Srihari Vijayaraghavan" <sriharivijayaraghavan@...oo.com.au>
Cc:	"Christoph Lameter" <clameter@....com>,
	lkml <linux-kernel@...r.kernel.org>
Subject: Re: [PROBLEM] 2.6.22-rc2 panics on x86-64 with slub

On 5/20/07, Srihari Vijayaraghavan <sriharivijayaraghavan@...oo.com.au> wrote:
> --- Christoph Lameter <clameter@....com> wrote:
> > On Sun, 20 May 2007, Srihari Vijayaraghavan wrote:
> >
> > > Code: 0f ob eb fe 48 8b 1b 48 8b 0x 0f 18 08 48 81 fb 60 cb 51 80
> > > RIP [...] slab_sysfs_init+0x49/0x98
> > > RSP [...]
> > > kernel panic - not syncing: Attempted to kill init!
> >
> > sysfs? If you build without CONFIG_SLUB_DEBUG then SLUB will not use
> > sysfs. You can switch that off in the embedded section.
>
> Fair enough. Would you the section name it appears in 'menuconfig'?
>
> I looked under 'Kernel hacking' section (where the slab debugging appears if
> slab is turned on as 'Debug slab memory allocation') & in the 'General setup'
> section also. I unable to figure out how to disable slub debugging :-(.

SLUB_DEBUG is both "bool if EMBEDDED" and "depends on SLUB", which
means just getting it to be visible in "menuconfig" is quite a challenge :-)

You first need to go into the choice where you pick the allocators ("Choose
allocator --->" which is the last option in General Setup), and then pick
SLUB as your allocator.

Then, from the General Setup again, turn on the "Configure standard
kernel features (for small systems) --->" just above the previous option
and then go into that menu. Now the option to disable SLUB_DEBUG
(which is y by default) becomes visible, so just deselect it to disable it.
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