Re: [lkp-robot] [x86/kconfig] 81d3871900: BUG:unable_to_handle_kernel

From: Geert Uytterhoeven <geert@linux-m68k.org>
To: Andrew Morton <akpm@linux-foundation.org>
Cc: Linus Torvalds <torvalds@linux-foundation.org>,
	Christopher Lameter <cl@linux.com>,
	Josh Poimboeuf <jpoimboe@redhat.com>,
	kernel test robot <xiaolong.ye@intel.com>,
	Ingo Molnar <mingo@kernel.org>, Andy Lutomirski <luto@kernel.org>,
	Borislav Petkov <bp@alien8.de>, Brian Gerst <brgerst@gmail.com>,
	Denys Vlasenko <dvlasenk@redhat.com>,
	"H. Peter Anvin" <hpa@zytor.com>, Jiri Slaby <jslaby@suse.cz>,
	Mike Galbraith <efault@gmx.de>,
	Peter Zijlstra <peterz@infradead.org>,
	Thomas Gleixner <tglx@linutronix.de>,
	LKML <linux-kernel@vger.kernel.org>, LKP <lkp@01.org>,
	Linux MM <linux-mm@kvack.org>, Pekka Enberg <penberg@kernel.org>,
	David Rientjes <rientjes@google.com>,
	Joonsoo Kim <iamjoonsoo.kim@lge.com>,
	Matt Mackall <mpm@selenic.com>
Subject: Re: [lkp-robot] [x86/kconfig] 81d3871900: BUG:unable_to_handle_kernel
Date: Thu, 12 Oct 2017 21:19:01 +0200	[thread overview]
Message-ID: <CAMuHMdWmp5cJf82d_V8=Kzii9r6oFpDMGitBsLRUMNW2HmZxog@mail.gmail.com> (raw)
In-Reply-To: <20171012114843.d74096014cb88eedbaa7ac70@linux-foundation.org>

On Thu, Oct 12, 2017 at 8:48 PM, Andrew Morton
<akpm@linux-foundation.org> wrote:
> On Thu, 12 Oct 2017 10:54:57 -0700 Linus Torvalds <torvalds@linux-foundation.org> wrote:
>> On Thu, Oct 12, 2017 at 10:05 AM, Christopher Lameter <cl@linux.com> wrote:
>> > On Wed, 11 Oct 2017, Josh Poimboeuf wrote:
>> >
>> >> I failed to add the slab maintainers to CC on the last attempt.  Trying
>> >> again.
>> >
>> > Hmmm... Yea. SLOB is rarely used and tested. Good illustration of a simple
>> > allocator and the K&R mechanism that was used in the early kernels.
>>
>> Should we finally just get rid of SLOB?
>>
>> I'm not happy about the whole "three different allocators" crap. It's
>> been there for much too long, and I've tried to cut it down before.
>> People always protest, but three different allocators, one of which
>> gets basically no testing, is not good.
>
> I am not aware of anyone using slob.  We could disable it in Kconfig
> for a year, see what the feedback looks like.

$ git grep CONFIG_SLOB=y
arch/arm/configs/clps711x_defconfig:CONFIG_SLOB=y
arch/arm/configs/collie_defconfig:CONFIG_SLOB=y
arch/arm/configs/multi_v4t_defconfig:CONFIG_SLOB=y
arch/arm/configs/omap1_defconfig:CONFIG_SLOB=y
arch/arm/configs/pxa_defconfig:CONFIG_SLOB=y
arch/arm/configs/tct_hammer_defconfig:CONFIG_SLOB=y
arch/arm/configs/xcep_defconfig:CONFIG_SLOB=y
arch/blackfin/configs/DNP5370_defconfig:CONFIG_SLOB=y
arch/h8300/configs/edosk2674_defconfig:CONFIG_SLOB=y
arch/h8300/configs/h8300h-sim_defconfig:CONFIG_SLOB=y
arch/h8300/configs/h8s-sim_defconfig:CONFIG_SLOB=y
arch/openrisc/configs/or1ksim_defconfig:CONFIG_SLOB=y
arch/sh/configs/rsk7201_defconfig:CONFIG_SLOB=y
arch/sh/configs/rsk7203_defconfig:CONFIG_SLOB=y
arch/sh/configs/se7206_defconfig:CONFIG_SLOB=y
arch/sh/configs/shmin_defconfig:CONFIG_SLOB=y
arch/sh/configs/shx3_defconfig:CONFIG_SLOB=y
kernel/configs/tiny.config:CONFIG_SLOB=y
$

Gr{oetje,eeting}s,

                        Geert

--
Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@linux-m68k.org

In personal conversations with technical people, I call myself a hacker. But
when I'm talking to journalists I just say "programmer" or something like that.
                                -- Linus Torvalds