linux-kernel - Re: [lkp-robot] [x86/kconfig] 81d3871900: BUG:unable_to_handle

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Date:   Thu, 12 Oct 2017 21:19:01 +0200
From:   Geert Uytterhoeven <geert@...ux-m68k.org>
To:     Andrew Morton <akpm@...ux-foundation.org>
Cc:     Linus Torvalds <torvalds@...ux-foundation.org>,
        Christopher Lameter <cl@...ux.com>,
        Josh Poimboeuf <jpoimboe@...hat.com>,
        kernel test robot <xiaolong.ye@...el.com>,
        Ingo Molnar <mingo@...nel.org>,
        Andy Lutomirski <luto@...nel.org>,
        Borislav Petkov <bp@...en8.de>,
        Brian Gerst <brgerst@...il.com>,
        Denys Vlasenko <dvlasenk@...hat.com>,
        "H. Peter Anvin" <hpa@...or.com>, Jiri Slaby <jslaby@...e.cz>,
        Mike Galbraith <efault@....de>,
        Peter Zijlstra <peterz@...radead.org>,
        Thomas Gleixner <tglx@...utronix.de>,
        LKML <linux-kernel@...r.kernel.org>, LKP <lkp@...org>,
        Linux MM <linux-mm@...ck.org>,
        Pekka Enberg <penberg@...nel.org>,
        David Rientjes <rientjes@...gle.com>,
        Joonsoo Kim <iamjoonsoo.kim@....com>,
        Matt Mackall <mpm@...enic.com>
Subject: Re: [lkp-robot] [x86/kconfig] 81d3871900: BUG:unable_to_handle_kernel

On Thu, Oct 12, 2017 at 8:48 PM, Andrew Morton
<akpm@...ux-foundation.org> wrote:
> On Thu, 12 Oct 2017 10:54:57 -0700 Linus Torvalds <torvalds@...ux-foundation.org> wrote:
>> On Thu, Oct 12, 2017 at 10:05 AM, Christopher Lameter <cl@...ux.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@...ux-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