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

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Message-Id: <20171012114843.d74096014cb88eedbaa7ac70@linux-foundation.org>
Date:   Thu, 12 Oct 2017 11:48:43 -0700
From:   Andrew Morton <akpm@...ux-foundation.org>
To:     Linus Torvalds <torvalds@...ux-foundation.org>
Cc:     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@...org,
        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, 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.