linux-kernel - Re: [External] [PATCH v2 1/4] slub: Restore slub

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Date:   Wed, 26 May 2021 16:20:16 -0400
From:   Stephen Boyd <swboyd@...omium.org>
To:     Muchun Song <songmuchun@...edance.com>,
        Vlastimil Babka <vbabka@...e.cz>
Cc:     Andrew Morton <akpm@...ux-foundation.org>,
        LKML <linux-kernel@...r.kernel.org>,
        Christoph Lameter <cl@...ux.com>,
        Pekka Enberg <penberg@...nel.org>,
        David Rientjes <rientjes@...gle.com>,
        Joonsoo Kim <iamjoonsoo.kim@....com>,
        Linux Memory Management List <linux-mm@...ck.org>,
        Petr Mladek <pmladek@...e.com>, Joe Perches <joe@...ches.com>
Subject: Re: [External] [PATCH v2 1/4] slub: Restore slub_debug=- behavior

Quoting Vlastimil Babka (2021-05-26 03:39:54)
> On 5/26/21 6:04 AM, Muchun Song wrote:
> > On Wed, May 26, 2021 at 10:56 AM Stephen Boyd <swboyd@...omium.org> wrote:
> >>
> >> Passing slub_debug=- on the kernel commandline is supposed to disable
> >> slub debugging. This is especially useful with CONFIG_SLUB_DEBUG_ON
> >> where the default is to have slub debugging enabled in the build. Due to
> >> some code reorganization this behavior was dropped, but the code to make
> >> it work mostly stuck around. Restore the previous behavior by disabling
> >> the static key when we parse the commandline and see that we're trying
> >> to disable slub debugging.
> >>
> >> Cc: Vlastimil Babka <vbabka@...e.cz>
> >> Fixes: e17f1dfba37b ("mm, slub: extend slub_debug syntax for multiple blocks")
>
> Acked-by: Vlastimil Babka <vbabka@...e.cz>
>
> >
> > Is it caused by the commit ca0cab65ea2b ("mm, slub: introduce static
> > key for slub_debug()")?
>
> Yep, looks like a better Fixes: candidate.
>

Fixed it. Thanks.