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

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Date:   Thu, 27 May 2021 10:51:18 +0800
From:   Muchun Song <songmuchun@...edance.com>
To:     Stephen Boyd <swboyd@...omium.org>
Cc:     Vlastimil Babka <vbabka@...e.cz>,
        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

On Thu, May 27, 2021 at 4:20 AM Stephen Boyd <swboyd@...omium.org> wrote:
>
> 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.

With that fix. Please feel free to add:

Reviewed-by: Muchun Song <songmuchun@...edance.com>

Thanks.