Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) client-ip=2620:137:e000::1:20;
Date:   Mon, 7 Nov 2022 12:35:56 +0800
From:   Baoquan He <bhe@redhat.com>
To:     Vlastimil Babka <vbabka@suse.cz>
Cc:     linux-kernel@vger.kernel.org, Dennis Zhou <dennis@kernel.org>,
        Tejun Heo <tj@kernel.org>, Christoph Lameter <cl@linux.com>,
        Andrew Morton <akpm@linux-foundation.org>, linux-mm@kvack.org,
        Pekka Enberg <penberg@kernel.org>,
        David Rientjes <rientjes@google.com>,
        Joonsoo Kim <iamjoonsoo.kim@lge.com>,
        Roman Gushchin <roman.gushchin@linux.dev>,
        Hyeonggon Yoo <42.hyeyoo@gmail.com>
Subject: Re: [PATCH 8/8] mm/slub, percpu: correct the calculation of early
 percpu allocation size
Message-ID: <Y2iLLIL/jBL4dftJ@MiWiFi-R3L-srv>
References: <20221024081435.204970-1-bhe@redhat.com>
 <20221024081435.204970-9-bhe@redhat.com>
 <b3776af5-65c7-62b4-7624-184420d0da63@suse.cz>
MIME-Version: 1.0
Content-Type: text/plain; charset=us-ascii
Content-Disposition: inline
In-Reply-To: <b3776af5-65c7-62b4-7624-184420d0da63@suse.cz>
Precedence: bulk

On 11/06/22 at 09:56pm, Vlastimil Babka wrote:
> On 10/24/22 10:14, Baoquan He wrote:
> > SLUB allocator relies on percpu allocator to initialize its ->cpu_slab
> > during early boot. For that, the dynamic chunk of percpu which serves
> > the early allocation need be large enough to satisfy the kmalloc
> > creation.
> > 
> > However, the current BUILD_BUG_ON() in alloc_kmem_cache_cpus() doesn't
> > consider the kmalloc array with NR_KMALLOC_TYPES length. Fix that
> > with correct calculation.
> > 
> > Signed-off-by: Baoquan He <bhe@redhat.com>
> > Cc: Christoph Lameter <cl@linux.com>
> > Cc: Pekka Enberg <penberg@kernel.org>
> > Cc: David Rientjes <rientjes@google.com>
> > Cc: Joonsoo Kim <iamjoonsoo.kim@lge.com>
> > Cc: Andrew Morton <akpm@linux-foundation.org>
> > Cc: Vlastimil Babka <vbabka@suse.cz>
> > Cc: Roman Gushchin <roman.gushchin@linux.dev>
> > Cc: Hyeonggon Yoo <42.hyeyoo@gmail.com>
> > ---
> >  mm/slub.c | 3 ++-
> >  1 file changed, 2 insertions(+), 1 deletion(-)
> 
> As only slub is touched and there's no prerequsities in the previous
> patches, I took this to the slab tree, branch
> slab/for-6.2/cleanups

Yes, it only changes slub code. Thanks for taking it.

I will resend v2 with the left 7 percpu only patches with update.