Re: [PATCH 8/8] mm/slub, percpu: correct the calculation of early percpu allocation size

Dennis Zhou
2022-11-07T07:20:30Z

Hi Baoquan,

On Mon, Nov 07, 2022 at 12:35:56PM +0800, Baoquan He wrote:
> 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.
>
>

Don't worry about resending them, I'll pick them up tomorrow morning.

Thanks,
Dennis