Re: [PATCH v2] mm/slab: Improve performance of gathering slabinfo stats

[aruna . ramakrishna]

On 08/16/2016 08:52 AM, Christoph Lameter wrote:
> On Tue, 16 Aug 2016, Joonsoo Kim wrote:
>
> > In SLUB, nr_slabs is manipulated without holding a lock so atomic
> > operation should be used.
>
> It could be moved under the node lock.

Christoph, Joonsoo,

I agree that nr_slabs could be common between SLAB and SLUB, but I think 
that should be a separate patch, since converting nr_slabs to unsigned 
long for SLUB will cause quite a bit of change in mm/slub.c that is not 
related to adding counters to SLAB.

I'll send out an updated slab counters patch with Joonsoo's suggested 
fix tomorrow (nr_slabs will be unsigned long for SLAB only, and there 
will be a separate definition for SLUB), and once that's in, I'll create 
a new patch that makes nr_slabs common for SLAB and SLUB, and also 
converts total_objects to unsigned long. Maybe it can include some more 
cleanup too. Does that sound acceptable?

Thanks,
Aruna