Re: [PATCH v5 14/18] memcg/sl[au]b: shrink dead caches
From: Glauber Costa
Date: Mon Oct 22 2012 - 03:37:34 EST
On 10/19/2012 11:47 PM, Christoph Lameter wrote:
> On Fri, 19 Oct 2012, Glauber Costa wrote:
>> An unlikely branch is used to make sure this case does not affect
>> performance in the usual slab_free path.
>> The slab allocator has a time based reaper that would eventually get rid
>> of the objects, but we can also call it explicitly, since dead caches
>> are not a likely event.
> This is also something that could be done from slab_common since all
> allocators have kmem_cache_shrink and kmem_cache_shrink can be used to
> drain the caches and free up empty slab pages.
The changelog needs to be updated. I updated the code, forgot the
I am actually now following Tejun's last suggestion, and no longer using
my old verify_dead code.
So I am basically calling shrink_slab every once in a while until the
The only change I still need in the allocators is to count the amount of
pages they have, so I can differentiate between need-to-shrink and
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/