On Tue, 15 Apr 2014, Vladimir Davydov wrote: > > There is already logic in both slub and slab that does that on cache > > close. > > Yeah, but here the question is when we should close caches left after memcg > offline. Obviously we should do it after all objects of such a cache have > gone, but when exactly? Do it immediately after the last kfree (have to count > objects per cache then AFAIU) or may be check periodically (or on vmpressure) > that the cache is empty by issuing kmem_cache_shrink and looking if > memcg_params::nr_pages = 0? Guess check once in a while if you have no other way to determine this. A hook in kfree() would impact all users. -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@xxxxxxxxx. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: <a href=mailto:"dont@xxxxxxxxx";> email@xxxxxxxxx </a>