On Fri, May 27, 2016 at 7:30 PM, Christoph Lameter <c...@linux.com> wrote: > On Fri, 27 May 2016, Alexander Potapenko wrote: > >> It's reasonable to rely on the fact that for every page allocated for a >> kmem_cache the |slab_cache| field points to that cache. Without that it's >> hard to figure out which cache does an allocated object belong to. > > The flags are set only in the head page of a coumpound page which is used > by SLAB. No need to do this. This would just mean unnecessarily dirtying > struct page cachelines on allocation. >
Got it, thank you. Looks like I just need to make sure my code uses virt_to_head_page()->page_slab to get the cache for an object. -- Alexander Potapenko Software Engineer Google Germany GmbH Erika-Mann-Straße, 33 80636 München Geschäftsführer: Matthew Scott Sucherman, Paul Terence Manicle Registergericht und -nummer: Hamburg, HRB 86891 Sitz der Gesellschaft: Hamburg
