On Wed, 27 Jan 2016, Vlastimil Babka wrote: > On 01/14/2016 06:24 AM, Joonsoo Kim wrote: > > In fact, I tested another idea implementing OBJFREELIST_SLAB with > > extendable linked array through another freed object. It can remove > > memory waste completely but it causes more computational overhead > > in critical lock path and it seems that overhead outweigh benefit. > > So, this patch doesn't include it. > > Can you elaborate? Do we actually need an extendable linked array? Why not just > store the pointer to the next free object into the object, NULL for the last > one? I.e. a singly-linked list. We should never need to actually traverse it? > > freeing object obj: > *obj = page->freelist; > page->freelist = obj; > > allocating object: > obj = page->freelist; > page->freelist = *obj; > *obj = NULL; Well the single linked lists are a concept of another slab allocator. At what point do we rename SLAB to SLUB2? -- 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>