From: Marcelo Ricardo Leitner > Sent: 23 January 2017 16:03 ... > > > Does kcalloc() zero the entire area, or just the length you ask for? > > > If the latter you need to zero the rest here. > > Better still, just use krealloc. You still need to zero out any space beyond > > the old length, but it will make the code shorter, and avoid the need for > > additional temporary variables. > > Seems if we pass gfp | __GFP_ZERO to krealloc it will end up zeroing the > slab for us before doing the memcpy. > I didn't follow all paths but in slab_alloc_node it will end up calling: > if (unlikely(gfpflags & __GFP_ZERO) && object) > memset(object, 0, s->object_size); > So I would expect that other paths also do it. You probably don't want krealloc() zeroing all of the new area. David -- To unsubscribe from this list: send the line "unsubscribe linux-sctp" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
