2016-01-27 0:01 GMT+09:00 Christoph Lameter <cl@xxxxxxxxx>: > On Tue, 26 Jan 2016, Joonsoo Kim wrote: > >> I doesn't follow up that discussion, but, I think that reusing >> SLAB_POISON for slab sanitization needs more changes. I assume that >> completeness and performance is matter for slab sanitization. >> >> 1) SLAB_POISON isn't applied to specific kmem_cache which has >> constructor or SLAB_DESTROY_BY_RCU flag. For debug, it's not necessary >> to be applied, but, for slab sanitization, it is better to apply it to >> all caches. > > Those slabs can be legitimately accessed after the objects were freed. You > cannot sanitize nor poison. Oops... you are right. I misunderstand what SLAB_DESTROY_BY_RCU is. Now, it's clear to me. Thanks. -- 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>