On Tue, 2 Jul 2013, Wanpeng Li wrote: > Before patch: > Active / Total Slabs (% used) : 59018 / 59018 (100.0%) > > After patch: > Active / Total Slabs (% used) : 11086 / 11153 (99.4%) Yes I saw that. > These numbers are dump from slabtop for monitor slub, before patch Active / Total > Slabs are always 100%, this is not truth since empty slabs present. However, the > slab allocator can caculate its Active / Total Slabs correctly and its value is > less than 100.0%. By comparison, slub is more efficient than slab through slabtop > observation, however, it is not truth since slub uncorrectly calculate its > Active / Total Slabs. I always thought about the "empty" slabs to be active since they are used for allocation and frees like the other partial slabs. -- 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>