Hi, A tiny series that can reduce the number of find_alloced_obj() invocations (which perform a linear scan of sub-page) during compaction. Inspired by Alexey Romanov's findings. Sergey Senozhatsky (2): zsmalloc: do not scan for allocated objects in empty zspage zsmalloc: move migration destination zspage inuse check mm/zsmalloc.c | 17 +++++++++++++---- 1 file changed, 13 insertions(+), 4 deletions(-) -- 2.41.0.162.gfafddb0af9-goog