On Fri, Jul 09, 2021 at 05:28:31PM +0800, Yang Huan wrote: > Vmalloc may offen get pages by loop invoke alloc_pags, this is > cost too much time in count watermark/cpuset or something. > Let's just try alloc by alloc_pages_bulk, if failed, fullback in > original path. > > With my own test, simulate loop alloc_page and alloc_pages_bulk_array, > get this: > size 1M 10M 20M 30 > normal 44 1278 3665 5581 > test 34 889 2167 3300 > optimize 22% 30% 40% 40% > And in my vmalloc top sort, zram/f2fs may alloc more than 20MB, so, > It's worth to use alloc_pages_bulk. > > Signed-off-by: Yang Huan <link@xxxxxxxx> Thanks. I suggest you take a look at the current merge window and check if anything additional needs to be done after the vmalloc bulk allocation by Uladzislau Rezki. -- Mel Gorman SUSE Labs
