On 05.01.22 22:47, Zi Yan wrote: > From: Zi Yan <ziy@xxxxxxxxxx> > > Enable set_migratetype_isolate() to check specified sub-range for > unmovable pages during isolation. Page isolation is done > at max(MAX_ORDER_NR_PAEGS, pageblock_nr_pages) granularity, but not all > pages within that granularity are intended to be isolated. For example, > alloc_contig_range(), which uses page isolation, allows ranges without > alignment. This commit makes unmovable page check only look for > interesting pages, so that page isolation can succeed for any > non-overlapping ranges. Are you handling if we start checking in the middle of a compound page and actually have to lookup the head to figure out if movable or not? > > has_unmovable_pages() is moved to mm/page_isolation.c since it is only > used by page isolation. Please move that into a separate patch upfront, makes this patch much easier to review. -- Thanks, David / dhildenb
