Commit 20605eb5 authored by Matthew Wilcox (Oracle)'s avatar Matthew Wilcox (Oracle) Committed by Andrew Morton
Browse files

memory_hotplug: optimise try_offline_memory_block() 

Extract the zone number directly from the page instead of using the page's
zone number to look up the zone and asking the zone what its number is.

Link: https://lkml.kernel.org/r/20251106201452.2292631-3-willy@infradead.org


Signed-off-by: default avatarMatthew Wilcox (Oracle) <willy@infradead.org>
Cc: David Hildenbrand <david@kernel.org>
Cc: Oscar Salvador <osalvador@suse.de>
Signed-off-by: default avatarAndrew Morton <akpm@linux-foundation.org>
parent c537f0dd

mm/memory_hotplug.c

+1 −1
Original line number Diff line number Diff line
@@ -2327,7 +2327,7 @@ static int try_offline_memory_block(struct memory_block *mem, void *arg) 
	 * by offlining code ... so we don't care about that.

	 */

	page = pfn_to_online_page(section_nr_to_pfn(mem->start_section_nr));

	if (page && zone_idx(page_zone(page)) == ZONE_MOVABLE)

	if (page && page_zonenum(page) == ZONE_MOVABLE)

		online_type = MMOP_ONLINE_MOVABLE;



	rc = device_offline(&mem->dev);