Commit 0f7d83e8 authored Jul 21, 2014 by Joerg Roedel Committed by Rafael J. Wysocki Jul 29, 2014

PM / Hibernate: Touch Soft Lockup Watchdog in rtree_next_node



When a memory bitmap is fully populated on a large memory
machine (several TB of RAM) it can take more than a minute
to walk through all bits. This causes the soft lockup
detector on these machine to report warnings.

Avoid this by touching the soft lockup watchdog in the
memory bitmap walking code.

Signed-off-by: Joerg Roedel <jroedel@suse.de>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>

parent 9047eb62

kernel/power/snapshot.c

+1 −0

Original line number	Diff line number	Diff line
		@@ -769,6 +769,7 @@ static bool rtree_next_node(struct memory_bitmap *bm)
		if (&bm->cur.node->list != &bm->cur.zone->leaves) {
		bm->cur.node_pfn += BM_BITS_PER_BLOCK;
		bm->cur.node_bit = 0;
		touch_softlockup_watchdog();
		return true;
		}

Admin message