*/
boost_watermark(zone);
if (alloc_flags & ALLOC_KSWAPD)
- wakeup_kswapd(zone, 0, 0, zone_idx(zone));
+ set_bit(ZONE_BOOSTED_WATERMARK, &zone->flags);
/* We are not allowed to try stealing from the whole block */
if (!whole_block)
local_irq_restore(flags);
out:
+ /* Separate test+clear to avoid unnecessary atomics */
+ if (test_bit(ZONE_BOOSTED_WATERMARK, &zone->flags)) {
+ clear_bit(ZONE_BOOSTED_WATERMARK, &zone->flags);
+ wakeup_kswapd(zone, 0, 0, zone_idx(zone));
+ }
+
VM_BUG_ON_PAGE(page && bad_range(zone, page), page);
return page;