From 42c722d4cb4022e56ff200f3f5a58c0dfd7edac6 Mon Sep 17 00:00:00 2001 From: Christoph Lameter Date: Wed, 1 Feb 2006 03:05:26 -0800 Subject: [PATCH] [PATCH] zone_reclaim: reclaim on memory only node support Zone reclaim is usually only run on the local node. Headless nodes do not have any local processors. This patch checks for headless nodes and performs zone reclaim on them. Signed-off-by: Christoph Lameter Signed-off-by: Andy Whitcroft Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- mm/vmscan.c | 8 +++++++- 1 file changed, 7 insertions(+), 1 deletion(-) diff --git a/mm/vmscan.c b/mm/vmscan.c index 465bfa54dfd6..0ca6007d655b 100644 --- a/mm/vmscan.c +++ b/mm/vmscan.c @@ -1599,17 +1599,23 @@ int zone_reclaim(struct zone *zone, gfp_t gfp_mask, unsigned int order) struct task_struct *p = current; struct reclaim_state reclaim_state; struct scan_control sc; + cpumask_t mask; + int node_id; if (time_before(jiffies, zone->last_unsuccessful_zone_reclaim + ZONE_RECLAIM_INTERVAL)) return 0; if (!(gfp_mask & __GFP_WAIT) || - zone->zone_pgdat->node_id != numa_node_id() || zone->all_unreclaimable || atomic_read(&zone->reclaim_in_progress) > 0) return 0; + node_id = zone->zone_pgdat->node_id; + mask = node_to_cpumask(node_id); + if (!cpus_empty(mask) && node_id != numa_node_id()) + return 0; + sc.may_writepage = 0; sc.may_swap = 0; sc.nr_scanned = 0; -- 2.30.2