[PATCH 16/16] mm: kswapd reclaim debug trace

[Wu Fengguang <wfg@mail.ustc.edu.cn>]

Debug trace for kswapd reclaim.

Signed-off-by: Wu Fengguang <wfg@mail.ustc.edu.cn>
---

 mm/vmscan.c |   11 +++++++++++
 1 files changed, 11 insertions(+)

--- linux.orig/mm/vmscan.c
+++ linux/mm/vmscan.c
@@ -1450,6 +1450,17 @@ loop_again:
 			if (nr_pages) 	/* software suspend */
 				goto scan_swspd;
 
+			if (debug_page_reclaim)
+			printk(KERN_DEBUG "zone %d%d watermark %d%d age %lu prio %d\n",
+					zone_idx(prev_zone),
+					zone_idx(zone),
+					zone_watermark_ok(zone, order,
+						zone->pages_high, 0, 0),
+					zone_watermark_ok(zone, order,
+						zone->pages_high,
+						pgdat->nr_zones - 1, 0),
+					zone->page_age, priority);
+
 			if (zone_watermark_ok(zone, order,
 						zone->pages_high,
 						pgdat->nr_zones - 1, 0)) {

--
-
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