Re: [PATCH] mm: vmscan: fix the page state calculation in too_many_isolated

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On 01/13/2015 09:39 PM, Johannes Weiner wrote:
On Tue, Jan 13, 2015 at 04:37:27PM +0530, Vinayak Menon wrote:
@@ -1392,6 +1392,44 @@ int isolate_lru_page(struct page *page)
  	return ret;
  }

+static int __too_many_isolated(struct zone *zone, int file,
+	struct scan_control *sc, int safe)
+{
+	unsigned long inactive, isolated;
+
+	if (file) {
+		if (safe) {
+			inactive = zone_page_state_snapshot(zone,
+					NR_INACTIVE_FILE);
+			isolated = zone_page_state_snapshot(zone,
+					NR_ISOLATED_FILE);
+		} else {
+			inactive = zone_page_state(zone, NR_INACTIVE_FILE);
+			isolated = zone_page_state(zone, NR_ISOLATED_FILE);
+		}
+	} else {
+		if (safe) {
+			inactive = zone_page_state_snapshot(zone,
+					NR_INACTIVE_ANON);
+			isolated = zone_page_state_snapshot(zone,
+					NR_ISOLATED_ANON);
+		} else {
+			inactive = zone_page_state(zone, NR_INACTIVE_ANON);
+			isolated = zone_page_state(zone, NR_ISOLATED_ANON);
+		}
+	}

	if (safe) {
		inactive = zone_page_state_snapshot(zone, NR_INACTIVE_ANON + 2*file)
		isolated = zone_page_state_snapshot(zone, NR_ISOLATED_ANON + file)
	} else {
		inactive = zone_page_state(zone, NR_INACTIVE_ANON + 2*file)
		isolated = zone_page_state(zone, NR_ISOLATED_ANON + file)
	}


Ok. Will change that.

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