---

yaml --- r: 257363 b: refs/heads/master c: e9299f5 h: refs/heads/master i: 257361: b20771c 257359: 06d1ae9 v: v3
git-mirror · Jul 20, 2011 · 0f34391 · 0f34391
1 parent c6f620c
commit 0f34391
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Showing 3 changed files with 8 additions and 6 deletions.
diff --git a/[refs] b/[refs]
@@ -1,2 +1,2 @@
 ---
-refs/heads/master: 3567b59aa80ac4417002bf58e35dce5c777d4164
+refs/heads/master: e9299f5058595a655c3b207cda9635e28b9197e6
diff --git a/trunk/include/linux/mm.h b/trunk/include/linux/mm.h
@@ -1150,6 +1150,7 @@ struct shrink_control {
 struct shrinker {
 	int (*shrink)(struct shrinker *, struct shrink_control *sc);
 	int seeks;	/* seeks to recreate an obj */
+	long batch;	/* reclaim batch size, 0 = default */
 
 	/* These are for internal use */
 	struct list_head list;

diff --git a/trunk/mm/vmscan.c b/trunk/mm/vmscan.c
@@ -253,6 +253,8 @@ unsigned long shrink_slab(struct shrink_control *shrink,
 		int shrink_ret = 0;
 		long nr;
 		long new_nr;
+		long batch_size = shrinker->batch ? shrinker->batch
+						  : SHRINK_BATCH;
 
 		/*
 		 * copy the current shrinker scan count into a local variable
@@ -303,19 +305,18 @@ unsigned long shrink_slab(struct shrink_control *shrink,
 					nr_pages_scanned, lru_pages,
 					max_pass, delta, total_scan);
 
-		while (total_scan >= SHRINK_BATCH) {
-			long this_scan = SHRINK_BATCH;
+		while (total_scan >= batch_size) {
 			int nr_before;
 
 			nr_before = do_shrinker_shrink(shrinker, shrink, 0);
 			shrink_ret = do_shrinker_shrink(shrinker, shrink,
-							this_scan);
+							batch_size);
 			if (shrink_ret == -1)
 				break;
 			if (shrink_ret < nr_before)
 				ret += nr_before - shrink_ret;
-			count_vm_events(SLABS_SCANNED, this_scan);
-			total_scan -= this_scan;
+			count_vm_events(SLABS_SCANNED, batch_size);
+			total_scan -= batch_size;
 
 			cond_resched();
 		}