code: mafs

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avoid updating es->lru after each iteration as the loop is taking forever

--- a/extents.c

+++ b/extents.c

@@ -203,7 +203,7 @@

 doadd(Extents *es, u64 start, u64 len)

 {

 	s64 dir;

-	Extent *e;

+	Extent *e, *eprev;

 	if(es == nil)

 		panic("add es == nil");

@@ -226,9 +226,10 @@

 	}

 	if(dir < 0){

 		while(e->low != nil && (dir = belongs(e, start, len)) < 0){

-			es->lru = e;

+			eprev = e;

 			e = e->low;

 		}

+		es->lru = eprev;

 		/* e->low e es->lru */

 		if(dir == 0)

 			return increment(es, e, start, len);

@@ -240,9 +241,10 @@

 		return addextent(es, es->lru, start, len);

 	}else if(dir > 0){

 		while(e->high != nil && (dir = belongs(e, start, len)) > 0){

-			es->lru = e;

+			eprev = e;

 			e = e->high;

 		}

+		es->lru = eprev;

 		/* es->lru e e->high */

 		if(dir == 0)

 			return increment(es, e, start, len);