linux-kernel - [PATCH 3/6] LBS: fix hang in isolate_lru

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Message-ID: <Pine.LNX.4.64.0709212145100.13529@blonde.wat.veritas.com>
Date:	Fri, 21 Sep 2007 21:45:52 +0100 (BST)
From:	Hugh Dickins <hugh@...itas.com>
To:	Christoph Lameter <clameter@....com>
cc:	linux-kernel@...r.kernel.org
Subject: [PATCH 3/6] LBS: fix hang in isolate_lru_pages

Hang in isolate_lru_pages: remember to increment scan in all cases.

Signed-off-by: Hugh Dickins <hugh@...itas.com>

--- 2.6.23-rc6-lbs/mm/vmscan.c	2007-09-11 20:01:08.000000000 +0100
+++ linux/mm/vmscan.c	2007-09-13 16:16:34.000000000 +0100
@@ -704,12 +704,14 @@ static unsigned long isolate_lru_pages(u
 		case -EBUSY:
 			/* else it is being freed elsewhere */
 			list_move(&page->lru, src);
+			scan++;
 			continue;
 
 		default:
 			BUG();
 		}
 
+		scan += pages;
 		if (!order)
 			continue;
 
@@ -755,7 +757,6 @@ static unsigned long isolate_lru_pages(u
 				break;
 			}
 		}
-		scan += pages;
 	}
 
 	*scanned = scan;
-
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