From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752047AbaH3Qlk (ORCPT ); Sat, 30 Aug 2014 12:41:40 -0400 Received: from mail-la0-f47.google.com ([209.85.215.47]:40970 "EHLO mail-la0-f47.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751933AbaH3Ql3 (ORCPT ); Sat, 30 Aug 2014 12:41:29 -0400 Subject: [PATCH v2 3/6] mm/balloon_compaction: isolate balloon pages without lru_lock From: Konstantin Khlebnikov To: Andrew Morton Cc: Konstantin Khlebnikov , Rafael Aquini , Linux Kernel Mailing List , linux-mm@kvack.org, Andrey Ryabinin , Sasha Levin Date: Sat, 30 Aug 2014 20:41:17 +0400 Message-ID: <20140830164117.29066.18189.stgit@zurg> In-Reply-To: <20140830163834.29066.98205.stgit@zurg> References: <20140830163834.29066.98205.stgit@zurg> User-Agent: StGit/0.17.1-dirty MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Konstantin Khlebnikov LRU-lock isn't required for balloon page isolation. This check makes migration of some ballooned pages mostly impossible because isolate_migratepages_range() drops LRU lock periodically. Signed-off-by: Konstantin Khlebnikov Cc: stable # v3.8 --- mm/compaction.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/mm/compaction.c b/mm/compaction.c index 73466e1..ad58f73 100644 --- a/mm/compaction.c +++ b/mm/compaction.c @@ -643,7 +643,7 @@ isolate_migratepages_block(struct compact_control *cc, unsigned long low_pfn, */ if (!PageLRU(page)) { if (unlikely(balloon_page_movable(page))) { - if (locked && balloon_page_isolate(page)) { + if (balloon_page_isolate(page)) { /* Successfully isolated */ goto isolate_success; }