linux-kernel - [PATCH] mm: compaction: push isolate search base of compact control one pfn ahead

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [thread-next>] [day] [month] [year] [list]

Date:	Thu, 24 Nov 2011 20:38:14 +0800
From:	Hillf Danton <dhillf@...il.com>
To:	Mel Gorman <mgorman@...e.de>
Cc:	Andrea Arcangeli <aarcange@...hat.com>,
	Andrew Morton <akpm@...ux-foundation.org>, linux-mm@...ck.org,
	LKML <linux-kernel@...r.kernel.org>
Subject: [PATCH] mm: compaction: push isolate search base of compact control
 one pfn ahead

After isolated the current pfn will no longer be scanned and isolated if the
next round is necessary, so push the isolate_migratepages search base of the
given compact_control one step ahead.

Signed-off-by: Hillf Danton <dhillf@...il.com>
---

--- a/mm/compaction.c	Thu Nov 24 20:23:28 2011
+++ b/mm/compaction.c	Thu Nov 24 20:32:41 2011
@@ -365,8 +365,10 @@ static isolate_migrate_t isolate_migrate
 		nr_isolated++;

 		/* Avoid isolating too much */
-		if (cc->nr_migratepages == COMPACT_CLUSTER_MAX)
+		if (cc->nr_migratepages == COMPACT_CLUSTER_MAX) {
+			++low_pfn;
 			break;
+		}
 	}

 	acct_isolated(zone, cc);
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/