linux-kernel - [PATCH 2/3] balancenuma: set last

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Message-ID: <CAJd=RBD-5zq-7U3yPWCsb9P_AMzf_GoT47onxXiihgK9J7-wOA@mail.gmail.com>
Date:	Tue, 27 Nov 2012 21:15:44 +0800
From:	Hillf Danton <dhillf@...il.com>
To:	Mel Gorman <mgorman@...e.de>
Cc:	lkml <linux-kernel@...r.kernel.org>, dhillf@...il.com
Subject: [PATCH 2/3] balancenuma: set last_nid on newly allocated page

Pass last_nid from misplaced page to newly allocated migration target page.

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

--- a/mm/migrate.c	Tue Nov 27 20:16:48 2012
+++ b/mm/migrate.c	Tue Nov 27 20:19:12 2012
@@ -1457,6 +1457,9 @@ static struct page *alloc_misplaced_dst_
 					  __GFP_NOMEMALLOC | __GFP_NORETRY |
 					  __GFP_NOWARN) &
 					 ~GFP_IOFS, 0);
+	if (newpage)
+		page_xchg_last_nid(newpage, page_last_nid(page));
+
 	return newpage;
 }

@@ -1627,6 +1630,8 @@ int migrate_misplaced_transhuge_page(str
 		(GFP_TRANSHUGE | GFP_THISNODE) & ~__GFP_WAIT, HPAGE_PMD_ORDER);
 	if (!new_page)
 		goto out_dropref;
+
+	page_xchg_last_nid(new_page, page_last_nid(page));

 	isolated = numamigrate_isolate_page(pgdat, page);
 	if (!isolated) {
--
--
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