linux-kernel - [PATCH 1/3] mm: move inc_zone_page_state(NR

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Message-Id: <20091009100527.1284.A69D9226@jp.fujitsu.com>
Date:	Fri,  9 Oct 2009 10:06:58 +0900 (JST)
From:	KOSAKI Motohiro <kosaki.motohiro@...fujitsu.com>
To:	LKML <linux-kernel@...r.kernel.org>, linux-mm <linux-mm@...ck.org>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Christoph Lameter <cl@...ux-foundation.org>
Cc:	kosaki.motohiro@...fujitsu.com
Subject: [PATCH 1/3] mm: move inc_zone_page_state(NR_ISOLATED) to just isolated place

This patch series is trivial cleanup and fix of page migration.


==========================================================

Christoph pointed out inc_zone_page_state(NR_ISOLATED) should be placed
in right after isolate_page().

This patch does it.

Cc: Christoph Lameter <cl@...ux-foundation.org>
Signed-off-by: KOSAKI Motohiro <kosaki.motohiro@...fujitsu.com>
---
 mm/memory_hotplug.c |    4 ++++
 mm/mempolicy.c      |    3 +++
 mm/migrate.c        |   12 ++++--------
 3 files changed, 11 insertions(+), 8 deletions(-)

diff --git a/mm/memory_hotplug.c b/mm/memory_hotplug.c
index 821dee5..653bf1e 100644
--- a/mm/memory_hotplug.c
+++ b/mm/memory_hotplug.c
@@ -26,6 +26,7 @@
 #include <linux/migrate.h>
 #include <linux/page-isolation.h>
 #include <linux/pfn.h>
+#include <linux/mm_inline.h>
 
 #include <asm/tlbflush.h>
 
@@ -663,6 +664,9 @@ do_migrate_range(unsigned long start_pfn, unsigned long end_pfn)
 		if (!ret) { /* Success */
 			list_add_tail(&page->lru, &source);
 			move_pages--;
+			inc_zone_page_state(page, NR_ISOLATED_ANON +
+					    page_is_file_cache(page));
+
 		} else {
 			/* Becasue we don't have big zone->lock. we should
 			   check this again here. */
diff --git a/mm/mempolicy.c b/mm/mempolicy.c
index 7dd9d9f..473f888 100644
--- a/mm/mempolicy.c
+++ b/mm/mempolicy.c
@@ -89,6 +89,7 @@
 #include <linux/security.h>
 #include <linux/syscalls.h>
 #include <linux/ctype.h>
+#include <linux/mm_inline.h>
 
 #include <asm/tlbflush.h>
 #include <asm/uaccess.h>
@@ -809,6 +810,8 @@ static void migrate_page_add(struct page *page, struct list_head *pagelist,
 	if ((flags & MPOL_MF_MOVE_ALL) || page_mapcount(page) == 1) {
 		if (!isolate_lru_page(page)) {
 			list_add_tail(&page->lru, pagelist);
+			inc_zone_page_state(page, NR_ISOLATED_ANON +
+					    page_is_file_cache(page));
 		}
 	}
 }
diff --git a/mm/migrate.c b/mm/migrate.c
index 1a4bf48..0f66803 100644
--- a/mm/migrate.c
+++ b/mm/migrate.c
@@ -746,13 +746,6 @@ int migrate_pages(struct list_head *from,
 	struct page *page2;
 	int swapwrite = current->flags & PF_SWAPWRITE;
 	int rc;
-	unsigned long flags;
-
-	local_irq_save(flags);
-	list_for_each_entry(page, from, lru)
-		__inc_zone_page_state(page, NR_ISOLATED_ANON +
-				page_is_file_cache(page));
-	local_irq_restore(flags);
 
 	if (!swapwrite)
 		current->flags |= PF_SWAPWRITE;
@@ -878,8 +871,11 @@ static int do_move_page_to_node_array(struct mm_struct *mm,
 			goto put_and_set;
 
 		err = isolate_lru_page(page);
-		if (!err)
+		if (!err) {
 			list_add_tail(&page->lru, &pagelist);
+			inc_zone_page_state(page, NR_ISOLATED_ANON +
+					    page_is_file_cache(page));
+		}
 put_and_set:
 		/*
 		 * Either remove the duplicate refcount from
-- 
1.6.0.GIT



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