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Message-Id: <20070831191415.a111636b.kamezawa.hiroyu@jp.fujitsu.com>
Date: Fri, 31 Aug 2007 19:14:15 +0900
From: KAMEZAWA Hiroyuki <kamezawa.hiroyu@...fujitsu.com>
To: KAMEZAWA Hiroyuki <kamezawa.hiroyu@...fujitsu.com>
Cc: LKML <linux-kernel@...r.kernel.org>,
Andrew Morton <akpm@...ux-foundation.org>,
"mel@....ul.ie" <mel@....ul.ie>
Subject: [PATCH] CONFIG_ZONE_MOVABLE [2/2] config zone movable
Makes ZONE_MOVABLE as configurable
Based on "zone_ifdef_cleanup_by_renumbering.patch"
Signed-Off-By: KAMEZAWA Hiroyuki <kamezawa.hiroyu@...fujitsu.com>
Index: devel-2.6.23-rc3-mm1/include/linux/mmzone.h
===================================================================
--- devel-2.6.23-rc3-mm1.orig/include/linux/mmzone.h
+++ devel-2.6.23-rc3-mm1/include/linux/mmzone.h
@@ -177,7 +177,9 @@ enum zone_type {
*/
ZONE_HIGHMEM,
#endif
+#ifdef CONFIG_ZONE_MOVABLE
ZONE_MOVABLE,
+#endif
MAX_NR_ZONES,
#ifndef CONFIG_ZONE_DMA
ZONE_DMA,
@@ -188,6 +190,9 @@ enum zone_type {
#ifndef CONFIG_HIGHMEM
ZONE_HIGHMEM,
#endif
+#ifndef CONFIG_ZONE_MOVABLE
+ ZONE_MOVABLE,
+#endif
};
/*
@@ -612,11 +617,13 @@ static inline int zone_idx_is(enum zone_
static inline int zone_movable_is_highmem(void)
{
-#if CONFIG_ARCH_POPULATES_NODE_MAP
- if (is_configured_zone(ZONE_HIGHMEM))
- return movable_zone == ZONE_HIGHMEM;
-#endif
+#ifdef CONFIG_ARCH_POPULATES_NODE_MAP
+ return is_configured_zone(ZONE_HIGHMEM) &&
+ is_configured_zone(ZONE_MOVABLE) &&
+ (movable_zone == ZONE_HIGHMEM);
+#else
return 0;
+#endif
}
static inline int is_highmem_idx(enum zone_type idx)
Index: devel-2.6.23-rc3-mm1/include/linux/gfp.h
===================================================================
--- devel-2.6.23-rc3-mm1.orig/include/linux/gfp.h
+++ devel-2.6.23-rc3-mm1/include/linux/gfp.h
@@ -130,7 +130,8 @@ static inline enum zone_type gfp_zone(gf
if (is_configured_zone(ZONE_DMA32) && (flags & __GFP_DMA32))
return base + ZONE_DMA32;
- if ((flags & (__GFP_HIGHMEM | __GFP_MOVABLE)) ==
+ if (is_configured_zone(ZONE_MOVABLE) &&
+ (flags & (__GFP_HIGHMEM | __GFP_MOVABLE)) ==
(__GFP_HIGHMEM | __GFP_MOVABLE))
return base + ZONE_MOVABLE;
Index: devel-2.6.23-rc3-mm1/mm/Kconfig
===================================================================
--- devel-2.6.23-rc3-mm1.orig/mm/Kconfig
+++ devel-2.6.23-rc3-mm1/mm/Kconfig
@@ -125,6 +125,18 @@ config SPARSEMEM_VMEMMAP
depends on SPARSEMEM
default y if (SPARSEMEM_VMEMMAP_ENABLE)
+
+config ZONE_MOVABLE
+ bool "Zone for movable pages"
+ depends on ARCH_POPULATES_NODE_MAP
+ help
+ Allows creating a zone type only for movable pages, e.g. page cache
+ and anonymous memory. Because movable pages are easily reclaimed
+ and page migration technique can move them, your chance for allocating
+ contiguous memory such as huge pages will be better than other zones.
+ To use this zone, please see "kernelcore=" or "movablecore=" in
+ Documentation/kernel-parameters.txt
+
# eventually, we can have this option just 'select SPARSEMEM'
config MEMORY_HOTPLUG
bool "Allow for memory hot-add"
Index: devel-2.6.23-rc3-mm1/mm/page_alloc.c
===================================================================
--- devel-2.6.23-rc3-mm1.orig/mm/page_alloc.c
+++ devel-2.6.23-rc3-mm1/mm/page_alloc.c
@@ -95,7 +95,9 @@ int sysctl_lowmem_reserve_ratio[MAX_NR_Z
#ifdef CONFIG_HIGHMEM
32,
#endif
+#ifdef CONFIG_ZONE_MOVABLE
32,
+#endif
};
EXPORT_SYMBOL(totalram_pages);
@@ -4000,6 +4002,10 @@ static int __init cmdline_parse_core(cha
if (!p)
return -EINVAL;
+ if (!is_configured_zone(ZONE_MOVABLE)) {
+ printk ("ZONE_MOVABLE is not configured, %s is ignored.\n",p);
+ return 0;
+ }
coremem = memparse(p, &p);
*core = coremem >> PAGE_SHIFT;
Index: devel-2.6.23-rc3-mm1/mm/vmstat.c
===================================================================
--- devel-2.6.23-rc3-mm1.orig/mm/vmstat.c
+++ devel-2.6.23-rc3-mm1/mm/vmstat.c
@@ -678,8 +678,14 @@ const struct seq_operations pagetypeinfo
#define TEXT_FOR_HIGHMEM(xx)
#endif
+#ifdef CONFIG_ZONE_MOVABLE
+#define TEXT_FOR_MOVABLE(xx) xx "_movable",
+#else
+#define TEXT_FOR_MOVABLE(xx)
+#endif
+
#define TEXTS_FOR_ZONES(xx) TEXT_FOR_DMA(xx) TEXT_FOR_DMA32(xx) xx "_normal", \
- TEXT_FOR_HIGHMEM(xx) xx "_movable",
+ TEXT_FOR_HIGHMEM(xx) xx TEXT_FOR_MOVABLE(xx)
static const char * const vmstat_text[] = {
/* Zoned VM counters */
Index: devel-2.6.23-rc3-mm1/include/linux/vmstat.h
===================================================================
--- devel-2.6.23-rc3-mm1.orig/include/linux/vmstat.h
+++ devel-2.6.23-rc3-mm1/include/linux/vmstat.h
@@ -25,7 +25,14 @@
#define HIGHMEM_ZONE(xx)
#endif
-#define FOR_ALL_ZONES(xx) DMA_ZONE(xx) DMA32_ZONE(xx) xx##_NORMAL HIGHMEM_ZONE(xx) , xx##_MOVABLE
+#ifdef CONFIG_ZONE_MOVABLE
+#define MOVABLE_ZONE(xx) , xx##_MOVABLE
+#else
+#define MOVABLE_ZONE(xx)
+#endif
+
+
+#define FOR_ALL_ZONES(xx) DMA_ZONE(xx) DMA32_ZONE(xx) xx##_NORMAL HIGHMEM_ZONE(xx) MOVABLE_ZONE(xx)
enum vm_event_item { PGPGIN, PGPGOUT, PSWPIN, PSWPOUT,
FOR_ALL_ZONES(PGALLOC),
@@ -170,7 +177,9 @@ static inline unsigned long node_page_st
if (is_configured_zone(ZONE_HIGHMEM))
val += zone_page_state(&zones[ZONE_HIGHMEM], item);
- val += zone_page_state(&zones[ZONE_MOVABLE], item);
+ if (is_configured_zone(ZONE_MOVABLE))
+ val += zone_page_state(&zones[ZONE_MOVABLE], item);
+
return val;
}
-
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