On 2015/06/04 21:58, Xishi Qiu wrote:
This patch introduces a new MIGRATE_TYPES called "MIGRATE_MIRROR", it is used
to storage the mirrored pages list.
When cat /proc/pagetypeinfo, you can see the count of free mirrored blocks.
I guess you need to add Mel to CC.
e.g.
euler-linux:~ # cat /proc/pagetypeinfo
Page block order: 9
Pages per block: 512
Free pages count per migrate type at order 0 1 2 3 4 5 6 7 8 9 10
Node 0, zone DMA, type Unmovable 1 1 0 0 2 1 1 0 1 0 0
Node 0, zone DMA, type Reclaimable 0 0 0 0 0 0 0 0 0 0 0
Node 0, zone DMA, type Movable 0 0 0 0 0 0 0 0 0 0 3
Node 0, zone DMA, type Mirror 0 0 0 0 0 0 0 0 0 0 0
Node 0, zone DMA, type Reserve 0 0 0 0 0 0 0 0 0 1 0
Node 0, zone DMA, type Isolate 0 0 0 0 0 0 0 0 0 0 0
Node 0, zone DMA32, type Unmovable 0 0 1 0 0 0 0 1 1 1 0
Node 0, zone DMA32, type Reclaimable 0 0 0 0 0 0 0 0 0 0 0
Node 0, zone DMA32, type Movable 1 2 6 6 6 4 5 3 3 2 738
Node 0, zone DMA32, type Mirror 0 0 0 0 0 0 0 0 0 0 0
Node 0, zone DMA32, type Reserve 0 0 0 0 0 0 0 0 0 0 1
Node 0, zone DMA32, type Isolate 0 0 0 0 0 0 0 0 0 0 0
Node 0, zone Normal, type Unmovable 0 0 0 0 0 0 0 0 0 0 0
Node 0, zone Normal, type Reclaimable 0 0 0 0 0 0 0 0 0 0 0
Node 0, zone Normal, type Movable 0 0 1 1 0 0 0 2 1 0 4254
Node 0, zone Normal, type Mirror 148 104 63 70 26 11 2 2 1 1 973
Node 0, zone Normal, type Reserve 0 0 0 0 0 0 0 0 0 0 1
Node 0, zone Normal, type Isolate 0 0 0 0 0 0 0 0 0 0 0
Number of blocks type Unmovable Reclaimable Movable Mirror Reserve Isolate
Node 0, zone DMA 1 0 6 0 1 0
Node 0, zone DMA32 2 0 1525 0 1 0
Node 0, zone Normal 0 0 8702 2048 2 0
Page block order: 9
Pages per block: 512
Free pages count per migrate type at order 0 1 2 3 4 5 6 7 8 9 10
Node 1, zone Normal, type Unmovable 0 0 0 0 0 0 0 0 0 0 0
Node 1, zone Normal, type Reclaimable 0 0 0 0 0 0 0 0 0 0 0
Node 1, zone Normal, type Movable 2 2 1 1 2 1 2 2 2 3 3996
Node 1, zone Normal, type Mirror 68 94 57 6 8 1 0 0 3 1 2003
Node 1, zone Normal, type Reserve 0 0 0 0 0 0 0 0 0 0 1
Node 1, zone Normal, type Isolate 0 0 0 0 0 0 0 0 0 0 0
Number of blocks type Unmovable Reclaimable Movable Mirror Reserve Isolate
Node 1, zone Normal 0 0 8190 4096 2 0
Signed-off-by: Xishi Qiu <qiuxishi@xxxxxxxxxx>
---
include/linux/mmzone.h | 6 ++++++
mm/page_alloc.c | 3 +++
mm/vmstat.c | 3 +++
3 files changed, 12 insertions(+)
diff --git a/include/linux/mmzone.h b/include/linux/mmzone.h
index 1fae07b..b444335 100644
--- a/include/linux/mmzone.h
+++ b/include/linux/mmzone.h
@@ -39,6 +39,9 @@ enum {
MIGRATE_UNMOVABLE,
MIGRATE_RECLAIMABLE,
MIGRATE_MOVABLE,
+#ifdef CONFIG_MEMORY_MIRROR
+ MIGRATE_MIRROR,
+#endif
I can't imagine how the fallback logic will work at reading this patch.
I think an update for fallback order array should be in this patch...
MIGRATE_PCPTYPES, /* the number of types on the pcp lists */
MIGRATE_RESERVE = MIGRATE_PCPTYPES,
#ifdef CONFIG_CMA
@@ -82,6 +85,9 @@ struct mirror_info {
};
extern struct mirror_info mirror_info;
+# define is_migrate_mirror(migratetype) unlikely((migratetype) == MIGRATE_MIRROR)
+#else
+# define is_migrate_mirror(migratetype) false
#endif
#define for_each_migratetype_order(order, type) \
diff --git a/mm/page_alloc.c b/mm/page_alloc.c
index 41a95a7..3b2ff46 100644
--- a/mm/page_alloc.c
+++ b/mm/page_alloc.c
@@ -3245,6 +3245,9 @@ static void show_migration_types(unsigned char type)
[MIGRATE_UNMOVABLE] = 'U',
[MIGRATE_RECLAIMABLE] = 'E',
[MIGRATE_MOVABLE] = 'M',
+#ifdef CONFIG_MEMORY_MIRROR
+ [MIGRATE_MIRROR] = 'O',
+#endif
[MIGRATE_RESERVE] = 'R',
#ifdef CONFIG_CMA
[MIGRATE_CMA] = 'C',
diff --git a/mm/vmstat.c b/mm/vmstat.c
index 4f5cd97..d0323e0 100644
--- a/mm/vmstat.c
+++ b/mm/vmstat.c
@@ -901,6 +901,9 @@ static char * const migratetype_names[MIGRATE_TYPES] = {
"Unmovable",
"Reclaimable",
"Movable",
+#ifdef CONFIG_MEMORY_MIRROR
+ "Mirror",
+#endif
"Reserve",
#ifdef CONFIG_CMA
"CMA",
--
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