The patch titled
Subject: zpool: add malloc_support_movable to zpool_driver
has been added to the -mm tree. Its filename is
zpool-add-malloc_support_movable-to-zpool_driver.patch
This patch should soon appear at
http://ozlabs.org/~akpm/mmots/broken-out/zpool-add-malloc_support_movable-to-zpool_driver.patch
and later at
http://ozlabs.org/~akpm/mmotm/broken-out/zpool-add-malloc_support_movable-to-zpool_driver.patch
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The -mm tree is included into linux-next and is updated
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------------------------------------------------------
From: Hui Zhu <teawaterz@xxxxxxxxxxxxxxxxx>
Subject: zpool: add malloc_support_movable to zpool_driver
As a zpool_driver, zsmalloc can allocate movable memory because it support
migate pages. But zbud and z3fold cannot allocate movable memory.
Add malloc_support_movable to zpool_driver. If a zpool_driver support
allocate movable memory, set it to true. And add
zpool_malloc_support_movable check malloc_support_movable to make sure if
a zpool support allocate movable memory.
Link: http://lkml.kernel.org/r/20190605100630.13293-1-teawaterz@xxxxxxxxxxxxxxxxx
Signed-off-by: Hui Zhu <teawaterz@xxxxxxxxxxxxxxxxx>
Cc: Dan Streetman <ddstreet@xxxxxxxx>
Cc: Minchan Kim <minchan@xxxxxxxxxx>
Cc: Nitin Gupta <ngupta@xxxxxxxxxx>
Cc: Sergey Senozhatsky <sergey.senozhatsky.work@xxxxxxxxx>
Cc: Seth Jennings <sjenning@xxxxxxxxxx>
Cc: Vitaly Wool <vitalywool@xxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
include/linux/zpool.h | 3 +++
mm/zpool.c | 16 ++++++++++++++++
mm/zsmalloc.c | 19 ++++++++++---------
3 files changed, 29 insertions(+), 9 deletions(-)
--- a/include/linux/zpool.h~zpool-add-malloc_support_movable-to-zpool_driver
+++ a/include/linux/zpool.h
@@ -46,6 +46,8 @@ const char *zpool_get_type(struct zpool
void zpool_destroy_pool(struct zpool *pool);
+bool zpool_malloc_support_movable(struct zpool *pool);
+
int zpool_malloc(struct zpool *pool, size_t size, gfp_t gfp,
unsigned long *handle);
@@ -90,6 +92,7 @@ struct zpool_driver {
struct zpool *zpool);
void (*destroy)(void *pool);
+ bool malloc_support_movable;
int (*malloc)(void *pool, size_t size, gfp_t gfp,
unsigned long *handle);
void (*free)(void *pool, unsigned long handle);
--- a/mm/zpool.c~zpool-add-malloc_support_movable-to-zpool_driver
+++ a/mm/zpool.c
@@ -239,6 +239,22 @@ const char *zpool_get_type(struct zpool
}
/**
+ * zpool_malloc_support_movable() - Check if the zpool support
+ * allocate movable memory
+ * @zpool: The zpool to check
+ *
+ * This returns if the zpool support allocate movable memory.
+ *
+ * Implementations must guarantee this to be thread-safe.
+ *
+ * Returns: true if if the zpool support allocate movable memory, false if not
+ */
+bool zpool_malloc_support_movable(struct zpool *zpool)
+{
+ return zpool->driver->malloc_support_movable;
+}
+
+/**
* zpool_malloc() - Allocate memory
* @zpool: The zpool to allocate from.
* @size: The amount of memory to allocate.
--- a/mm/zsmalloc.c~zpool-add-malloc_support_movable-to-zpool_driver
+++ a/mm/zsmalloc.c
@@ -438,15 +438,16 @@ static u64 zs_zpool_total_size(void *poo
}
static struct zpool_driver zs_zpool_driver = {
- .type = "zsmalloc",
- .owner = THIS_MODULE,
- .create = zs_zpool_create,
- .destroy = zs_zpool_destroy,
- .malloc = zs_zpool_malloc,
- .free = zs_zpool_free,
- .map = zs_zpool_map,
- .unmap = zs_zpool_unmap,
- .total_size = zs_zpool_total_size,
+ .type = "zsmalloc",
+ .owner = THIS_MODULE,
+ .create = zs_zpool_create,
+ .destroy = zs_zpool_destroy,
+ .malloc_support_movable = true,
+ .malloc = zs_zpool_malloc,
+ .free = zs_zpool_free,
+ .map = zs_zpool_map,
+ .unmap = zs_zpool_unmap,
+ .total_size = zs_zpool_total_size,
};
MODULE_ALIAS("zpool-zsmalloc");
_
Patches currently in -mm which might be from teawaterz@xxxxxxxxxxxxxxxxx are
zpool-add-malloc_support_movable-to-zpool_driver.patch
zswap-use-movable-memory-if-zpool-support-allocate-movable-memory.patch
