diff options
| author | Hui Zhu <teawaterz@linux.alibaba.com> | 2019-09-23 15:39:37 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2019-09-24 15:54:12 -0700 |
| commit | c165f25d23ecb2f9f121ced20435415b931219e2 (patch) | |
| tree | 150a2e87f86087e88c69ad589ed6fe08af64960e /mm | |
| parent | 28eb3c80871951cae59b9c1b7385262e5d045ac3 (diff) | |
| download | lwn-c165f25d23ecb2f9f121ced20435415b931219e2.tar.gz lwn-c165f25d23ecb2f9f121ced20435415b931219e2.zip | |
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@linux.alibaba.com
Signed-off-by: Hui Zhu <teawaterz@linux.alibaba.com>
Reviewed-by: Shakeel Butt <shakeelb@google.com>
Cc: Dan Streetman <ddstreet@ieee.org>
Cc: Minchan Kim <minchan@kernel.org>
Cc: Nitin Gupta <ngupta@vflare.org>
Cc: Sergey Senozhatsky <sergey.senozhatsky.work@gmail.com>
Cc: Seth Jennings <sjenning@redhat.com>
Cc: Vitaly Wool <vitalywool@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'mm')
| -rw-r--r-- | mm/zpool.c | 16 | ||||
| -rw-r--r-- | mm/zsmalloc.c | 19 |
2 files changed, 26 insertions, 9 deletions
diff --git a/mm/zpool.c b/mm/zpool.c index a2dd9107857d..863669212070 100644 --- a/mm/zpool.c +++ b/mm/zpool.c @@ -239,6 +239,22 @@ const char *zpool_get_type(struct zpool *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. diff --git a/mm/zsmalloc.c b/mm/zsmalloc.c index e98bb6ab4f7e..646858efd468 100644 --- a/mm/zsmalloc.c +++ b/mm/zsmalloc.c @@ -443,15 +443,16 @@ static u64 zs_zpool_total_size(void *pool) } 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"); |