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mm/zpool: add name argument to create zpool

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Currently the underlay of zpool: zsmalloc/zbud, do not know who creates
them.  There is not a method to let zsmalloc/zbud find which caller they
belong to.

Now we want to add statistics collection in zsmalloc.  We need to name the
debugfs dir for each pool created.  The way suggested by Minchan Kim is to
use a name passed by caller(such as zram) to create the zsmalloc pool.

    /sys/kernel/debug/zsmalloc/zram0

This patch adds an argument `name' to zs_create_pool() and other related
functions.

Signed-off-by: Ganesh Mahendran <opensource.ganesh@gmail.com>
Acked-by: Minchan Kim <minchan@kernel.org>
Cc: Seth Jennings <sjennings@variantweb.net>
Cc: Nitin Gupta <ngupta@vflare.org>
Cc: Dan Streetman <ddstreet@ieee.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Ganesh Mahendran
2015-02-12 15:00:51 -08:00
committed by Linus Torvalds
parent ee98016010
commit 3eba0c6a56
7 changed files with 21 additions and 14 deletions
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6
mm/zpool.c
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@@ -129,6 +129,7 @@ static void zpool_put_driver(struct zpool_driver *driver)
/**
* zpool_create_pool() - Create a new zpool
* @type The type of the zpool to create (e.g. zbud, zsmalloc)
* @name The name of the zpool (e.g. zram0, zswap)
* @gfp The GFP flags to use when allocating the pool.
* @ops The optional ops callback.
*
@@ -140,7 +141,8 @@ static void zpool_put_driver(struct zpool_driver *driver)
*
* Returns: New zpool on success, NULL on failure.
*/
struct zpool *zpool_create_pool(char *type, gfp_t gfp, struct zpool_ops *ops)
struct zpool *zpool_create_pool(char *type, char *name, gfp_t gfp,
struct zpool_ops *ops)
{
struct zpool_driver *driver;
struct zpool *zpool;
@@ -168,7 +170,7 @@ struct zpool *zpool_create_pool(char *type, gfp_t gfp, struct zpool_ops *ops)
zpool->type = driver->type;
zpool->driver = driver;
zpool->pool = driver->create(gfp, ops);
zpool->pool = driver->create(name, gfp, ops);
zpool->ops = ops;
if (!zpool->pool) {