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Commit 9a5c5968 authored by Wanpeng Li's avatar Wanpeng Li Committed by Greg Kroah-Hartman
Browse files

staging: ramster: Provide accessory functions for counter decrease 



This patch enables these functions to be wrapped and
can disable/enable this with CONFIG_DEBUG_FS.

Signed-off-by: default avatarWanpeng Li <liwanp@linux.vnet.ibm.com>
Acked-by: default avatarDan Magenheimer <dan.magenheimer@oracle.com>
Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
parent 93cc39b6

drivers/staging/zcache/ramster/ramster.c

+19 −13
Original line number Diff line number Diff line
@@ -73,6 +73,10 @@ static inline void inc_ramster_flnodes(void) 
	if (ramster_flnodes > ramster_flnodes_max)

		ramster_flnodes_max = ramster_flnodes;

}

static inline void dec_ramster_flnodes(void)

{

	ramster_flnodes = atomic_dec_return(&ramster_flnodes_atomic);

}

static ssize_t ramster_foreign_eph_pages;

static atomic_t ramster_foreign_eph_pages_atomic = ATOMIC_INIT(0);

static ssize_t ramster_foreign_eph_pages_max;
@@ -83,6 +87,11 @@ static inline void inc_ramster_foreign_eph_pages(void) 
	if (ramster_foreign_eph_pages > ramster_foreign_eph_pages_max)

		ramster_foreign_eph_pages_max = ramster_foreign_eph_pages;

}

static inline void dec_ramster_foreign_eph_pages(void)

{

	ramster_foreign_eph_pages = atomic_dec_return(

			&ramster_foreign_eph_pages_atomic);

}

static ssize_t ramster_foreign_pers_pages;

static atomic_t ramster_foreign_pers_pages_atomic = ATOMIC_INIT(0);

static ssize_t ramster_foreign_pers_pages_max;
@@ -93,6 +102,11 @@ static inline void inc_ramster_foreign_pers_pages(void) 
	if (ramster_foreign_pers_pages > ramster_foreign_pers_pages_max)

		ramster_foreign_pers_pages_max = ramster_foreign_pers_pages;

}

static inline void dec_ramster_foreign_pers_pages(void)

{

	ramster_foreign_pers_pages = atomic_dec_return(

		&ramster_foreign_pers_pages_atomic);

}

static ssize_t ramster_eph_pages_remoted;

static ssize_t ramster_pers_pages_remoted;

static ssize_t ramster_eph_pages_remote_failed;
@@ -188,10 +202,8 @@ static struct flushlist_node *ramster_flnode_alloc(struct tmem_pool *pool) 
static void ramster_flnode_free(struct flushlist_node *flnode,

				struct tmem_pool *pool)

{

	int flnodes;



	flnodes = atomic_dec_return(&ramster_flnodes_atomic);

	BUG_ON(flnodes < 0);

	dec_ramster_flnodes();

	BUG_ON(ramster_flnodes < 0);

	kmem_cache_free(ramster_flnode_cache, flnode);

}
@@ -484,26 +496,20 @@ void *ramster_pampd_free(void *pampd, struct tmem_pool *pool, 


void ramster_count_foreign_pages(bool eph, int count)

{

	int c;



	BUG_ON(count != 1 && count != -1);

	if (eph) {

		if (count > 0) {

			inc_ramster_foreign_eph_pages();

		} else {

			c = atomic_dec_return(&ramster_foreign_eph_pages_atomic);

			WARN_ON_ONCE(c < 0);

			dec_ramster_foreign_eph_pages();

			WARN_ON_ONCE(ramster_foreign_eph_pages < 0);

		}

		ramster_foreign_eph_pages = c;

	} else {

		if (count > 0) {

			inc_ramster_foreign_pers_pages();

		} else {

			c = atomic_dec_return(

					&ramster_foreign_pers_pages_atomic);

			WARN_ON_ONCE(c < 0);

			WARN_ON_ONCE(ramster_foreign_pers_pages < 0);

		}

		ramster_foreign_pers_pages = c;

	}

}