lkml.org 
[lkml]   [2013]   [Apr]   [9]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
Patch in this message
/
From
Subject[PATCH 04/10] staging: ramster: Provide accessory functions for counter decrease
Date
This patch enables these functions to be wrapped and
can disable/enable this with CONFIG_DEBUG_FS.

Signed-off-by: Wanpeng Li <liwanp@linux.vnet.ibm.com>
---
drivers/staging/zcache/ramster/ramster.c | 32 ++++++++++++++++++------------
1 file changed, 19 insertions(+), 13 deletions(-)

diff --git a/drivers/staging/zcache/ramster/ramster.c b/drivers/staging/zcache/ramster/ramster.c
index b60e884..c3d7f96 100644
--- a/drivers/staging/zcache/ramster/ramster.c
+++ b/drivers/staging/zcache/ramster/ramster.c
@@ -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;
}
}

--
1.7.10.4


\
 
 \ /
  Last update: 2013-04-10 03:01    [W:0.072 / U:0.492 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site