From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from psmtp.com (na3sys010amx143.postini.com [74.125.245.143]) by kanga.kvack.org (Postfix) with SMTP id CB9306B0039 for ; Tue, 9 Apr 2013 20:26:18 -0400 (EDT) Received: from /spool/local by e28smtp02.in.ibm.com with IBM ESMTP SMTP Gateway: Authorized Use Only! Violators will be prosecuted for from ; Wed, 10 Apr 2013 05:51:14 +0530 Received: from d28relay02.in.ibm.com (d28relay02.in.ibm.com [9.184.220.59]) by d28dlp03.in.ibm.com (Postfix) with ESMTP id 608DA1258023 for ; Wed, 10 Apr 2013 05:57:37 +0530 (IST) Received: from d28av01.in.ibm.com (d28av01.in.ibm.com [9.184.220.63]) by d28relay02.in.ibm.com (8.13.8/8.13.8/NCO v10.0) with ESMTP id r3A0Q9xQ5964276 for ; Wed, 10 Apr 2013 05:56:09 +0530 Received: from d28av01.in.ibm.com (loopback [127.0.0.1]) by d28av01.in.ibm.com (8.14.4/8.13.1/NCO v10.0 AVout) with ESMTP id r3A0QCXH002719 for ; Wed, 10 Apr 2013 00:26:12 GMT From: Wanpeng Li Subject: [PATCH 04/10] staging: ramster: Provide accessory functions for counter decrease Date: Wed, 10 Apr 2013 08:25:54 +0800 Message-Id: <1365553560-32258-5-git-send-email-liwanp@linux.vnet.ibm.com> In-Reply-To: <1365553560-32258-1-git-send-email-liwanp@linux.vnet.ibm.com> References: <1365553560-32258-1-git-send-email-liwanp@linux.vnet.ibm.com> Sender: owner-linux-mm@kvack.org List-ID: To: Greg Kroah-Hartman Cc: Dan Magenheimer , Seth Jennings , Konrad Rzeszutek Wilk , Minchan Kim , linux-mm@kvack.org, linux-kernel@vger.kernel.org, Andrew Morton , Bob Liu , Wanpeng Li This patch enables these functions to be wrapped and can disable/enable this with CONFIG_DEBUG_FS. Signed-off-by: Wanpeng Li --- 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 -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@kvack.org. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: email@kvack.org