Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S932749Ab2KEOu5 (ORCPT ); Mon, 5 Nov 2012 09:50:57 -0500 Received: from aserp1040.oracle.com ([141.146.126.69]:34839 "EHLO aserp1040.oracle.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S932646Ab2KEOux (ORCPT ); Mon, 5 Nov 2012 09:50:53 -0500 From: Konrad Rzeszutek Wilk To: linux-kernel@vger.kernel.org, sjenning@linux.vnet.ibm.com, dan.magenheimer@oracle.com, ngupta@vflare.org, minchan@kernel.org, rcj@linux.vnet.ibm.com, linux-mm@kvack.org, gregkh@linuxfoundation.org, devel@driverdev.osuosl.org Cc: akpm@linux-foundation.org, Konrad Rzeszutek Wilk Subject: [PATCH 04/11] zcache: Provide accessory functions for counter decrease. Date: Mon, 5 Nov 2012 09:37:27 -0500 Message-Id: <1352126254-28933-5-git-send-email-konrad.wilk@oracle.com> X-Mailer: git-send-email 1.7.7.6 In-Reply-To: <1352126254-28933-1-git-send-email-konrad.wilk@oracle.com> References: <1352126254-28933-1-git-send-email-konrad.wilk@oracle.com> X-Source-IP: ucsinet22.oracle.com [156.151.31.94] Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 7918 Lines: 208 This way we can have all wrapped with these functions and can disable/enable this with CONFIG_DEBUG_FS. Signed-off-by: Konrad Rzeszutek Wilk --- drivers/staging/ramster/zcache-main.c | 88 +++++++++++++++++++-------------- 1 files changed, 51 insertions(+), 37 deletions(-) diff --git a/drivers/staging/ramster/zcache-main.c b/drivers/staging/ramster/zcache-main.c index 6fd7f0e..29ffbf1 100644 --- a/drivers/staging/ramster/zcache-main.c +++ b/drivers/staging/ramster/zcache-main.c @@ -141,8 +141,12 @@ static inline void inc_zcache_obj_count(void) if (zcache_obj_count > zcache_obj_count_max) zcache_obj_count_max = zcache_obj_count; } - static long zcache_objnode_count; +static inline void dec_zcache_obj_count(void) +{ + zcache_obj_count = atomic_dec_return(&zcache_obj_atomic); + BUG_ON(zcache_obj_count < 0); +}; static atomic_t zcache_objnode_atomic = ATOMIC_INIT(0); static long zcache_objnode_count_max; static inline void inc_zcache_objnode_count(void) @@ -151,6 +155,11 @@ static inline void inc_zcache_objnode_count(void) if (zcache_objnode_count > zcache_objnode_count_max) zcache_objnode_count_max = zcache_objnode_count; }; +static inline void dec_zcache_objnode_count(void) +{ + zcache_objnode_count = atomic_dec_return(&zcache_objnode_atomic); + BUG_ON(zcache_objnode_count < 0); +}; static u64 zcache_eph_zbytes; static atomic_long_t zcache_eph_zbytes_atomic = ATOMIC_INIT(0); static u64 zcache_eph_zbytes_max; @@ -160,6 +169,10 @@ static inline void inc_zcache_eph_zbytes(unsigned clen) if (zcache_eph_zbytes > zcache_eph_zbytes_max) zcache_eph_zbytes_max = zcache_eph_zbytes; }; +static inline void dec_zcache_eph_zbytes(unsigned zsize) +{ + zcache_eph_zbytes = atomic_long_sub_return(zsize, &zcache_eph_zbytes_atomic); +}; static u64 zcache_pers_zbytes; static atomic_long_t zcache_pers_zbytes_atomic = ATOMIC_INIT(0); static u64 zcache_pers_zbytes_max; @@ -170,6 +183,10 @@ static inline void inc_zcache_pers_zbytes(unsigned clen) zcache_pers_zbytes_max = zcache_pers_zbytes; } static long zcache_eph_pageframes; +static inline void dec_zcache_pers_zbytes(unsigned zsize) +{ + zcache_pers_zbytes = atomic_long_sub_return(zsize, &zcache_pers_zbytes_atomic); +} static atomic_t zcache_eph_pageframes_atomic = ATOMIC_INIT(0); static long zcache_eph_pageframes_max; static inline void inc_zcache_eph_pageframes(void) @@ -179,6 +196,10 @@ static inline void inc_zcache_eph_pageframes(void) zcache_eph_pageframes_max = zcache_eph_pageframes; }; static long zcache_pers_pageframes; +static inline void dec_zcache_eph_pageframes(void) +{ + zcache_eph_pageframes = atomic_dec_return(&zcache_eph_pageframes_atomic); +}; static atomic_t zcache_pers_pageframes_atomic = ATOMIC_INIT(0); static long zcache_pers_pageframes_max; static inline void inc_zcache_pers_pageframes(void) @@ -188,6 +209,10 @@ static inline void inc_zcache_pers_pageframes(void) zcache_pers_pageframes_max = zcache_pers_pageframes; } static long zcache_pageframes_alloced; +static inline void dec_zcache_pers_pageframes(void) +{ + zcache_pers_pageframes = atomic_dec_return(&zcache_pers_pageframes_atomic); +} static atomic_t zcache_pageframes_alloced_atomic = ATOMIC_INIT(0); static inline void inc_zcache_pageframes_alloced(void) { @@ -209,6 +234,10 @@ static inline void inc_zcache_eph_zpages(void) zcache_eph_zpages_max = zcache_eph_zpages; } static long zcache_pers_zpages; +static inline void dec_zcache_eph_zpages(unsigned zpages) +{ + zcache_eph_zpages = atomic_sub_return(zpages, &zcache_eph_zpages_atomic); +} static atomic_t zcache_pers_zpages_atomic = ATOMIC_INIT(0); static long zcache_pers_zpages_max; static inline void inc_zcache_pers_zpages(void) @@ -217,6 +246,10 @@ static inline void inc_zcache_pers_zpages(void) if (zcache_pers_zpages > zcache_pers_zpages_max) zcache_pers_zpages_max = zcache_pers_zpages; } +static inline void dec_zcache_pers_zpages(unsigned zpages) +{ + zcache_pers_zpages = atomic_sub_return(zpages, &zcache_pers_zpages_atomic); +} /* but for the rest of these, counting races are ok */ static unsigned long zcache_flush_total; static unsigned long zcache_flush_found; @@ -461,9 +494,7 @@ static struct tmem_objnode *zcache_objnode_alloc(struct tmem_pool *pool) static void zcache_objnode_free(struct tmem_objnode *objnode, struct tmem_pool *pool) { - zcache_objnode_count = - atomic_dec_return(&zcache_objnode_atomic); - BUG_ON(zcache_objnode_count < 0); + dec_zcache_objnode_count(); kmem_cache_free(zcache_objnode_cache, objnode); } @@ -482,9 +513,7 @@ static struct tmem_obj *zcache_obj_alloc(struct tmem_pool *pool) static void zcache_obj_free(struct tmem_obj *obj, struct tmem_pool *pool) { - zcache_obj_count = - atomic_dec_return(&zcache_obj_atomic); - BUG_ON(zcache_obj_count < 0); + dec_zcache_obj_count(); kmem_cache_free(zcache_obj_cache, obj); } @@ -811,20 +840,14 @@ static int zcache_pampd_get_data_and_free(char *data, size_t *sizep, bool raw, &zsize, &zpages); if (eph) { if (page) - zcache_eph_pageframes = - atomic_dec_return(&zcache_eph_pageframes_atomic); - zcache_eph_zpages = - atomic_sub_return(zpages, &zcache_eph_zpages_atomic); - zcache_eph_zbytes = - atomic_long_sub_return(zsize, &zcache_eph_zbytes_atomic); + dec_zcache_eph_pageframes(); + dec_zcache_eph_zpages(zpages); + dec_zcache_eph_zbytes(zsize); } else { if (page) - zcache_pers_pageframes = - atomic_dec_return(&zcache_pers_pageframes_atomic); - zcache_pers_zpages = - atomic_sub_return(zpages, &zcache_pers_zpages_atomic); - zcache_pers_zbytes = - atomic_long_sub_return(zsize, &zcache_pers_zbytes_atomic); + dec_zcache_pers_pageframes(); + dec_zcache_pers_zpages(zpages); + dec_zcache_pers_zbytes(zsize); } if (!is_local_client(pool->client)) ramster_count_foreign_pages(eph, -1); @@ -854,23 +877,17 @@ static void zcache_pampd_free(void *pampd, struct tmem_pool *pool, page = zbud_free_and_delist((struct zbudref *)pampd, true, &zsize, &zpages); if (page) - zcache_eph_pageframes = - atomic_dec_return(&zcache_eph_pageframes_atomic); - zcache_eph_zpages = - atomic_sub_return(zpages, &zcache_eph_zpages_atomic); - zcache_eph_zbytes = - atomic_long_sub_return(zsize, &zcache_eph_zbytes_atomic); + dec_zcache_eph_pageframes(); + dec_zcache_eph_zpages(zpages); + dec_zcache_eph_zbytes(zsize); /* FIXME CONFIG_RAMSTER... check acct parameter? */ } else { page = zbud_free_and_delist((struct zbudref *)pampd, false, &zsize, &zpages); if (page) - zcache_pers_pageframes = - atomic_dec_return(&zcache_pers_pageframes_atomic); - zcache_pers_zpages = - atomic_sub_return(zpages, &zcache_pers_zpages_atomic); - zcache_pers_zbytes = - atomic_long_sub_return(zsize, &zcache_pers_zbytes_atomic); + dec_zcache_pers_pageframes(); + dec_zcache_pers_zpages(zpages); + dec_zcache_pers_zbytes(zsize); } if (!is_local_client(pool->client)) ramster_count_foreign_pages(is_ephemeral(pool), -1); @@ -992,13 +1009,10 @@ static struct page *zcache_evict_eph_pageframe(void) page = zbud_evict_pageframe_lru(&zsize, &zpages); if (page == NULL) goto out; - zcache_eph_zbytes = atomic_long_sub_return(zsize, - &zcache_eph_zbytes_atomic); - zcache_eph_zpages = atomic_sub_return(zpages, - &zcache_eph_zpages_atomic); + dec_zcache_eph_zbytes(zsize); + dec_zcache_eph_zpages(zpages); zcache_evicted_eph_zpages++; - zcache_eph_pageframes = - atomic_dec_return(&zcache_eph_pageframes_atomic); + dec_zcache_eph_pageframes(); zcache_evicted_eph_pageframes++; out: return page; -- 1.7.7.6 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/