From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from psmtp.com (na3sys010amx196.postini.com [74.125.245.196]) by kanga.kvack.org (Postfix) with SMTP id 410756B003D for ; Thu, 14 Mar 2013 06:09:46 -0400 (EDT) Received: from /spool/local by e23smtp03.au.ibm.com with IBM ESMTP SMTP Gateway: Authorized Use Only! Violators will be prosecuted for from ; Thu, 14 Mar 2013 20:03:07 +1000 Received: from d23relay04.au.ibm.com (d23relay04.au.ibm.com [9.190.234.120]) by d23dlp03.au.ibm.com (Postfix) with ESMTP id 3B7EE357804E for ; Thu, 14 Mar 2013 21:09:32 +1100 (EST) Received: from d23av03.au.ibm.com (d23av03.au.ibm.com [9.190.234.97]) by d23relay04.au.ibm.com (8.13.8/8.13.8/NCO v10.0) with ESMTP id r2E9uFdc54001768 for ; Thu, 14 Mar 2013 20:56:16 +1100 Received: from d23av03.au.ibm.com (loopback [127.0.0.1]) by d23av03.au.ibm.com (8.14.4/8.13.1/NCO v10.0 AVout) with ESMTP id r2EA91lx009052 for ; Thu, 14 Mar 2013 21:09:01 +1100 From: Wanpeng Li Subject: [PATCH v2 3/4] introduce zero-filled page stat count Date: Thu, 14 Mar 2013 18:08:16 +0800 Message-Id: <1363255697-19674-4-git-send-email-liwanp@linux.vnet.ibm.com> In-Reply-To: <1363255697-19674-1-git-send-email-liwanp@linux.vnet.ibm.com> References: <1363255697-19674-1-git-send-email-liwanp@linux.vnet.ibm.com> Sender: owner-linux-mm@kvack.org List-ID: To: Greg Kroah-Hartman , Andrew Morton Cc: Dan Magenheimer , Seth Jennings , Konrad Rzeszutek Wilk , Minchan Kim , linux-mm@kvack.org, linux-kernel@vger.kernel.org, Wanpeng Li Introduce zero-filled page statistics to monitor the number of zero-filled pages. Acked-by: Dan Magenheimer Signed-off-by: Wanpeng Li --- drivers/staging/zcache/zcache-main.c | 7 +++++++ 1 files changed, 7 insertions(+), 0 deletions(-) diff --git a/drivers/staging/zcache/zcache-main.c b/drivers/staging/zcache/zcache-main.c index db200b4..2091a4d 100644 --- a/drivers/staging/zcache/zcache-main.c +++ b/drivers/staging/zcache/zcache-main.c @@ -196,6 +196,7 @@ static ssize_t zcache_eph_nonactive_puts_ignored; static ssize_t zcache_pers_nonactive_puts_ignored; static ssize_t zcache_writtenback_pages; static ssize_t zcache_outstanding_writeback_pages; +static ssize_t zcache_pages_zero; #ifdef CONFIG_DEBUG_FS #include @@ -257,6 +258,7 @@ static int zcache_debugfs_init(void) zdfs("outstanding_writeback_pages", S_IRUGO, root, &zcache_outstanding_writeback_pages); zdfs("writtenback_pages", S_IRUGO, root, &zcache_writtenback_pages); + zdfs("pages_zero", S_IRUGO, root, &zcache_pages_zero); return 0; } #undef zdebugfs @@ -326,6 +328,7 @@ void zcache_dump(void) pr_info("zcache: outstanding_writeback_pages=%zd\n", zcache_outstanding_writeback_pages); pr_info("zcache: writtenback_pages=%zd\n", zcache_writtenback_pages); + pr_info("zcache: pages_zero=%zd\n", zcache_pages_zero); } #endif @@ -562,6 +565,7 @@ static void *zcache_pampd_eph_create(char *data, size_t size, bool raw, kunmap_atomic(user_mem); clen = 0; zero_filled = true; + zcache_pages_zero++; goto got_pampd; } kunmap_atomic(user_mem); @@ -645,6 +649,7 @@ static void *zcache_pampd_pers_create(char *data, size_t size, bool raw, kunmap_atomic(user_mem); clen = 0; zero_filled = true; + zcache_pages_zero++; goto got_pampd; } kunmap_atomic(user_mem); @@ -866,6 +871,7 @@ static int zcache_pampd_get_data_and_free(char *data, size_t *sizep, bool raw, zpages = 0; if (!raw) *sizep = PAGE_SIZE; + zcache_pages_zero--; goto zero_fill; } @@ -922,6 +928,7 @@ static void zcache_pampd_free(void *pampd, struct tmem_pool *pool, zero_filled = true; zsize = 0; zpages = 0; + zcache_pages_zero--; } if (pampd_is_remote(pampd) && !zero_filled) { -- 1.7.7.6 -- 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