From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from psmtp.com (na3sys010amx103.postini.com [74.125.245.103]) by kanga.kvack.org (Postfix) with SMTP id 4612F6B0037 for ; Wed, 13 Mar 2013 03:06:11 -0400 (EDT) Received: from /spool/local by e23smtp06.au.ibm.com with IBM ESMTP SMTP Gateway: Authorized Use Only! Violators will be prosecuted for from ; Wed, 13 Mar 2013 17:01:03 +1000 Received: from d23relay04.au.ibm.com (d23relay04.au.ibm.com [9.190.234.120]) by d23dlp02.au.ibm.com (Postfix) with ESMTP id AA53D2BB0053 for ; Wed, 13 Mar 2013 18:05:40 +1100 (EST) Received: from d23av01.au.ibm.com (d23av01.au.ibm.com [9.190.234.96]) by d23relay04.au.ibm.com (8.13.8/8.13.8/NCO v10.0) with ESMTP id r2D6qtBt10813858 for ; Wed, 13 Mar 2013 17:52:56 +1100 Received: from d23av01.au.ibm.com (loopback [127.0.0.1]) by d23av01.au.ibm.com (8.14.4/8.13.1/NCO v10.0 AVout) with ESMTP id r2D75dLt005985 for ; Wed, 13 Mar 2013 18:05:39 +1100 From: Wanpeng Li Subject: [PATCH 3/4] zcache: introduce zero-filled pages stat count Date: Wed, 13 Mar 2013 15:05:20 +0800 Message-Id: <1363158321-20790-4-git-send-email-liwanp@linux.vnet.ibm.com> In-Reply-To: <1363158321-20790-1-git-send-email-liwanp@linux.vnet.ibm.com> References: <1363158321-20790-1-git-send-email-liwanp@linux.vnet.ibm.com> Sender: owner-linux-mm@kvack.org List-ID: To: Andrew Morton Cc: Greg Kroah-Hartman , 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. 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 ed5ef26..dd52975 100644 --- a/drivers/staging/zcache/zcache-main.c +++ b/drivers/staging/zcache/zcache-main.c @@ -191,6 +191,7 @@ 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 @@ -252,6 +253,7 @@ 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 @@ -321,6 +323,7 @@ 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 @@ -557,6 +560,7 @@ 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); @@ -639,6 +643,7 @@ static void *zcache_pampd_pers_create(char *data, size_t size, bool raw, kunmap_atomic(user_mem); clen = 0; zero_filled = 1; + zcache_pages_zero++; goto got_pampd; } kunmap_atomic(user_mem); @@ -859,6 +864,7 @@ static int zcache_pampd_get_data_and_free(char *data, size_t *sizep, bool raw, zpages = 1; if (!raw) *sizep = PAGE_SIZE; + zcache_pages_zero--; goto zero_fill; } @@ -915,6 +921,7 @@ static void zcache_pampd_free(void *pampd, struct tmem_pool *pool, zero_filled = true; zsize = 0; zpages = 1; + 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