Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1756672Ab3CNKJT (ORCPT ); Thu, 14 Mar 2013 06:09:19 -0400 Received: from e23smtp07.au.ibm.com ([202.81.31.140]:33426 "EHLO e23smtp07.au.ibm.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1755566Ab3CNKJJ (ORCPT ); Thu, 14 Mar 2013 06:09:09 -0400 From: Wanpeng Li 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 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> X-Mailer: git-send-email 1.7.5.4 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> X-Content-Scanned: Fidelis XPS MAILER x-cbid: 13031410-0260-0000-0000-000002AABE0B Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 2542 Lines: 77 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 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/