Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753566Ab3COCfX (ORCPT ); Thu, 14 Mar 2013 22:35:23 -0400 Received: from e23smtp03.au.ibm.com ([202.81.31.145]:39979 "EHLO e23smtp03.au.ibm.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752656Ab3COCfU (ORCPT ); Thu, 14 Mar 2013 22:35:20 -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 v3 4/5] introduce zero-filled page stat count Date: Fri, 15 Mar 2013 10:34:19 +0800 Message-Id: <1363314860-22731-5-git-send-email-liwanp@linux.vnet.ibm.com> X-Mailer: git-send-email 1.7.5.4 In-Reply-To: <1363314860-22731-1-git-send-email-liwanp@linux.vnet.ibm.com> References: <1363314860-22731-1-git-send-email-liwanp@linux.vnet.ibm.com> X-Content-Scanned: Fidelis XPS MAILER x-cbid: 13031502-6102-0000-0000-0000032863A5 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 2605 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 ef8c960..bc7ccbb 100644 --- a/drivers/staging/zcache/zcache-main.c +++ b/drivers/staging/zcache/zcache-main.c @@ -197,6 +197,7 @@ 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_zero_filled_pages; #ifdef CONFIG_DEBUG_FS #include @@ -258,6 +259,7 @@ 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("zero_filled_pages", S_IRUGO, root, &zcache_zero_filled_pages); return 0; } #undef zdebugfs @@ -327,6 +329,7 @@ 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: zero_filled_pages=%zd\n", zcache_zero_filled_pages); } #endif @@ -563,6 +566,7 @@ static void *zcache_pampd_eph_create(char *data, size_t size, bool raw, kunmap_atomic(user_mem); clen = 0; zero_filled = true; + zcache_zero_filled_pages++; goto got_pampd; } kunmap_atomic(user_mem); @@ -646,6 +650,7 @@ static void *zcache_pampd_pers_create(char *data, size_t size, bool raw, kunmap_atomic(user_mem); clen = 0; zero_filled = true; + zcache_zero_filled_pages++; goto got_pampd; } kunmap_atomic(user_mem); @@ -867,6 +872,7 @@ static int zcache_pampd_get_data_and_free(char *data, size_t *sizep, bool raw, zpages = 1; if (!raw) *sizep = PAGE_SIZE; + zcache_zero_filled_pages--; goto zero_fill; } @@ -923,6 +929,7 @@ static void zcache_pampd_free(void *pampd, struct tmem_pool *pool, zero_filled = true; zsize = 0; zpages = 1; + zcache_zero_filled_pages--; } 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/