Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754663Ab0GHKmE (ORCPT ); Thu, 8 Jul 2010 06:42:04 -0400 Received: from fgwmail5.fujitsu.co.jp ([192.51.44.35]:49221 "EHLO fgwmail5.fujitsu.co.jp" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752631Ab0GHKmB (ORCPT ); Thu, 8 Jul 2010 06:42:01 -0400 X-SecurityPolicyCheck-FJ: OK by FujitsuOutboundMailChecker v1.3.1 From: KOSAKI Motohiro To: LKML Subject: Re: [PATCH] reduce stack usage of node_read_meminfo() Cc: kosaki.motohiro@jp.fujitsu.com, linux-mm , Andrew Morton In-Reply-To: <20100708181629.CD3C.A69D9226@jp.fujitsu.com> References: <20100708181629.CD3C.A69D9226@jp.fujitsu.com> Message-Id: <20100708194107.CD45.A69D9226@jp.fujitsu.com> MIME-Version: 1.0 Content-Type: text/plain; charset="US-ASCII" Content-Transfer-Encoding: 7bit X-Mailer: Becky! ver. 2.50.07 [ja] Date: Thu, 8 Jul 2010 19:41:57 +0900 (JST) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 4172 Lines: 108 Grr, I did sent old ver. right patch is here ;-) sorry. ================================================ Subject: [PATCH] reduce stack usage of node_read_meminfo() Now, cmpilation node_read_meminfo() output following warning. Because it has very large sprintf() argument. drivers/base/node.c: In function 'node_read_meminfo': drivers/base/node.c:139: warning: the frame size of 848 bytes is larger than 512 bytes This patch fixes it by splitting sprintf() in three parts. This also reduce CONFIG_HIGHMEM mess a bit. Signed-off-by: KOSAKI Motohiro --- drivers/base/node.c | 46 +++++++++++++++++++++++----------------------- 1 files changed, 23 insertions(+), 23 deletions(-) diff --git a/drivers/base/node.c b/drivers/base/node.c index 2bdd8a9..2872e86 100644 --- a/drivers/base/node.c +++ b/drivers/base/node.c @@ -66,8 +66,7 @@ static ssize_t node_read_meminfo(struct sys_device * dev, struct sysinfo i; si_meminfo_node(&i, nid); - - n = sprintf(buf, "\n" + n = sprintf(buf, "Node %d MemTotal: %8lu kB\n" "Node %d MemFree: %8lu kB\n" "Node %d MemUsed: %8lu kB\n" @@ -78,13 +77,33 @@ static ssize_t node_read_meminfo(struct sys_device * dev, "Node %d Active(file): %8lu kB\n" "Node %d Inactive(file): %8lu kB\n" "Node %d Unevictable: %8lu kB\n" - "Node %d Mlocked: %8lu kB\n" + "Node %d Mlocked: %8lu kB\n", + nid, K(i.totalram), + nid, K(i.freeram), + nid, K(i.totalram - i.freeram), + nid, K(node_page_state(nid, NR_ACTIVE_ANON) + + node_page_state(nid, NR_ACTIVE_FILE)), + nid, K(node_page_state(nid, NR_INACTIVE_ANON) + + node_page_state(nid, NR_INACTIVE_FILE)), + nid, K(node_page_state(nid, NR_ACTIVE_ANON)), + nid, K(node_page_state(nid, NR_INACTIVE_ANON)), + nid, K(node_page_state(nid, NR_ACTIVE_FILE)), + nid, K(node_page_state(nid, NR_INACTIVE_FILE)), + nid, K(node_page_state(nid, NR_UNEVICTABLE)), + nid, K(node_page_state(nid, NR_MLOCK))); + #ifdef CONFIG_HIGHMEM + n += sprintf(buf + n, "Node %d HighTotal: %8lu kB\n" "Node %d HighFree: %8lu kB\n" "Node %d LowTotal: %8lu kB\n" - "Node %d LowFree: %8lu kB\n" + "Node %d LowFree: %8lu kB\n", + nid, K(i.totalhigh), + nid, K(i.freehigh), + nid, K(i.totalram - i.totalhigh), + nid, K(i.freeram - i.freehigh)); #endif + n += sprintf(buf + n, "Node %d Dirty: %8lu kB\n" "Node %d Writeback: %8lu kB\n" "Node %d FilePages: %8lu kB\n" @@ -99,25 +118,6 @@ static ssize_t node_read_meminfo(struct sys_device * dev, "Node %d Slab: %8lu kB\n" "Node %d SReclaimable: %8lu kB\n" "Node %d SUnreclaim: %8lu kB\n", - nid, K(i.totalram), - nid, K(i.freeram), - nid, K(i.totalram - i.freeram), - nid, K(node_page_state(nid, NR_ACTIVE_ANON) + - node_page_state(nid, NR_ACTIVE_FILE)), - nid, K(node_page_state(nid, NR_INACTIVE_ANON) + - node_page_state(nid, NR_INACTIVE_FILE)), - nid, K(node_page_state(nid, NR_ACTIVE_ANON)), - nid, K(node_page_state(nid, NR_INACTIVE_ANON)), - nid, K(node_page_state(nid, NR_ACTIVE_FILE)), - nid, K(node_page_state(nid, NR_INACTIVE_FILE)), - nid, K(node_page_state(nid, NR_UNEVICTABLE)), - nid, K(node_page_state(nid, NR_MLOCK)), -#ifdef CONFIG_HIGHMEM - nid, K(i.totalhigh), - nid, K(i.freehigh), - nid, K(i.totalram - i.totalhigh), - nid, K(i.freeram - i.freehigh), -#endif nid, K(node_page_state(nid, NR_FILE_DIRTY)), nid, K(node_page_state(nid, NR_WRITEBACK)), nid, K(node_page_state(nid, NR_FILE_PAGES)), -- 1.6.5.2 -- 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/