From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail137.messagelabs.com (mail137.messagelabs.com [216.82.249.19]) by kanga.kvack.org (Postfix) with SMTP id 547226B004F for ; Wed, 16 Sep 2009 22:47:10 -0400 (EDT) Received: from m5.gw.fujitsu.co.jp ([10.0.50.75]) by fgwmail7.fujitsu.co.jp (Fujitsu Gateway) with ESMTP id n8H2lE7Y030835 for (envelope-from kamezawa.hiroyu@jp.fujitsu.com); Thu, 17 Sep 2009 11:47:14 +0900 Received: from smail (m5 [127.0.0.1]) by outgoing.m5.gw.fujitsu.co.jp (Postfix) with ESMTP id 3D5FE45DE51 for ; Thu, 17 Sep 2009 11:47:14 +0900 (JST) Received: from s5.gw.fujitsu.co.jp (s5.gw.fujitsu.co.jp [10.0.50.95]) by m5.gw.fujitsu.co.jp (Postfix) with ESMTP id 1F1B945DE4F for ; Thu, 17 Sep 2009 11:47:14 +0900 (JST) Received: from s5.gw.fujitsu.co.jp (localhost.localdomain [127.0.0.1]) by s5.gw.fujitsu.co.jp (Postfix) with ESMTP id 8D6281DB8043 for ; Thu, 17 Sep 2009 11:56:25 +0900 (JST) Received: from m108.s.css.fujitsu.com (m108.s.css.fujitsu.com [10.249.87.108]) by s5.gw.fujitsu.co.jp (Postfix) with ESMTP id 8D6281DB8038 for ; Thu, 17 Sep 2009 11:56:25 +0900 (JST) Date: Thu, 17 Sep 2009 11:45:09 +0900 From: KAMEZAWA Hiroyuki Subject: [PATCH 3/3][mmotm] updateing size of kcore Message-Id: <20090917114509.a9eb9f2c.kamezawa.hiroyu@jp.fujitsu.com> In-Reply-To: <20090917114138.e14a1183.kamezawa.hiroyu@jp.fujitsu.com> References: <2375c9f90909160235m1f052df0qb001f8243ed9291e@mail.gmail.com> <1bc66b163326564dafb5a7dd8959fd56.squirrel@webmail-b.css.fujitsu.com> <20090917114138.e14a1183.kamezawa.hiroyu@jp.fujitsu.com> Mime-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit Sender: owner-linux-mm@kvack.org To: KAMEZAWA Hiroyuki Cc: Am?rico_Wang , Andrew Morton , linux-kernel@vger.kernel.org, linux-mm@kvack.org List-ID: After memory hotplug (or other events in future), kcore size can be modified. To update inode->i_size, we have to know inode/dentry but we can't get it from inside /proc directly. But considerinyg memory hotplug, kcore image is updated only when it's opened. Then, updating inode->i_size at open() is enough. Cc: WANG Cong Signed-off-by: KAMEZAWA Hiroyuki --- fs/proc/kcore.c | 5 +++++ 1 file changed, 5 insertions(+) Index: mmotm-2.6.31-Sep14/fs/proc/kcore.c =================================================================== --- mmotm-2.6.31-Sep14.orig/fs/proc/kcore.c +++ mmotm-2.6.31-Sep14/fs/proc/kcore.c @@ -546,6 +546,11 @@ static int open_kcore(struct inode *inod return -EPERM; if (kcore_need_update) kcore_update_ram(); + if (i_size_read(inode) != proc_root_kcore->size) { + mutex_lock(&inode->i_mutex); + i_size_write(inode, proc_root_kcore->size); + mutex_unlock(&inode->i_mutex); + } return 0; } -- 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