From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail202.messagelabs.com (mail202.messagelabs.com [216.82.254.227]) by kanga.kvack.org (Postfix) with SMTP id 4DA1D6B004D for ; Thu, 12 Nov 2009 21:37:46 -0500 (EST) Received: from m4.gw.fujitsu.co.jp ([10.0.50.74]) by fgwmail5.fujitsu.co.jp (Fujitsu Gateway) with ESMTP id nAD2bifH004680 for (envelope-from kamezawa.hiroyu@jp.fujitsu.com); Fri, 13 Nov 2009 11:37:44 +0900 Received: from smail (m4 [127.0.0.1]) by outgoing.m4.gw.fujitsu.co.jp (Postfix) with ESMTP id D071345DE79 for ; Fri, 13 Nov 2009 11:37:42 +0900 (JST) Received: from s4.gw.fujitsu.co.jp (s4.gw.fujitsu.co.jp [10.0.50.94]) by m4.gw.fujitsu.co.jp (Postfix) with ESMTP id 9D3FF45DE6F for ; Fri, 13 Nov 2009 11:37:42 +0900 (JST) Received: from s4.gw.fujitsu.co.jp (localhost.localdomain [127.0.0.1]) by s4.gw.fujitsu.co.jp (Postfix) with ESMTP id 52BC2E18006 for ; Fri, 13 Nov 2009 11:37:42 +0900 (JST) Received: from m107.s.css.fujitsu.com (m107.s.css.fujitsu.com [10.249.87.107]) by s4.gw.fujitsu.co.jp (Postfix) with ESMTP id F03981DB803E for ; Fri, 13 Nov 2009 11:37:41 +0900 (JST) Date: Fri, 13 Nov 2009 11:35:02 +0900 From: KAMEZAWA Hiroyuki Subject: Re: [PATCH] show per-process swap usage via procfs v3 Message-Id: <20091113113502.9c5a93b7.kamezawa.hiroyu@jp.fujitsu.com> In-Reply-To: <20091113105112.c72cf8f5.kamezawa.hiroyu@jp.fujitsu.com> References: <20091104152426.eacc894f.kamezawa.hiroyu@jp.fujitsu.com> <28c262360911050711k47a63896xe4915157664cb822@mail.gmail.com> <20091106084806.7503b165.kamezawa.hiroyu@jp.fujitsu.com> <20091106134030.a94665d1.kamezawa.hiroyu@jp.fujitsu.com> <28c262360911060719y45f4b58ex2f13853f0d142656@mail.gmail.com> <20091111112539.71dfac31.kamezawa.hiroyu@jp.fujitsu.com> <20091113105112.c72cf8f5.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: Christoph Lameter , Minchan Kim , "linux-kernel@vger.kernel.org" , "linux-mm@kvack.org" , "hugh.dickins@tiscali.co.uk" , akpm@linux-foundation.org, "kosaki.motohiro@jp.fujitsu.com" List-ID: On Fri, 13 Nov 2009 10:51:12 +0900 KAMEZAWA Hiroyuki wrote: > > > @@ -597,7 +600,9 @@ copy_one_pte(struct mm_struct *dst_mm, s > > > &src_mm->mmlist); > > > spin_unlock(&mmlist_lock); > > > } > > > - if (is_write_migration_entry(entry) && > > > + if (!non_swap_entry(entry)) > > > + rss[2]++; > > > + else if (is_write_migration_entry(entry) && > > > is_cow_mapping(vm_flags)) { > > > /* > > > > What are the implications for fork performance? > > This path is executed when page table entry contains a entry of > !pte_none() && !pte_present(). > > There are not very big chance to reach here.(this path is under unlikely()). > [before] text data bss dec hex filename 6649003 3221828 10232816 20103647 132c1df vmlinux [after] text data bss dec hex filename 6649243 3221828 10232816 20103887 132c2cf vmlinux Now, 240 bytes of text size..Hmm. Thanks, -Kame -- 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