Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752961Ab0ASOPB (ORCPT ); Tue, 19 Jan 2010 09:15:01 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1751997Ab0ASOPA (ORCPT ); Tue, 19 Jan 2010 09:15:00 -0500 Received: from mx1.redhat.com ([209.132.183.28]:57842 "EHLO mx1.redhat.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751439Ab0ASOO7 (ORCPT ); Tue, 19 Jan 2010 09:14:59 -0500 Date: Tue, 19 Jan 2010 16:14:36 +0200 From: Gleb Natapov To: Minchan Kim Cc: Pekka Enberg , Alan Cox , linux-mm@kvack.org, kosaki.motohiro@jp.fujitsu.com, linux-kernel@vger.kernel.org, linux-api@vger.kernel.org, akpm@linux-foundation.org, andrew.c.morrow@gmail.com, "Paul E. McKenney" Subject: Re: [PATCH v6] add MAP_UNLOCKED mmap flag Message-ID: <20100119141436.GA5238@redhat.com> References: <20100118141938.GI30698@redhat.com> <84144f021001180805q4d1203b8qab8ccb1de87b2866@mail.gmail.com> <20100118170816.GA22111@redhat.com> <84144f021001181009m52f7eaebp2bd746f92de08da9@mail.gmail.com> <20100118181942.GD22111@redhat.com> <20100118191031.0088f49a@lxorguk.ukuu.org.uk> <20100119071734.GG14345@redhat.com> <84144f021001182337o274c8ed3q8ce60581094bc2b9@mail.gmail.com> <20100119075205.GI14345@redhat.com> <1263910043.2163.24.camel@barrios-desktop> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <1263910043.2163.24.camel@barrios-desktop> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1045 Lines: 26 On Tue, Jan 19, 2010 at 11:07:23PM +0900, Minchan Kim wrote: > On Tue, 2010-01-19 at 09:52 +0200, Gleb Natapov wrote: > > > In my case (virtualization) I want to test/profile guest under heavy swapping > > of a guests memory, so I intentionally create memory shortage by creating > > You mean "guest memory" that is area emulated DRAM in qemu? > It is anonymous vma. > > > guest much large then host memory, but I want system to swap out only > > guest's memory. > > Couldn't you use MADV_SEQUENTIAL on only guest memory area? > It doesn't make side effect about readahead since it's anon area. > And it would make do best effort to swap out guest's memory. > I can try, should be better then nothing I guess. Doesn't guaranty that emulator memory will not be swapped out though. -- Gleb. -- 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/