From mboxrd@z Thu Jan 1 00:00:00 1970 From: Minchan Kim Subject: Re: [PATCH v6] add MAP_UNLOCKED mmap flag Date: Tue, 19 Jan 2010 23:07:23 +0900 Message-ID: <1263910043.2163.24.camel@barrios-desktop> References: <20100118133755.GG30698@redhat.com> <84144f021001180609r4d7fbbd0p972d5bc0e227d09a@mail.gmail.com> <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> Mime-Version: 1.0 Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: 7bit Return-path: In-Reply-To: <20100119075205.GI14345@redhat.com> Sender: owner-linux-mm@kvack.org To: Gleb Natapov 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" List-Id: linux-api@vger.kernel.org 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. -- Kind regards, Minchan Kim -- 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