From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail138.messagelabs.com (mail138.messagelabs.com [216.82.249.35]) by kanga.kvack.org (Postfix) with SMTP id A78B46B006A for ; Wed, 13 Jan 2010 19:31:07 -0500 (EST) Received: from m2.gw.fujitsu.co.jp ([10.0.50.72]) by fgwmail7.fujitsu.co.jp (Fujitsu Gateway) with ESMTP id o0E0V52e019684 for (envelope-from kosaki.motohiro@jp.fujitsu.com); Thu, 14 Jan 2010 09:31:05 +0900 Received: from smail (m2 [127.0.0.1]) by outgoing.m2.gw.fujitsu.co.jp (Postfix) with ESMTP id DE7C845DE64 for ; Thu, 14 Jan 2010 09:31:04 +0900 (JST) Received: from s2.gw.fujitsu.co.jp (s2.gw.fujitsu.co.jp [10.0.50.92]) by m2.gw.fujitsu.co.jp (Postfix) with ESMTP id BC6BA45DE62 for ; Thu, 14 Jan 2010 09:31:04 +0900 (JST) Received: from s2.gw.fujitsu.co.jp (localhost.localdomain [127.0.0.1]) by s2.gw.fujitsu.co.jp (Postfix) with ESMTP id A3AF31DB803A for ; Thu, 14 Jan 2010 09:31:04 +0900 (JST) Received: from ml14.s.css.fujitsu.com (ml14.s.css.fujitsu.com [10.249.87.104]) by s2.gw.fujitsu.co.jp (Postfix) with ESMTP id 478511DB803F for ; Thu, 14 Jan 2010 09:31:04 +0900 (JST) From: KOSAKI Motohiro Subject: Re: [PATCH v5] add MAP_UNLOCKED mmap flag In-Reply-To: <20100113093119.GT7549@redhat.com> References: <20100113093119.GT7549@redhat.com> Message-Id: <20100114092845.D719.A69D9226@jp.fujitsu.com> MIME-Version: 1.0 Content-Type: text/plain; charset="US-ASCII" Content-Transfer-Encoding: 7bit Date: Thu, 14 Jan 2010 09:31:03 +0900 (JST) Sender: owner-linux-mm@kvack.org To: Gleb Natapov Cc: kosaki.motohiro@jp.fujitsu.com, linux-mm@kvack.org, linux-kernel@vger.kernel.org, linux-api@vger.kernel.org, akpm@linux-foundation.org List-ID: > If application does mlockall(MCL_FUTURE) it is no longer possible to mmap > file bigger than main memory or allocate big area of anonymous memory > in a thread safe manner. Sometimes it is desirable to lock everything > related to program execution into memory, but still be able to mmap > big file or allocate huge amount of memory and allow OS to swap them on > demand. MAP_UNLOCKED allows to do that. > > Signed-off-by: Gleb Natapov > --- > > I get reports that people find this useful, so resending. This description is still wrong. It doesn't describe why this patch is useful. -- 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