Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1030239AbXAKIuD (ORCPT ); Thu, 11 Jan 2007 03:50:03 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1030238AbXAKIuC (ORCPT ); Thu, 11 Jan 2007 03:50:02 -0500 Received: from ug-out-1314.google.com ([66.249.92.174]:35495 "EHLO ug-out-1314.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1030239AbXAKIuB (ORCPT ); Thu, 11 Jan 2007 03:50:01 -0500 DomainKey-Signature: a=rsa-sha1; c=nofws; d=gmail.com; s=beta; h=received:message-id:date:from:to:subject:cc:in-reply-to:mime-version:content-type:content-transfer-encoding:content-disposition:references; b=eh2XlRdmQq0iAEnnrRuYkLX+xEN0R30dxFbJq+wrDB813KG9Tw6QhtMt5/FgUtNepT9ZScCn1uojLyqSEi7FUIckhALti6BfKJzdNmCCJJeEvH5zdz2CIVzfKtFnQyC35iYh38ItKTmttthTVM2OWI+NkD1d4ulxb8jpHVh4jlM= Message-ID: Date: Thu, 11 Jan 2007 16:49:59 +0800 From: "Roy Huang" To: "Nick Piggin" Subject: Re: O_DIRECT question Cc: Aubrey , "Andrew Morton" , "Linus Torvalds" , "Hua Zhong" , "Hugh Dickins" , linux-kernel@vger.kernel.org, hch@infradead.org, kenneth.w.chen@intel.com, mjt@tls.msk.ru In-Reply-To: <45A5F157.9030001@yahoo.com.au> MIME-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Content-Disposition: inline References: <6d6a94c50701101857v2af1e097xde69e592135e54ae@mail.gmail.com> <6d6a94c50701102150w4c3b46d0w6981267e2b873d37@mail.gmail.com> <20070110220603.f3685385.akpm@osdl.org> <6d6a94c50701102245g6afe6aacxfcb2136baee5cbfa@mail.gmail.com> <20070110225720.7a46e702.akpm@osdl.org> <45A5E1B2.2050908@yahoo.com.au> <6d6a94c50701102354l7ab41a3bp4761566204f1d992@mail.gmail.com> <45A5F157.9030001@yahoo.com.au> Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1760 Lines: 41 There is already an EMBEDDED option in config, so I think linux is also supporting embedded system. There are many developers working on embedded system runing linux. They also hope to contribute to linux, then other embeded developers can share it. On 1/11/07, Nick Piggin wrote: > Aubrey wrote: > > On 1/11/07, Nick Piggin wrote: > > >> What you _really_ want to do is avoid large mallocs after boot, or use > >> a CPU with an mmu. I don't think nommu linux was ever intended to be a > >> simple drop in replacement for a normal unix kernel. > > > > > > Is there a position available working on mmu CPU? Joking, :) > > Yes, some problems are serious on nommu linux. But I think we should > > try to fix them not avoid them. > > Exactly, and the *real* fix is to modify userspace not to make > PAGE_SIZE > mallocs[*] if it is to be nommu friendly. It is the kernel hacks to do things > like limit cache size that are the bandaids. > > Of course, being an embedded system, if they work for you then that's > really fine and you can obviously ship with them. But they don't need to > go upstream. > > -- > SUSE Labs, Novell Inc. > Send instant messages to your online friends http://au.messenger.yahoo.com > > - > 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/ > - 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/