From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail203.messagelabs.com (mail203.messagelabs.com [216.82.254.243]) by kanga.kvack.org (Postfix) with ESMTP id DE9D28D0001 for ; Fri, 26 Nov 2010 03:09:29 -0500 (EST) Date: Fri, 26 Nov 2010 00:09:03 -0800 From: Andrew Morton Subject: Re: [RFC][PATCH] Cross Memory Attach v2 (resend) Message-Id: <20101126000903.df846d3e.akpm@linux-foundation.org> In-Reply-To: <20101126080624.GA26764@elte.hu> References: <20101122122847.3585b447@lilo> <20101122130527.c13c99d3.akpm@linux-foundation.org> <20101126080624.GA26764@elte.hu> Mime-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit Sender: owner-linux-mm@kvack.org To: Ingo Molnar Cc: Christopher Yeoh , linux-kernel@vger.kernel.org, Linus Torvalds , linux-mm@kvack.org, Brice Goglin , "H. Peter Anvin" List-ID: On Fri, 26 Nov 2010 09:06:24 +0100 Ingo Molnar wrote: > > * Andrew Morton wrote: > > > On Mon, 22 Nov 2010 12:28:47 +1030 > > Christopher Yeoh wrote: > > > > > Resending just in case the previous mail was missed rather than ignored :-) > > > I'd appreciate any comments.... > > > > Fear, uncertainty, doubt and resistance! > > > > We have a bit of a track record of adding cool-looking syscalls and > > then regretting it a few years later. Few people use them, and maybe > > they weren't so cool after all, and we have to maintain them for ever. > > They are often cut off at the libc level and never get into apps. > > If we had tools/libc/ (mapped by the kernel automagically via the vDSO), where > people could add new syscall usage to actual, existing, real-life libc functions, > where the improvements could thus propagate into thousands of apps immediately, > without requiring any rebuild of apps or even any touching of the user-space > installation, we'd probably have _much_ more lively development in this area. > > Right now it's slow and painful, and few new syscalls can break through the brick > wall of implementation latency, app adoption disinterest due to backwards > compatibility limitations and the resulting inevitable lack of testing and lack of > tangible utility. Can't people use libc's syscall(2)? -- 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/ . Fight unfair telecom policy in Canada: sign http://dissolvethecrtc.ca/ Don't email: email@kvack.org