Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752346Ab0ATOQ6 (ORCPT ); Wed, 20 Jan 2010 09:16:58 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1752234Ab0ATOQ4 (ORCPT ); Wed, 20 Jan 2010 09:16:56 -0500 Received: from casper.infradead.org ([85.118.1.10]:56154 "EHLO casper.infradead.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751587Ab0ATOQz (ORCPT ); Wed, 20 Jan 2010 09:16:55 -0500 Subject: Re: [PATCH/RFC v1 0/2] Human readable performance event description in sysfs From: Peter Zijlstra To: =?UTF-8?Q?Micha=C5=82?= Nazarewicz Cc: Russell King - ARM Linux , Jamie Iles , jpihet@mvista.com, p.osciak@samsung.com, will.deacon@arm.com, linux-kernel@vger.kernel.org, kyungmin.park@samsung.com, mingo@elte.hu, m.szyprowski@samsung.com, linux-arm-kernel@lists.infradead.org, Tomasz Fujak In-Reply-To: References: <1263978706-15499-1-git-send-email-t.fujak@samsung.com> <1263978999.4283.823.camel@laptop> <20100120133145.GE4089@wear.picochip.com> <1263994779.4283.1057.camel@laptop> <20100120135553.GA22897@n2100.arm.linux.org.uk> <1263996080.4283.1064.camel@laptop> Content-Type: text/plain; charset="UTF-8" Date: Wed, 20 Jan 2010 15:16:19 +0100 Message-ID: <1263996979.4283.1066.camel@laptop> Mime-Version: 1.0 X-Mailer: Evolution 2.28.1 Content-Transfer-Encoding: 8bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 904 Lines: 18 On Wed, 2010-01-20 at 15:09 +0100, Michał Nazarewicz wrote: > On Wed, 20 Jan 2010 15:01:20 +0100, Peter Zijlstra wrote: > > It seems to me userspace might care about the exact platform they're > > running on. > > In my humble opinion, user space should never care about platform it's > running on. Interfaces provided by kernel should suffice to implement > abstraction layer between user space and hardware. If we abandon that > we're back in DOS times. But hey, again, that's just my opinion. Well, you're completely right. But the often sad reality is that perfect abstraction is either impossible or prohibitively expensive. -- 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/