Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753529AbZKWOMH (ORCPT ); Mon, 23 Nov 2009 09:12:07 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1753832AbZKWOMG (ORCPT ); Mon, 23 Nov 2009 09:12:06 -0500 Received: from atrey.karlin.mff.cuni.cz ([195.113.26.193]:42700 "EHLO atrey.karlin.mff.cuni.cz" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753967AbZKWOMD (ORCPT ); Mon, 23 Nov 2009 09:12:03 -0500 Date: Mon, 23 Nov 2009 00:37:49 +0100 From: Pavel Machek To: Matthew Garrett Cc: Kay Sievers , David Zeuthen , linux-kernel@vger.kernel.org, axboe@kernel.dk, linux-hotplug@vger.kernel.org Subject: Re: [PATCH] [RFC] Add support for uevents on block device idle changes Message-ID: <20091122233749.GA9699@ucw.cz> References: <1258468659-5446-1-git-send-email-mjg@redhat.com> <1258474180.16176.62.camel@localhost.localdomain> <20091117185742.GA19829@srcf.ucam.org> <20091118194053.GB12944@srcf.ucam.org> <20091118195342.GA13627@srcf.ucam.org> <20091118200712.GA14026@srcf.ucam.org> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20091118200712.GA14026@srcf.ucam.org> User-Agent: Mutt/1.5.18 (2008-05-17) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 939 Lines: 21 On Wed 2009-11-18 20:07:12, Matthew Garrett wrote: > On Wed, Nov 18, 2009 at 09:03:21PM +0100, Kay Sievers wrote: > > > Sure, but what's wrong with reading that file every 50 seconds? Almost > > all boxes poll for media changes of optical drives and usb card > > readers anyway, so it's not that we are not doing stuff like this > > already. > > We poll for media because there's no event-based way of avoiding it - in > this case there is. ...when you add overhead to every disk operation. I'd say that polling once in 50 seconds is preferable to that. -- (english) http://www.livejournal.com/~pavelmachek (cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html -- 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/