From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1755604AbZHPSYY (ORCPT ); Sun, 16 Aug 2009 14:24:24 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1754194AbZHPSYX (ORCPT ); Sun, 16 Aug 2009 14:24:23 -0400 Received: from cantor2.suse.de ([195.135.220.15]:47489 "EHLO mx2.suse.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751573AbZHPSYW (ORCPT ); Sun, 16 Aug 2009 14:24:22 -0400 Subject: Re: Discard support (was Re: [PATCH] swap: send callback when swap slot is freed) From: James Bottomley To: Mark Lord Cc: Arjan van de Ven , Alan Cox , Chris Worley , Matthew Wilcox , Bryan Donlan , david@lang.hm, Greg Freemyer , Markus Trippelsdorf , Matthew Wilcox , Hugh Dickins , Nitin Gupta , Ingo Molnar , Peter Zijlstra , linux-kernel@vger.kernel.org, linux-mm@kvack.org, linux-scsi@vger.kernel.org, linux-ide@vger.kernel.org, Linux RAID In-Reply-To: <4A884D9C.3060603@rtr.ca> References: <200908122007.43522.ngupta@vflare.org> <20090813151312.GA13559@linux.intel.com> <20090813162621.GB1915@phenom2.trippelsdorf.de> <87f94c370908131115r680a7523w3cdbc78b9e82373c@mail.gmail.com> <3e8340490908131354q167840fcv124ec56c92bbb830@mail.gmail.com> <4A85E0DC.9040101@rtr.ca> <20090814234539.GE27148@parisc-linux.org> <1250341176.4159.2.camel@mulgrave.site> <4A86B69C.7090001@rtr.ca> <1250344518.4159.4.camel@mulgrave.site> <20090816150530.2bae6d1f@lxorguk.ukuu.org.uk> <20090816083434.2ce69859@infradead.org> <1250437927.3856.119.camel@mulgrave.site> <4A8834B6.2070104@rtr.ca> <1250446047.3856.273.camel@mulgrave.site> <4A884D9C.3060603@rtr.ca> Content-Type: text/plain Date: Sun, 16 Aug 2009 13:24:12 -0500 Message-Id: <1250447052.3856.294.camel@mulgrave.site> Mime-Version: 1.0 X-Mailer: Evolution 2.24.1.1 Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Sun, 2009-08-16 at 14:19 -0400, Mark Lord wrote: > James Bottomley wrote: > > > > Heh, OS writers not having access to the devices is about par for the > > current course. > .. > > Pity the Linux Foundation doesn't simply step in and supply hardware > to us for new tech like this. Cheap for them, expensive for folks like me. Um, to give a developer a selection of manufacturers' SSDs at retail prices, you're talking several thousand dollars ... in these lean times, that would be two or three developers not getting travel sponsorship per chosen SSD recipient. It's not a worthwhile tradeoff. The best the LF can likely do is try to explain to the manufacturers that handing out samples at linux conferences (like plumbers) is in their own interests. It can also manage the handout if necessary through its HW lending library. James