From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail138.messagelabs.com (mail138.messagelabs.com [216.82.249.35]) by kanga.kvack.org (Postfix) with ESMTP id E79AE6B004F for ; Mon, 17 Aug 2009 15:24:07 -0400 (EDT) Subject: Re: Discard support (was Re: [PATCH] swap: send callback when swap slot is freed) From: James Bottomley In-Reply-To: <20090817191250.GA1816@infradead.org> References: <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> <20090816165943.GA26983@infradead.org> <1250517372.3844.3.camel@mulgrave.site> <20090817141038.GB11966@parisc-linux.org> <20090817191250.GA1816@infradead.org> Content-Type: text/plain Date: Mon, 17 Aug 2009 19:24:02 +0000 Message-Id: <1250537042.7858.46.camel@mulgrave.site> Mime-Version: 1.0 Content-Transfer-Encoding: 7bit Sender: owner-linux-mm@kvack.org To: Christoph Hellwig Cc: Matthew Wilcox , Arjan van de Ven , Alan Cox , Mark Lord , Chris Worley , 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 List-ID: On Mon, 2009-08-17 at 15:12 -0400, Christoph Hellwig wrote: > On Mon, Aug 17, 2009 at 08:10:38AM -0600, Matthew Wilcox wrote: > > On Mon, Aug 17, 2009 at 08:56:12AM -0500, James Bottomley wrote: > > > The testing was initially done to see if the initial maximal discard > > > proposal from LSF09 was a viable approach (which it wasn't given the > > > time taken to UNMAP). > > > > It would be nice if that feedback could be made public instead of it > > leaking out in dribs and drabs like this. > > Yeah, I don't remember hearing about anything like this either. Well you were both in #storage when it got discussed on 4 May. However, I'm hopeful that the array vendors will make a more direct statement of the capabilities shortly. James -- 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/ . Don't email: email@kvack.org