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 C18516B004D for ; Sun, 16 Aug 2009 18:07:09 -0400 (EDT) Message-ID: <4A8882E0.5070207@garzik.org> Date: Sun, 16 Aug 2009 18:06:24 -0400 From: Jeff Garzik MIME-Version: 1.0 Subject: Re: Discard support 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> In-Reply-To: Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Sender: owner-linux-mm@kvack.org To: Roland Dreier Cc: James Bottomley , Arjan van de Ven , Alan Cox , Mark Lord , 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 List-ID: On 08/16/2009 05:50 PM, Roland Dreier wrote: > > > Well, yes and no ... a lot of SSDs don't actually implement NCQ, so the > > impact to them will be less ... although I think enterprise class SSDs > > do implement NCQ. > > Really? Which SSDs don't implement NCQ? ata3: SATA link up 3.0 Gbps (SStatus 123 SControl 300) ata3.00: ATA-8: G.SKILL 128GB SSD, 02.10104, max UDMA/100 ata3.00: 250445824 sectors, multi 0: LBA ata3.00: configured for UDMA/100 for one... -- 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