From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S936757AbZDCUSO (ORCPT ); Fri, 3 Apr 2009 16:18:14 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1760611AbZDCUR4 (ORCPT ); Fri, 3 Apr 2009 16:17:56 -0400 Received: from smtp1.linux-foundation.org ([140.211.169.13]:34511 "EHLO smtp1.linux-foundation.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1757182AbZDCUR4 (ORCPT ); Fri, 3 Apr 2009 16:17:56 -0400 Date: Fri, 3 Apr 2009 13:14:00 -0700 (PDT) From: Linus Torvalds X-X-Sender: torvalds@localhost.localdomain To: Jeff Garzik cc: Chris Mason , Andrew Morton , David Rees , Linux Kernel Mailing List Subject: Re: Linux 2.6.29 In-Reply-To: <49D66C0E.5090301@garzik.org> Message-ID: References: <1238758370.32764.5.camel@think.oraclecorp.com> <49D66C0E.5090301@garzik.org> User-Agent: Alpine 2.00 (LFD 1167 2008-08-23) MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Fri, 3 Apr 2009, Jeff Garzik wrote: > > Yeah, it's a no-name SSD. > > I've attached 'hdparm -I' in case anyone is curious. It's from newegg.com, so > nothing NDA'd or sekrit. Hmm. Does it do ok on the "random write" test? There's a few non-intel controllers that are fine - apparently the newer samsung ones, and the one from Indilinx. But I _think_ G.SKILL uses those horribly broken JMicron controllers. Judging by your performance numbers, it's the slightly fancier double controller version (ie basically an internal RAID0 of two identical JMicron controllers, each handling half of the flash chips). Try a random write test. If it's the JMicron controllers, performance will plummet to a few tens of kilobytes per second. Linus