Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753178Ab2BQDRy (ORCPT ); Thu, 16 Feb 2012 22:17:54 -0500 Received: from gate.crashing.org ([63.228.1.57]:49023 "EHLO gate.crashing.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751356Ab2BQDRx (ORCPT ); Thu, 16 Feb 2012 22:17:53 -0500 Message-ID: <1329448660.2892.42.camel@pasglop> Subject: RE: [PATCH V2 RESEND] fsl-sata: I/O load balancing From: Benjamin Herrenschmidt To: Liu Qiang-B32616 Cc: "jgarzik@pobox.com" , "linux-ide@vger.kernel.org" , "linuxppc-dev@lists.ozlabs.org" , "linux-kernel@vger.kernel.org" Date: Fri, 17 Feb 2012 14:17:40 +1100 In-Reply-To: References: <1329284944-17943-1-git-send-email-qiang.liu@freescale.com> <1329439216.2892.36.camel@pasglop> Content-Type: text/plain; charset="UTF-8" X-Mailer: Evolution 3.2.2- Content-Transfer-Encoding: 7bit Mime-Version: 1.0 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1099 Lines: 25 On Fri, 2012-02-17 at 01:54 +0000, Liu Qiang-B32616 wrote: > The default will be set in a common interface fsl_sata_set_irq_coalescing when > initialize the controller. This interface will check the range of intr count > and ticks and make sure the values are reasonably. Allright, but the current defaults are basically no coalescing right ? > It's hard to find a aggressive value to adapt all scenarios, so I use echo to adjust > the value. I remember P5020 have some performance issue, I will check it. > BTW, which filesystem do you use? Ext2 is lower than ext4 because metadata is > continuously wrote to disk. You can try ext4 or xfs. ext3 at the moment, I plan to switch to ext4 when I finish that fsck pass which is taking hours... I am not aware of the 5020 performance issues, is this something documented and/or fixable ? Cheers, Ben. -- 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/