Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1758294Ab0HDRJx (ORCPT ); Wed, 4 Aug 2010 13:09:53 -0400 Received: from cantor2.suse.de ([195.135.220.15]:53625 "EHLO mx2.suse.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1758226Ab0HDRJv (ORCPT ); Wed, 4 Aug 2010 13:09:51 -0400 Date: Wed, 4 Aug 2010 10:08:38 -0700 From: Greg KH To: Hank Janssen Cc: "'linux-kernel@vger.kernel.org'" , "'devel@driverdev.osuosl.org'" , "'virtualization@lists.osdl.org'" , Haiyang Zhang Subject: Re: [PATCH 5/6] staging: hv: Increased storvsc ringbuffer and max_io_requests Message-ID: <20100804170838.GE28217@suse.de> References: <8AFC7968D54FB448A30D8F38F259C56223FD1D36@TK5EX14MBXC114.redmond.corp.microsoft.com> <20100803174005.GC1455@suse.de> <8AFC7968D54FB448A30D8F38F259C56223FE59CB@TK5EX14MBXC114.redmond.corp.microsoft.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <8AFC7968D54FB448A30D8F38F259C56223FE59CB@TK5EX14MBXC114.redmond.corp.microsoft.com> User-Agent: Mutt/1.5.20 (2009-06-14) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1456 Lines: 38 On Wed, Aug 04, 2010 at 03:23:09AM +0000, Hank Janssen wrote: > > >>And than Greg KH spoke these words: > >>On Tue, Aug 03, 2010 at 05:31:55PM +0000, Hank Janssen wrote: > > >From: Hank Janssen > > > > > >Increased storvsc ringbuffer and max_io_requests. This now more > > >closely mimics the numbers on Hyper-V. > > > >What do you mean by this? The max provided by the hypervisor? > > Max_IO is set to double from what it was before, Hyper-V allows it and > We have had appliance builder requests to see if it was a problem to increase > The number. > > Ringbuffer size for storvsc is now increased because I have seen > A few buffer problems on extremely busy systems. They where > Set pretty low before. And since max_io_requests is increased I > Really needed to increase the buffer as well. > > >> And will allow more IO requests to take place for the SCSI driver. > > > >Which means what, better throughput? Or just more outstanding requests and the same speed overall? > > It means better throughput of high load systems, else you get buffer > Contention. All good, care to included this in the changelog comment when you resend this whole series? thanks, greg k-h -- 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/