Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S932503Ab0HDDXN (ORCPT ); Tue, 3 Aug 2010 23:23:13 -0400 Received: from mail3.microsoft.com ([131.107.115.214]:47757 "EHLO smtp.microsoft.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S932419Ab0HDDXL convert rfc822-to-8bit (ORCPT ); Tue, 3 Aug 2010 23:23:11 -0400 From: Hank Janssen To: Greg KH 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 Thread-Topic: [PATCH 5/6] staging: hv: Increased storvsc ringbuffer and max_io_requests Thread-Index: AcszLcUhHXq5Q0YpSPmrzukUj2qQ+AAP8+aAAAV/g1A= Date: Wed, 4 Aug 2010 03:23:09 +0000 Message-ID: <8AFC7968D54FB448A30D8F38F259C56223FE59CB@TK5EX14MBXC114.redmond.corp.microsoft.com> References: <8AFC7968D54FB448A30D8F38F259C56223FD1D36@TK5EX14MBXC114.redmond.corp.microsoft.com> <20100803174005.GC1455@suse.de> In-Reply-To: <20100803174005.GC1455@suse.de> Accept-Language: en-US Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: x-originating-ip: [157.54.123.12] Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 8BIT MIME-Version: 1.0 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1249 Lines: 35 >>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. Thanks, Hank. -- 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/