Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1755801Ab3HBKth (ORCPT ); Fri, 2 Aug 2013 06:49:37 -0400 Received: from bombadil.infradead.org ([198.137.202.9]:48764 "EHLO bombadil.infradead.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1755696Ab3HBKte (ORCPT ); Fri, 2 Aug 2013 06:49:34 -0400 Date: Fri, 2 Aug 2013 03:49:30 -0700 From: Christoph Hellwig To: "Dilger, Andreas" Cc: Christoph Hellwig , Xiong Zhou , Greg Kroah-Hartman , Peng Tao , Paul Bolle , Jiri Kosina , "linux-kernel@vger.kernel.org" , "devel@driverdev.osuosl.org" Subject: Re: [PATCH v2] staging/lustre: lloop depends on BLOCK Message-ID: <20130802104930.GB1718@infradead.org> References: <20130801084539.GA13306@infradead.org> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: User-Agent: Mutt/1.5.21 (2010-09-15) X-SRS-Rewrite: SMTP reverse-path rewritten from by bombadil.infradead.org See http://www.infradead.org/rpr.html Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 761 Lines: 15 On Thu, Aug 01, 2013 at 07:57:22PM +0000, Dilger, Andreas wrote: > It provides significant performance improvement for network IO on Lustre. > It bypasses DLM locking in Lustre and the VFS layer on the client, copying > in the loop driver, and page-by-page IO submission in the normal IO path. Part of being upstream is improving existing drivers instead of copy and pasting them. Please take a Look at Shaggys in-kernel direct I/O and loop improvements and submit any incremental improvements ontop of that one. -- 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/