Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1757648Ab3G3V2X (ORCPT ); Tue, 30 Jul 2013 17:28:23 -0400 Received: from mail.linuxfoundation.org ([140.211.169.12]:47520 "EHLO mail.linuxfoundation.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1756140Ab3G3V2V (ORCPT ); Tue, 30 Jul 2013 17:28:21 -0400 Date: Tue, 30 Jul 2013 14:28:20 -0700 From: Andrew Morton To: Dave Kleikamp Cc: linux-kernel@vger.kernel.org, linux-fsdevel@vger.kernel.org, "Maxim V. Patlasov" , Zach Brown Subject: Re: [PATCH V8 00/33] loop: Issue O_DIRECT aio using bio_vec Message-Id: <20130730142820.313f1af6827276df31913106@linux-foundation.org> In-Reply-To: <1374774659-13121-1-git-send-email-dave.kleikamp@oracle.com> References: <1374774659-13121-1-git-send-email-dave.kleikamp@oracle.com> X-Mailer: Sylpheed 3.2.0beta5 (GTK+ 2.24.10; x86_64-pc-linux-gnu) Mime-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 921 Lines: 19 On Thu, 25 Jul 2013 12:50:26 -0500 Dave Kleikamp wrote: > This patch series adds a kernel interface to fs/aio.c so that kernel code can > issue concurrent asynchronous IO to file systems. It adds an aio command and > file system methods which specify io memory with pages instead of userspace > addresses. > > This series was written to reduce the current overhead loop imposes by > performing synchronus buffered file system IO from a kernel thread. These > patches turn loop into a light weight layer that translates bios into iocbs. Do you have any performance numbers? Does anyone care much about loop performance? What's the value here? -- 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/