Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753670AbcDNLsC (ORCPT ); Thu, 14 Apr 2016 07:48:02 -0400 Received: from mail-oi0-f66.google.com ([209.85.218.66]:33755 "EHLO mail-oi0-f66.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752593AbcDNLsA (ORCPT ); Thu, 14 Apr 2016 07:48:00 -0400 From: Ming Lei To: Jens Axboe , linux-kernel@vger.kernel.org Cc: linux-block@vger.kernel.org, Christoph Hellwig , Al Viro , Ming Lei , drbd-dev@lists.linbit.com (open list:DRBD DRIVER), Jan Kara , Keith Busch , Kent Overstreet , "Kirill A. Shutemov" , Mike Snitzer , Shaohua Li , Tejun Heo , xfs@oss.sgi.com (open list:XFS FILESYSTEM) Subject: [PATCH v4 0/8] block: prepare for multipage bvecs Date: Thu, 14 Apr 2016 19:46:53 +0800 Message-Id: <1460634438-26530-1-git-send-email-ming.lei@canonical.com> X-Mailer: git-send-email 1.9.1 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 2219 Lines: 62 Hi, Interests[1] have been shown in multipage bvecs, so this patchset try to prepare for the support and do two things: 1) the 1st 4 patches use bvec iterator to implement iterate_bvec(), then we can drop the non-standard way for iterating bvec, which can be thought as a good cleanup for lib/iov_iter.c 2) remove BIO_MAX_SECTORS & BIO_MAX_SIZE, and now there is only one user for each. Once multipage bvecs is introduced, one bio may hold lots of sectors, and we should always use sort of BIO_MAX_VECS which should be introduced in future and is similiar with current BIO_MAX_PAGES. xfstests(-a auto) have been run over ext4/xfs and no regression found by this patchset. V4: - make xfstests cover xfs - rebase on for-next of block tree V3: - include kenrel.h & bug.h in bvec.h for fix comiling failure on arm as reported by 0day ktest - build test on arm & arm64 V2: - rename bvec_iter.h as bvec.h - always include bvec.h into blk_types.h as suggested by Christoph V1: - don't move BIO_MAX_* to bvec_iter.h as pointed out by Christoph - run xfstests against v4.6-rc1-next-20160329 - add Reviewed-by - for 1,4 and 5, Reviewd-by not added, Christoph still expressed 'this looks fine to me.' Ming Lei (10): block: move bvec iterator into include/linux/bvec.h block: move two bvec structure into bvec.h block: mark 1st parameter of bvec_iter_advance as const iov_iter: use bvec iterator to implement iterate_bvec() fs: xfs: replace BIO_MAX_SECTORS with BIO_MAX_PAGES block: bio: remove BIO_MAX_SECTORS block: drbd: avoid to use BIO_MAX_SIZE block: bio: remove BIO_MAX_SIZE block: make sure big bio is splitted into at most 256 bvecs block: allow to merge bios if splitting because of big bvecs num block/blk-merge.c | 35 ++++++++++++++-- drivers/block/drbd/drbd_int.h | 4 +- fs/xfs/xfs_buf.c | 4 +- include/linux/bio.h | 52 ----------------------- include/linux/blk_types.h | 22 +--------- include/linux/bvec.h | 96 +++++++++++++++++++++++++++++++++++++++++++ lib/iov_iter.c | 30 +++++--------- 7 files changed, 142 insertions(+), 101 deletions(-) create mode 100644 include/linux/bvec.h -- 1.9.1