Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S941862AbdDTGWa (ORCPT ); Thu, 20 Apr 2017 02:22:30 -0400 Received: from mx2.suse.de ([195.135.220.15]:42486 "EHLO mx1.suse.de" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S941533AbdDTGW1 (ORCPT ); Thu, 20 Apr 2017 02:22:27 -0400 X-Amavis-Alert: BAD HEADER SECTION, Header field occurs more than once: "Cc" occurs 5 times From: NeilBrown To: Jens Axboe Date: Thu, 20 Apr 2017 15:38:48 +1000 Subject: [PATCH 00/11] block: assorted cleanup for bio splitting and cloning. Cc: linux-block@vger.kernel.org, linux-kernel@vger.kernel.org Cc: Ilya Dryomov , Sage Weil , Alex Elder , ceph-devel@vger.kernel.org Cc: Philipp Reisner , Lars Ellenberg , drbd-dev@lists.linbit.com Cc: Konrad Rzeszutek Wilk , "Roger Pau Monne" , xen-devel@lists.xenproject.org Cc: Kent Overstreet , linux-bcache@vger.kernel.org Message-ID: <149266645258.27388.14083229348123176454.stgit@noble> User-Agent: StGit/0.17.1-dirty MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 3057 Lines: 70 This series contains more work towards getting rid of the bioset work queues and generally improving the splitting and cloning of bios. The first three patches are similar to ones that I sent previously. They have been rebased on the current block for-next tree and improved a little. Specifically I no longer change all instances of bioset_create() to bioset_create_rescued(). Instead I only change those which cannot easily be shown to not need changing. The next patch fixes some issues with bounce.c. Most significantly it used to be called after blk_queue_split(), but now it is called before. This means that it can no longer assume that the bio has been split if it contained more than BIO_MAX_PAGES. Most of the rest change a number of bio_clone() calls to bio_clone_fast() as that is often what is needed. bio_clone() does not work with bios larger than BIO_MAX_PAGES, bio_clone_fast() does. Finally we remove bio_clone() (which is no longer used) and stop blk_bio_segment_split() from splitting after BIO_MAX_PAGES, as that is no longer necessary. --- NeilBrown (11): blk: remove bio_set arg from blk_queue_split() blk: make the bioset rescue_workqueue optional. blk: use non-rescuing bioset for q->bio_split. block: Improvements to bounce-buffer handling rbd: use bio_clone_fast() instead of bio_clone() drbd: use bio_clone_fast() instead of bio_clone() pktcdvd: use bio_clone_fast() instead of bio_clone() xen-blkfront: remove bio splitting. bcache: use kmalloc to allocate bio in bch_data_verify() block: remove bio_clone() and all references. block: don't check for BIO_MAX_PAGES in blk_bio_segment_split() Documentation/block/biodoc.txt | 2 + block/bio.c | 30 +++++++++++++++++++--- block/blk-core.c | 2 + block/blk-merge.c | 31 +++-------------------- block/blk-mq.c | 2 + block/bounce.c | 27 +++++++++++++++++++- drivers/block/drbd/drbd_int.h | 3 ++ drivers/block/drbd/drbd_main.c | 9 +++++++ drivers/block/drbd/drbd_req.c | 2 + drivers/block/drbd/drbd_req.h | 2 + drivers/block/pktcdvd.c | 14 ++++++++-- drivers/block/ps3vram.c | 2 + drivers/block/rbd.c | 16 +++++++++++- drivers/block/rsxx/dev.c | 2 + drivers/block/umem.c | 2 + drivers/block/xen-blkfront.c | 54 ++-------------------------------------- drivers/block/zram/zram_drv.c | 2 + drivers/lightnvm/rrpc.c | 2 + drivers/md/bcache/debug.c | 2 + drivers/md/bcache/super.c | 4 +-- drivers/md/dm-crypt.c | 2 + drivers/md/dm-io.c | 2 + drivers/md/dm.c | 5 ++-- drivers/md/md.c | 4 +-- drivers/s390/block/dcssblk.c | 2 + drivers/s390/block/xpram.c | 2 + include/linux/bio.h | 7 +---- include/linux/blkdev.h | 3 +- 28 files changed, 121 insertions(+), 116 deletions(-) -- Signature