Return-Path: Received: from mail-pl1-f196.google.com ([209.85.214.196]:45732 "EHLO mail-pl1-f196.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S2388965AbeKPKcI (ORCPT ); Fri, 16 Nov 2018 05:32:08 -0500 Received: by mail-pl1-f196.google.com with SMTP id a14so5657786plm.12 for ; Thu, 15 Nov 2018 16:22:01 -0800 (PST) Date: Thu, 15 Nov 2018 16:21:57 -0800 From: Omar Sandoval To: Ming Lei Cc: Jens Axboe , linux-block@vger.kernel.org, linux-kernel@vger.kernel.org, linux-mm@kvack.org, Dave Chinner , Kent Overstreet , Mike Snitzer , dm-devel@redhat.com, Alexander Viro , linux-fsdevel@vger.kernel.org, Shaohua Li , linux-raid@vger.kernel.org, linux-erofs@lists.ozlabs.org, David Sterba , linux-btrfs@vger.kernel.org, "Darrick J . Wong" , linux-xfs@vger.kernel.org, Gao Xiang , Christoph Hellwig , Theodore Ts'o , linux-ext4@vger.kernel.org, Coly Li , linux-bcache@vger.kernel.org, Boaz Harrosh , Bob Peterson , cluster-devel@redhat.com Subject: Re: [PATCH V10 07/19] btrfs: use bvec_last_segment to get bio's last page Message-ID: <20181116002157.GB23828@vader> References: <20181115085306.9910-1-ming.lei@redhat.com> <20181115085306.9910-8-ming.lei@redhat.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20181115085306.9910-8-ming.lei@redhat.com> Sender: linux-ext4-owner@vger.kernel.org List-ID: On Thu, Nov 15, 2018 at 04:52:54PM +0800, Ming Lei wrote: > Preparing for supporting multi-page bvec. > > Cc: Dave Chinner > Cc: Kent Overstreet > Cc: Mike Snitzer > Cc: dm-devel@redhat.com > Cc: Alexander Viro > Cc: linux-fsdevel@vger.kernel.org > Cc: Shaohua Li > Cc: linux-raid@vger.kernel.org > Cc: linux-erofs@lists.ozlabs.org > Cc: David Sterba > Cc: linux-btrfs@vger.kernel.org > Cc: Darrick J. Wong > Cc: linux-xfs@vger.kernel.org > Cc: Gao Xiang > Cc: Christoph Hellwig > Cc: Theodore Ts'o > Cc: linux-ext4@vger.kernel.org > Cc: Coly Li > Cc: linux-bcache@vger.kernel.org > Cc: Boaz Harrosh > Cc: Bob Peterson > Cc: cluster-devel@redhat.com Reviewed-by: Omar Sandoval > Signed-off-by: Ming Lei > --- > fs/btrfs/compression.c | 5 ++++- > fs/btrfs/extent_io.c | 5 +++-- > 2 files changed, 7 insertions(+), 3 deletions(-) > > diff --git a/fs/btrfs/compression.c b/fs/btrfs/compression.c > index 2955a4ea2fa8..161e14b8b180 100644 > --- a/fs/btrfs/compression.c > +++ b/fs/btrfs/compression.c > @@ -400,8 +400,11 @@ blk_status_t btrfs_submit_compressed_write(struct inode *inode, u64 start, > static u64 bio_end_offset(struct bio *bio) > { > struct bio_vec *last = bio_last_bvec_all(bio); > + struct bio_vec bv; > > - return page_offset(last->bv_page) + last->bv_len + last->bv_offset; > + bvec_last_segment(last, &bv); > + > + return page_offset(bv.bv_page) + bv.bv_len + bv.bv_offset; > } > > static noinline int add_ra_bio_pages(struct inode *inode, > diff --git a/fs/btrfs/extent_io.c b/fs/btrfs/extent_io.c > index d228f706ff3e..5d5965297e7e 100644 > --- a/fs/btrfs/extent_io.c > +++ b/fs/btrfs/extent_io.c > @@ -2720,11 +2720,12 @@ static int __must_check submit_one_bio(struct bio *bio, int mirror_num, > { > blk_status_t ret = 0; > struct bio_vec *bvec = bio_last_bvec_all(bio); > - struct page *page = bvec->bv_page; > + struct bio_vec bv; > struct extent_io_tree *tree = bio->bi_private; > u64 start; > > - start = page_offset(page) + bvec->bv_offset; > + bvec_last_segment(bvec, &bv); > + start = page_offset(bv.bv_page) + bv.bv_offset; > > bio->bi_private = NULL; > > -- > 2.9.5 >