From: Ming Lei <ming.lei@redhat.com> To: Jens Axboe <axboe@fb.com>, Christoph Hellwig <hch@infradead.org>, Huang Ying <ying.huang@intel.com>, Andrew Morton <akpm@linux-foundation.org>, Alexander Viro <viro@zeniv.linux.org.uk> Cc: linux-kernel@vger.kernel.org, linux-block@vger.kernel.org, linux-fsdevel@vger.kernel.org, linux-mm@kvack.org, Ming Lei <ming.lei@redhat.com> Subject: [PATCH v3 20/49] block: introduce bio_for_each_segment_mp() Date: Tue, 8 Aug 2017 16:45:19 +0800 [thread overview] Message-ID: <20170808084548.18963-21-ming.lei@redhat.com> (raw) In-Reply-To: <20170808084548.18963-1-ming.lei@redhat.com> This helper is used to iterate multipage bvec and it is required in bio_clone(). Signed-off-by: Ming Lei <ming.lei@redhat.com> --- include/linux/bio.h | 34 +++++++++++++++++++++++++++++++--- include/linux/bvec.h | 36 ++++++++++++++++++++++++++++++++---- 2 files changed, 63 insertions(+), 7 deletions(-) diff --git a/include/linux/bio.h b/include/linux/bio.h index 80defb3cfca4..ac8248558ab4 100644 --- a/include/linux/bio.h +++ b/include/linux/bio.h @@ -68,6 +68,9 @@ #define bio_data_dir(bio) \ (op_is_write(bio_op(bio)) ? WRITE : READ) +#define bio_iter_iovec_mp(bio, iter) \ + bvec_iter_bvec_mp((bio)->bi_io_vec, (iter)) + /* * Check whether this bio carries any data or not. A NULL bio is allowed. */ @@ -163,8 +166,8 @@ static inline void *bio_data(struct bio *bio) #define bio_for_each_segment_all(bvl, bio, i) \ for (i = 0, bvl = (bio)->bi_io_vec; i < (bio)->bi_vcnt; i++, bvl++) -static inline void bio_advance_iter(struct bio *bio, struct bvec_iter *iter, - unsigned bytes) +static inline void __bio_advance_iter(struct bio *bio, struct bvec_iter *iter, + unsigned bytes, bool mp) { iter->bi_sector += bytes >> 9; @@ -172,11 +175,26 @@ static inline void bio_advance_iter(struct bio *bio, struct bvec_iter *iter, iter->bi_size -= bytes; iter->bi_done += bytes; } else { - bvec_iter_advance(bio->bi_io_vec, iter, bytes); + if (!mp) + bvec_iter_advance(bio->bi_io_vec, iter, bytes); + else + bvec_iter_advance_mp(bio->bi_io_vec, iter, bytes); /* TODO: It is reasonable to complete bio with error here. */ } } +static inline void bio_advance_iter(struct bio *bio, struct bvec_iter *iter, + unsigned bytes) +{ + __bio_advance_iter(bio, iter, bytes, false); +} + +static inline void bio_advance_iter_mp(struct bio *bio, struct bvec_iter *iter, + unsigned bytes) +{ + __bio_advance_iter(bio, iter, bytes, true); +} + static inline bool bio_rewind_iter(struct bio *bio, struct bvec_iter *iter, unsigned int bytes) { @@ -204,6 +222,16 @@ static inline bool bio_rewind_iter(struct bio *bio, struct bvec_iter *iter, #define bio_for_each_segment(bvl, bio, iter) \ __bio_for_each_segment(bvl, bio, iter, (bio)->bi_iter) +#define __bio_for_each_segment_mp(bvl, bio, iter, start) \ + for (iter = (start); \ + (iter).bi_size && \ + ((bvl = bio_iter_iovec_mp((bio), (iter))), 1); \ + bio_advance_iter_mp((bio), &(iter), (bvl).bv_len)) + +/* returns one real segment(multipage bvec) each time */ +#define bio_for_each_segment_mp(bvl, bio, iter) \ + __bio_for_each_segment_mp(bvl, bio, iter, (bio)->bi_iter) + #define bio_iter_last(bvec, iter) ((iter).bi_size == (bvec).bv_len) static inline unsigned bio_segments(struct bio *bio) diff --git a/include/linux/bvec.h b/include/linux/bvec.h index d5f999a493de..c1ec0945451a 100644 --- a/include/linux/bvec.h +++ b/include/linux/bvec.h @@ -131,8 +131,16 @@ struct bvec_iter { .bv_offset = bvec_iter_offset((bvec), (iter)), \ }) -static inline bool bvec_iter_advance(const struct bio_vec *bv, - struct bvec_iter *iter, unsigned bytes) +#define bvec_iter_bvec_mp(bvec, iter) \ +((struct bio_vec) { \ + .bv_page = bvec_iter_page_mp((bvec), (iter)), \ + .bv_len = bvec_iter_len_mp((bvec), (iter)), \ + .bv_offset = bvec_iter_offset_mp((bvec), (iter)), \ +}) + +static inline bool __bvec_iter_advance(const struct bio_vec *bv, + struct bvec_iter *iter, + unsigned bytes, bool mp) { if (WARN_ONCE(bytes > iter->bi_size, "Attempted to advance past end of bvec iter\n")) { @@ -141,8 +149,14 @@ static inline bool bvec_iter_advance(const struct bio_vec *bv, } while (bytes) { - unsigned iter_len = bvec_iter_len(bv, *iter); - unsigned len = min(bytes, iter_len); + unsigned len; + + if (mp) + len = bvec_iter_len_mp(bv, *iter); + else + len = bvec_iter_len_sp(bv, *iter); + + len = min(bytes, len); bytes -= len; iter->bi_size -= len; @@ -181,6 +195,20 @@ static inline bool bvec_iter_rewind(const struct bio_vec *bv, return true; } +static inline bool bvec_iter_advance(const struct bio_vec *bv, + struct bvec_iter *iter, + unsigned bytes) +{ + return __bvec_iter_advance(bv, iter, bytes, false); +} + +static inline bool bvec_iter_advance_mp(const struct bio_vec *bv, + struct bvec_iter *iter, + unsigned bytes) +{ + return __bvec_iter_advance(bv, iter, bytes, true); +} + #define for_each_bvec(bvl, bio_vec, iter, start) \ for (iter = (start); \ (iter).bi_size && \ -- 2.9.4
WARNING: multiple messages have this Message-ID (diff)
From: Ming Lei <ming.lei@redhat.com> To: Jens Axboe <axboe@fb.com>, Christoph Hellwig <hch@infradead.org>, Huang Ying <ying.huang@intel.com>, Andrew Morton <akpm@linux-foundation.org>, Alexander Viro <viro@zeniv.linux.org.uk> Cc: linux-kernel@vger.kernel.org, linux-block@vger.kernel.org, linux-fsdevel@vger.kernel.org, linux-mm@kvack.org, Ming Lei <ming.lei@redhat.com> Subject: [PATCH v3 20/49] block: introduce bio_for_each_segment_mp() Date: Tue, 8 Aug 2017 16:45:19 +0800 [thread overview] Message-ID: <20170808084548.18963-21-ming.lei@redhat.com> (raw) In-Reply-To: <20170808084548.18963-1-ming.lei@redhat.com> This helper is used to iterate multipage bvec and it is required in bio_clone(). Signed-off-by: Ming Lei <ming.lei@redhat.com> --- include/linux/bio.h | 34 +++++++++++++++++++++++++++++++--- include/linux/bvec.h | 36 ++++++++++++++++++++++++++++++++---- 2 files changed, 63 insertions(+), 7 deletions(-) diff --git a/include/linux/bio.h b/include/linux/bio.h index 80defb3cfca4..ac8248558ab4 100644 --- a/include/linux/bio.h +++ b/include/linux/bio.h @@ -68,6 +68,9 @@ #define bio_data_dir(bio) \ (op_is_write(bio_op(bio)) ? WRITE : READ) +#define bio_iter_iovec_mp(bio, iter) \ + bvec_iter_bvec_mp((bio)->bi_io_vec, (iter)) + /* * Check whether this bio carries any data or not. A NULL bio is allowed. */ @@ -163,8 +166,8 @@ static inline void *bio_data(struct bio *bio) #define bio_for_each_segment_all(bvl, bio, i) \ for (i = 0, bvl = (bio)->bi_io_vec; i < (bio)->bi_vcnt; i++, bvl++) -static inline void bio_advance_iter(struct bio *bio, struct bvec_iter *iter, - unsigned bytes) +static inline void __bio_advance_iter(struct bio *bio, struct bvec_iter *iter, + unsigned bytes, bool mp) { iter->bi_sector += bytes >> 9; @@ -172,11 +175,26 @@ static inline void bio_advance_iter(struct bio *bio, struct bvec_iter *iter, iter->bi_size -= bytes; iter->bi_done += bytes; } else { - bvec_iter_advance(bio->bi_io_vec, iter, bytes); + if (!mp) + bvec_iter_advance(bio->bi_io_vec, iter, bytes); + else + bvec_iter_advance_mp(bio->bi_io_vec, iter, bytes); /* TODO: It is reasonable to complete bio with error here. */ } } +static inline void bio_advance_iter(struct bio *bio, struct bvec_iter *iter, + unsigned bytes) +{ + __bio_advance_iter(bio, iter, bytes, false); +} + +static inline void bio_advance_iter_mp(struct bio *bio, struct bvec_iter *iter, + unsigned bytes) +{ + __bio_advance_iter(bio, iter, bytes, true); +} + static inline bool bio_rewind_iter(struct bio *bio, struct bvec_iter *iter, unsigned int bytes) { @@ -204,6 +222,16 @@ static inline bool bio_rewind_iter(struct bio *bio, struct bvec_iter *iter, #define bio_for_each_segment(bvl, bio, iter) \ __bio_for_each_segment(bvl, bio, iter, (bio)->bi_iter) +#define __bio_for_each_segment_mp(bvl, bio, iter, start) \ + for (iter = (start); \ + (iter).bi_size && \ + ((bvl = bio_iter_iovec_mp((bio), (iter))), 1); \ + bio_advance_iter_mp((bio), &(iter), (bvl).bv_len)) + +/* returns one real segment(multipage bvec) each time */ +#define bio_for_each_segment_mp(bvl, bio, iter) \ + __bio_for_each_segment_mp(bvl, bio, iter, (bio)->bi_iter) + #define bio_iter_last(bvec, iter) ((iter).bi_size == (bvec).bv_len) static inline unsigned bio_segments(struct bio *bio) diff --git a/include/linux/bvec.h b/include/linux/bvec.h index d5f999a493de..c1ec0945451a 100644 --- a/include/linux/bvec.h +++ b/include/linux/bvec.h @@ -131,8 +131,16 @@ struct bvec_iter { .bv_offset = bvec_iter_offset((bvec), (iter)), \ }) -static inline bool bvec_iter_advance(const struct bio_vec *bv, - struct bvec_iter *iter, unsigned bytes) +#define bvec_iter_bvec_mp(bvec, iter) \ +((struct bio_vec) { \ + .bv_page = bvec_iter_page_mp((bvec), (iter)), \ + .bv_len = bvec_iter_len_mp((bvec), (iter)), \ + .bv_offset = bvec_iter_offset_mp((bvec), (iter)), \ +}) + +static inline bool __bvec_iter_advance(const struct bio_vec *bv, + struct bvec_iter *iter, + unsigned bytes, bool mp) { if (WARN_ONCE(bytes > iter->bi_size, "Attempted to advance past end of bvec iter\n")) { @@ -141,8 +149,14 @@ static inline bool bvec_iter_advance(const struct bio_vec *bv, } while (bytes) { - unsigned iter_len = bvec_iter_len(bv, *iter); - unsigned len = min(bytes, iter_len); + unsigned len; + + if (mp) + len = bvec_iter_len_mp(bv, *iter); + else + len = bvec_iter_len_sp(bv, *iter); + + len = min(bytes, len); bytes -= len; iter->bi_size -= len; @@ -181,6 +195,20 @@ static inline bool bvec_iter_rewind(const struct bio_vec *bv, return true; } +static inline bool bvec_iter_advance(const struct bio_vec *bv, + struct bvec_iter *iter, + unsigned bytes) +{ + return __bvec_iter_advance(bv, iter, bytes, false); +} + +static inline bool bvec_iter_advance_mp(const struct bio_vec *bv, + struct bvec_iter *iter, + unsigned bytes) +{ + return __bvec_iter_advance(bv, iter, bytes, true); +} + #define for_each_bvec(bvl, bio_vec, iter, start) \ for (iter = (start); \ (iter).bi_size && \ -- 2.9.4 -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@kvack.org. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: <a href=mailto:"dont@kvack.org"> email@kvack.org </a>
next prev parent reply other threads:[~2017-08-08 8:50 UTC|newest] Thread overview: 160+ messages / expand[flat|nested] mbox.gz Atom feed top 2017-08-08 8:44 [PATCH v3 00/49] block: support multipage bvec Ming Lei 2017-08-08 8:44 ` Ming Lei 2017-08-08 8:45 ` [PATCH v3 01/49] block: drbd: comment on direct access bvec table Ming Lei 2017-08-08 8:45 ` Ming Lei 2017-08-10 11:12 ` Christoph Hellwig 2017-08-10 11:12 ` Christoph Hellwig 2017-08-08 8:45 ` [PATCH v3 02/49] block: loop: comment on direct access to " Ming Lei 2017-08-08 8:45 ` Ming Lei 2017-08-08 8:45 ` [PATCH v3 03/49] kernel/power/swap.c: " Ming Lei 2017-08-08 8:45 ` Ming Lei 2017-08-08 8:45 ` [PATCH v3 04/49] mm: page_io.c: " Ming Lei 2017-08-08 8:45 ` Ming Lei 2017-08-10 11:14 ` Christoph Hellwig 2017-08-10 11:14 ` Christoph Hellwig 2017-08-08 8:45 ` [PATCH v3 05/49] fs/buffer: " Ming Lei 2017-08-08 8:45 ` Ming Lei 2017-08-10 11:16 ` Christoph Hellwig 2017-08-10 11:16 ` Christoph Hellwig 2017-08-08 8:45 ` [PATCH v3 06/49] f2fs: f2fs_read_end_io: " Ming Lei 2017-08-08 8:45 ` Ming Lei 2017-08-08 8:45 ` [PATCH v3 07/49] bcache: " Ming Lei 2017-08-08 8:45 ` Ming Lei 2017-08-08 12:36 ` Coly Li 2017-08-08 12:36 ` Coly Li 2017-08-08 12:36 ` Coly Li 2017-08-10 11:26 ` Christoph Hellwig 2017-08-10 11:26 ` Christoph Hellwig 2017-10-19 22:51 ` Ming Lei 2017-10-19 22:51 ` Ming Lei 2017-08-08 8:45 ` [PATCH v3 08/49] block: comment on bio_alloc_pages() Ming Lei 2017-08-08 8:45 ` Ming Lei 2017-08-08 8:45 ` [PATCH v3 09/49] block: comment on bio_iov_iter_get_pages() Ming Lei 2017-08-08 8:45 ` Ming Lei 2017-08-10 11:28 ` Christoph Hellwig 2017-08-10 11:28 ` Christoph Hellwig 2017-10-19 22:55 ` Ming Lei 2017-10-19 22:55 ` Ming Lei 2017-08-08 8:45 ` [PATCH v3 10/49] dm: limit the max bio size as BIO_MAX_PAGES * PAGE_SIZE Ming Lei 2017-08-08 8:45 ` Ming Lei 2017-08-10 11:29 ` Christoph Hellwig 2017-08-10 11:29 ` Christoph Hellwig 2017-08-08 8:45 ` [PATCH v3 11/49] btrfs: avoid access to .bi_vcnt directly Ming Lei 2017-08-08 8:45 ` Ming Lei 2017-08-10 11:29 ` Christoph Hellwig 2017-08-10 11:29 ` Christoph Hellwig 2017-10-19 22:57 ` Ming Lei 2017-10-19 22:57 ` Ming Lei 2017-08-08 8:45 ` [PATCH v3 12/49] btrfs: avoid to access bvec table directly for a cloned bio Ming Lei 2017-08-08 8:45 ` Ming Lei 2017-08-08 8:45 ` [PATCH v3 13/49] btrfs: comment on direct access bvec table Ming Lei 2017-08-08 8:45 ` Ming Lei 2017-08-08 8:45 ` [PATCH v3 14/49] block: bounce: avoid direct access to " Ming Lei 2017-08-08 8:45 ` Ming Lei 2017-08-08 8:45 ` [PATCH v3 15/49] bvec_iter: introduce BVEC_ITER_ALL_INIT Ming Lei 2017-08-08 8:45 ` Ming Lei 2017-08-08 8:45 ` [PATCH v3 16/49] block: bounce: don't access bio->bi_io_vec in copy_to_high_bio_irq Ming Lei 2017-08-08 8:45 ` Ming Lei 2017-08-08 8:45 ` [PATCH v3 17/49] block: comments on bio_for_each_segment[_all] Ming Lei 2017-08-08 8:45 ` Ming Lei 2017-08-10 11:32 ` Christoph Hellwig 2017-08-10 11:32 ` Christoph Hellwig 2017-08-08 8:45 ` [PATCH v3 18/49] block: introduce multipage/single page bvec helpers Ming Lei 2017-08-08 8:45 ` Ming Lei 2017-08-10 12:00 ` Christoph Hellwig 2017-08-10 12:00 ` Christoph Hellwig 2017-08-08 8:45 ` [PATCH v3 19/49] block: implement sp version of bvec iterator helpers Ming Lei 2017-08-08 8:45 ` Ming Lei 2017-08-10 12:01 ` Christoph Hellwig 2017-08-10 12:01 ` Christoph Hellwig 2017-08-08 8:45 ` Ming Lei [this message] 2017-08-08 8:45 ` [PATCH v3 20/49] block: introduce bio_for_each_segment_mp() Ming Lei 2017-08-10 12:11 ` Christoph Hellwig 2017-08-10 12:11 ` Christoph Hellwig 2017-10-19 23:37 ` Ming Lei 2017-10-19 23:37 ` Ming Lei 2017-08-08 8:45 ` [PATCH v3 21/49] blk-merge: compute bio->bi_seg_front_size efficiently Ming Lei 2017-08-08 8:45 ` Ming Lei 2017-08-10 12:11 ` Christoph Hellwig 2017-08-10 12:11 ` Christoph Hellwig 2017-08-08 8:45 ` [PATCH v3 22/49] block: blk-merge: try to make front segments in full size Ming Lei 2017-08-08 8:45 ` Ming Lei 2017-08-10 12:12 ` Christoph Hellwig 2017-08-10 12:12 ` Christoph Hellwig 2017-08-08 8:45 ` [PATCH v3 23/49] block: blk-merge: remove unnecessary check Ming Lei 2017-08-08 8:45 ` Ming Lei 2017-08-10 12:12 ` Christoph Hellwig 2017-08-10 12:12 ` Christoph Hellwig 2017-08-08 8:45 ` [PATCH v3 24/49] block: use bio_for_each_segment_mp() to compute segments count Ming Lei 2017-08-08 8:45 ` Ming Lei 2017-08-08 8:45 ` [PATCH v3 25/49] block: use bio_for_each_segment_mp() to map sg Ming Lei 2017-08-08 8:45 ` Ming Lei 2017-08-08 8:45 ` [PATCH v3 26/49] block: introduce bvec_for_each_sp_bvec() Ming Lei 2017-08-08 8:45 ` Ming Lei 2017-08-08 8:45 ` [PATCH v3 27/49] block: bio: introduce single/multi page version of bio_for_each_segment_all() Ming Lei 2017-08-08 8:45 ` Ming Lei 2017-08-08 8:45 ` [PATCH v3 28/49] block: introduce bvec_get_last_page() Ming Lei 2017-08-08 8:45 ` Ming Lei 2017-08-08 8:45 ` [PATCH v3 29/49] fs/buffer.c: use bvec iterator to truncate the bio Ming Lei 2017-08-08 8:45 ` Ming Lei 2017-08-08 8:45 ` [PATCH v3 30/49] btrfs: use bvec_get_last_page to get bio's last page Ming Lei 2017-08-08 8:45 ` Ming Lei 2017-08-08 8:45 ` [PATCH v3 31/49] block: deal with dirtying pages for multipage bvec Ming Lei 2017-08-08 8:45 ` Ming Lei 2017-08-08 8:45 ` [PATCH v3 32/49] block: convert to singe/multi page version of bio_for_each_segment_all() Ming Lei 2017-08-08 8:45 ` Ming Lei 2017-08-08 8:45 ` [PATCH v3 33/49] bcache: convert to bio_for_each_segment_all_sp() Ming Lei 2017-08-08 8:45 ` Ming Lei 2017-08-08 12:35 ` Coly Li 2017-08-08 12:35 ` Coly Li 2017-08-08 12:35 ` Coly Li 2017-08-08 8:45 ` [PATCH v3 34/49] md: raid1: " Ming Lei 2017-08-08 8:45 ` Ming Lei 2017-08-08 8:45 ` [PATCH v3 35/49] dm-crypt: don't clear bvec->bv_page in crypt_free_buffer_pages() Ming Lei 2017-08-08 8:45 ` Ming Lei 2017-08-08 8:45 ` [PATCH v3 36/49] dm-crypt: convert to bio_for_each_segment_all_sp() Ming Lei 2017-08-08 8:45 ` Ming Lei 2017-08-08 8:45 ` [PATCH v3 37/49] fs/mpage: " Ming Lei 2017-08-08 8:45 ` Ming Lei 2017-08-10 12:16 ` Christoph Hellwig 2017-08-10 12:16 ` Christoph Hellwig 2017-10-19 23:58 ` Ming Lei 2017-10-19 23:58 ` Ming Lei 2017-08-08 8:45 ` [PATCH v3 38/49] fs/block: " Ming Lei 2017-08-08 8:45 ` Ming Lei 2017-08-08 8:45 ` [PATCH v3 39/49] fs/iomap: " Ming Lei 2017-08-08 8:45 ` Ming Lei 2017-08-08 8:45 ` [PATCH v3 40/49] ext4: " Ming Lei 2017-08-08 8:45 ` Ming Lei 2017-08-08 8:45 ` [PATCH v3 41/49] xfs: " Ming Lei 2017-08-08 8:45 ` Ming Lei 2017-08-08 16:32 ` Darrick J. Wong 2017-08-08 16:32 ` Darrick J. Wong 2017-10-19 23:52 ` Ming Lei 2017-10-19 23:52 ` Ming Lei 2017-08-08 8:45 ` [PATCH v3 42/49] gfs2: " Ming Lei 2017-08-08 8:45 ` [Cluster-devel] " Ming Lei 2017-08-08 8:45 ` Ming Lei 2017-08-08 8:45 ` [PATCH v3 43/49] f2fs: " Ming Lei 2017-08-08 8:45 ` Ming Lei 2017-08-08 8:45 ` [PATCH v3 44/49] exofs: " Ming Lei 2017-08-08 8:45 ` Ming Lei 2017-08-08 8:45 ` [PATCH v3 45/49] fs: crypto: " Ming Lei 2017-08-08 8:45 ` Ming Lei 2017-08-08 8:45 ` [PATCH v3 46/49] fs/btrfs: " Ming Lei 2017-08-08 8:45 ` Ming Lei 2017-08-08 9:00 ` Filipe Manana 2017-08-08 9:00 ` Filipe Manana 2017-08-08 9:00 ` Filipe Manana 2017-08-11 16:54 ` kbuild test robot 2017-08-11 16:54 ` kbuild test robot 2017-08-08 8:45 ` [PATCH v3 47/49] fs/direct-io: " Ming Lei 2017-08-08 8:45 ` Ming Lei 2017-08-08 8:45 ` [PATCH v3 48/49] block: enable multipage bvecs Ming Lei 2017-08-08 8:45 ` Ming Lei 2017-08-18 1:24 ` [lkp-robot] [block] 434f2ea20d: fileio.requests_per_sec -3.1% regression kernel test robot 2017-08-18 1:24 ` kernel test robot 2017-08-18 1:24 ` kernel test robot 2017-08-18 1:24 ` kernel test robot 2017-08-08 8:45 ` [PATCH v3 49/49] block: bio: pass segments to bio if bio_add_page() is bypassed Ming Lei 2017-08-08 8:45 ` Ming Lei
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