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block: remove the per-bio/request write hint

Browse Source 
With the NVMe support for this gone, there are no consumers of these hints
left, so remove them.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Link: https://lore.kernel.org/r/20220304175556.407719-2-hch@lst.de
Signed-off-by: Jens Axboe <axboe@kernel.dk>
This commit is contained in:
Christoph Hellwig 2022-03-04 18:55:56 +01:00 committed by Jens Axboe
parent 85e6c77576
commit c75e707fe1
22 changed files with 9 additions and 107 deletions
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2
block/bio.c
View File

@ -257,7 +257,6 @@ void bio_init(struct bio *bio, struct block_device *bdev, struct bio_vec *table,
bio->bi_opf = opf;
bio->bi_flags = 0;
bio->bi_ioprio = 0;
bio->bi_write_hint = 0;
bio->bi_status = 0;
bio->bi_iter.bi_sector = 0;
bio->bi_iter.bi_size = 0;
@ -737,7 +736,6 @@ static int __bio_clone(struct bio *bio, struct bio *bio_src, gfp_t gfp)
bio_flagged(bio_src, BIO_REMAPPED))
bio_set_flag(bio, BIO_REMAPPED);
bio->bi_ioprio = bio_src->bi_ioprio;
bio->bi_write_hint = bio_src->bi_write_hint;
bio->bi_iter = bio_src->bi_iter;
bio_clone_blkg_association(bio, bio_src);

1
block/blk-crypto-fallback.c
View File

@ -170,7 +170,6 @@ static struct bio *blk_crypto_fallback_clone_bio(struct bio *bio_src)
bio_set_flag(bio, BIO_REMAPPED);
bio->bi_opf = bio_src->bi_opf;
bio->bi_ioprio = bio_src->bi_ioprio;
bio->bi_write_hint = bio_src->bi_write_hint;
bio->bi_iter.bi_sector = bio_src->bi_iter.bi_sector;
bio->bi_iter.bi_size = bio_src->bi_iter.bi_size;

14
block/blk-merge.c
View File

@ -782,13 +782,6 @@ static struct request *attempt_merge(struct request_queue *q,
!blk_write_same_mergeable(req->bio, next->bio))
return NULL;
/*
* Don't allow merge of different write hints, or for a hint with
* non-hint IO.
*/
if (req->write_hint != next->write_hint)
return NULL;
if (req->ioprio != next->ioprio)
return NULL;
@ -915,13 +908,6 @@ bool blk_rq_merge_ok(struct request *rq, struct bio *bio)
!blk_write_same_mergeable(rq->bio, bio))
return false;
/*
* Don't allow merge of different write hints, or for a hint with
* non-hint IO.
*/
if (rq->write_hint != bio->bi_write_hint)
return false;
if (rq->ioprio != bio_prio(bio))
return false;

24
block/blk-mq-debugfs.c
View File

@ -183,35 +183,11 @@ static ssize_t queue_state_write(void *data, const char __user *buf,
return count;
}
static int queue_write_hint_show(void *data, struct seq_file *m)
{
struct request_queue *q = data;
int i;
for (i = 0; i < BLK_MAX_WRITE_HINTS; i++)
seq_printf(m, "hint%d: %llu\n", i, q->write_hints[i]);
return 0;
}
static ssize_t queue_write_hint_store(void *data, const char __user *buf,
size_t count, loff_t *ppos)
{
struct request_queue *q = data;
int i;
for (i = 0; i < BLK_MAX_WRITE_HINTS; i++)
q->write_hints[i] = 0;
return count;
}
static const struct blk_mq_debugfs_attr blk_mq_debugfs_queue_attrs[] = {
{ "poll_stat", 0400, queue_poll_stat_show },
{ "requeue_list", 0400, .seq_ops = &queue_requeue_list_seq_ops },
{ "pm_only", 0600, queue_pm_only_show, NULL },
{ "state", 0600, queue_state_show, queue_state_write },
{ "write_hints", 0600, queue_write_hint_show, queue_write_hint_store },
{ "zone_wlock", 0400, queue_zone_wlock_show, NULL },
{ },
};

1
block/blk-mq.c
View File

@ -2406,7 +2406,6 @@ static void blk_mq_bio_to_request(struct request *rq, struct bio *bio,
rq->cmd_flags |= REQ_FAILFAST_MASK;
rq->__sector = bio->bi_iter.bi_sector;
rq->write_hint = bio->bi_write_hint;
blk_rq_bio_prep(rq, bio, nr_segs);
/* This can't fail, since GFP_NOIO includes __GFP_DIRECT_RECLAIM. */

1
block/bounce.c
View File

@ -169,7 +169,6 @@ static struct bio *bounce_clone_bio(struct bio *bio_src)
if (bio_flagged(bio_src, BIO_REMAPPED))
bio_set_flag(bio, BIO_REMAPPED);
bio->bi_ioprio = bio_src->bi_ioprio;
bio->bi_write_hint = bio_src->bi_write_hint;
bio->bi_iter.bi_sector = bio_src->bi_iter.bi_sector;
bio->bi_iter.bi_size = bio_src->bi_iter.bi_size;

3
block/fops.c
View File

@ -83,7 +83,6 @@ static ssize_t __blkdev_direct_IO_simple(struct kiocb *iocb,
bio_init(&bio, bdev, vecs, nr_pages, dio_bio_write_op(iocb));
}
bio.bi_iter.bi_sector = pos >> SECTOR_SHIFT;
bio.bi_write_hint = iocb->ki_hint;
bio.bi_private = current;
bio.bi_end_io = blkdev_bio_end_io_simple;
bio.bi_ioprio = iocb->ki_ioprio;
@ -225,7 +224,6 @@ static ssize_t __blkdev_direct_IO(struct kiocb *iocb, struct iov_iter *iter,
for (;;) {
bio->bi_iter.bi_sector = pos >> SECTOR_SHIFT;
bio->bi_write_hint = iocb->ki_hint;
bio->bi_private = dio;
bio->bi_end_io = blkdev_bio_end_io;
bio->bi_ioprio = iocb->ki_ioprio;
@ -327,7 +325,6 @@ static ssize_t __blkdev_direct_IO_async(struct kiocb *iocb,
dio->flags = 0;
dio->iocb = iocb;
bio->bi_iter.bi_sector = pos >> SECTOR_SHIFT;
bio->bi_write_hint = iocb->ki_hint;
bio->bi_end_io = blkdev_bio_end_io_async;
bio->bi_ioprio = iocb->ki_ioprio;

2
drivers/md/raid1.c
View File

@ -1137,8 +1137,6 @@ static void alloc_behind_master_bio(struct r1bio *r1_bio,
goto skip_copy;
}
behind_bio->bi_write_hint = bio->bi_write_hint;
while (i < vcnt && size) {
struct page *page;
int len = min_t(int, PAGE_SIZE, size);

28
drivers/md/raid5-ppl.c
View File

@ -467,7 +467,6 @@ static void ppl_submit_iounit(struct ppl_io_unit *io)
bio_set_dev(bio, log->rdev->bdev);
bio->bi_iter.bi_sector = log->next_io_sector;
bio_add_page(bio, io->header_page, PAGE_SIZE, 0);
bio->bi_write_hint = ppl_conf->write_hint;
pr_debug("%s: log->current_io_sector: %llu\n", __func__,
(unsigned long long)log->next_io_sector);
@ -497,7 +496,6 @@ static void ppl_submit_iounit(struct ppl_io_unit *io)
bio = bio_alloc_bioset(prev->bi_bdev, BIO_MAX_VECS,
prev->bi_opf, GFP_NOIO,
&ppl_conf->bs);
bio->bi_write_hint = prev->bi_write_hint;
bio->bi_iter.bi_sector = bio_end_sector(prev);
bio_add_page(bio, sh->ppl_page, PAGE_SIZE, 0);
@ -1397,7 +1395,6 @@ int ppl_init_log(struct r5conf *conf)
atomic64_set(&ppl_conf->seq, 0);
INIT_LIST_HEAD(&ppl_conf->no_mem_stripes);
spin_lock_init(&ppl_conf->no_mem_stripes_lock);
ppl_conf->write_hint = RWH_WRITE_LIFE_NOT_SET;
if (!mddev->external) {
ppl_conf->signature = ~crc32c_le(~0, mddev->uuid, sizeof(mddev->uuid));
@ -1496,25 +1493,13 @@ int ppl_modify_log(struct r5conf *conf, struct md_rdev *rdev, bool add)
static ssize_t
ppl_write_hint_show(struct mddev *mddev, char *buf)
{
size_t ret = 0;
struct r5conf *conf;
struct ppl_conf *ppl_conf = NULL;
spin_lock(&mddev->lock);
conf = mddev->private;
if (conf && raid5_has_ppl(conf))
ppl_conf = conf->log_private;
ret = sprintf(buf, "%d\n", ppl_conf ? ppl_conf->write_hint : 0);
spin_unlock(&mddev->lock);
return ret;
return sprintf(buf, "%d\n", 0);
}
static ssize_t
ppl_write_hint_store(struct mddev *mddev, const char *page, size_t len)
{
struct r5conf *conf;
struct ppl_conf *ppl_conf;
int err = 0;
unsigned short new;
@ -1528,17 +1513,10 @@ ppl_write_hint_store(struct mddev *mddev, const char *page, size_t len)
return err;
conf = mddev->private;
if (!conf) {
if (!conf)
err = -ENODEV;
} else if (raid5_has_ppl(conf)) {
ppl_conf = conf->log_private;
if (!ppl_conf)
err = -EINVAL;
else
ppl_conf->write_hint = new;
} else {
else if (!raid5_has_ppl(conf) || !conf->log_private)
err = -EINVAL;
}
mddev_unlock(mddev);

6
drivers/md/raid5.c
View File

@ -1210,9 +1210,6 @@ static void ops_run_io(struct stripe_head *sh, struct stripe_head_state *s)
bi->bi_io_vec[0].bv_len = RAID5_STRIPE_SIZE(conf);
bi->bi_io_vec[0].bv_offset = sh->dev[i].offset;
bi->bi_iter.bi_size = RAID5_STRIPE_SIZE(conf);
bi->bi_write_hint = sh->dev[i].write_hint;
if (!rrdev)
sh->dev[i].write_hint = RWH_WRITE_LIFE_NOT_SET;
/*
* If this is discard request, set bi_vcnt 0. We don't
* want to confuse SCSI because SCSI will replace payload
@ -1264,8 +1261,6 @@ static void ops_run_io(struct stripe_head *sh, struct stripe_head_state *s)
rbi->bi_io_vec[0].bv_len = RAID5_STRIPE_SIZE(conf);
rbi->bi_io_vec[0].bv_offset = sh->dev[i].offset;
rbi->bi_iter.bi_size = RAID5_STRIPE_SIZE(conf);
rbi->bi_write_hint = sh->dev[i].write_hint;
sh->dev[i].write_hint = RWH_WRITE_LIFE_NOT_SET;
/*
* If this is discard request, set bi_vcnt 0. We don't
* want to confuse SCSI because SCSI will replace payload
@ -3416,7 +3411,6 @@ static int add_stripe_bio(struct stripe_head *sh, struct bio *bi, int dd_idx,
(unsigned long long)sh->sector);
spin_lock_irq(&sh->stripe_lock);
sh->dev[dd_idx].write_hint = bi->bi_write_hint;
/* Don't allow new IO added to stripes in batch list */
if (sh->batch_head)
goto overlap;

1
fs/btrfs/extent_io.c
View File

@ -3321,7 +3321,6 @@ static int alloc_new_bio(struct btrfs_inode *inode,
bio_ctrl->bio_flags = bio_flags;
bio->bi_end_io = end_io_func;
bio->bi_private = &inode->io_tree;
bio->bi_write_hint = inode->vfs_inode.i_write_hint;
bio->bi_opf = opf;
ret = calc_bio_boundaries(bio_ctrl, inode, file_offset);
if (ret < 0)

13
fs/buffer.c
View File

@ -53,7 +53,7 @@
static int fsync_buffers_list(spinlock_t *lock, struct list_head *list);
static int submit_bh_wbc(int op, int op_flags, struct buffer_head *bh,
enum rw_hint hint, struct writeback_control *wbc);
struct writeback_control *wbc);
#define BH_ENTRY(list) list_entry((list), struct buffer_head, b_assoc_buffers)
@ -1806,8 +1806,7 @@ int __block_write_full_page(struct inode *inode, struct page *page,
do {
struct buffer_head *next = bh->b_this_page;
if (buffer_async_write(bh)) {
submit_bh_wbc(REQ_OP_WRITE, write_flags, bh,
inode->i_write_hint, wbc);
submit_bh_wbc(REQ_OP_WRITE, write_flags, bh, wbc);
nr_underway++;
}
bh = next;
@ -1861,8 +1860,7 @@ int __block_write_full_page(struct inode *inode, struct page *page,
struct buffer_head *next = bh->b_this_page;
if (buffer_async_write(bh)) {
clear_buffer_dirty(bh);
submit_bh_wbc(REQ_OP_WRITE, write_flags, bh,
inode->i_write_hint, wbc);
submit_bh_wbc(REQ_OP_WRITE, write_flags, bh, wbc);
nr_underway++;
}
bh = next;
@ -3008,7 +3006,7 @@ static void end_bio_bh_io_sync(struct bio *bio)
}
static int submit_bh_wbc(int op, int op_flags, struct buffer_head *bh,
enum rw_hint write_hint, struct writeback_control *wbc)
struct writeback_control *wbc)
{
struct bio *bio;
@ -3034,7 +3032,6 @@ static int submit_bh_wbc(int op, int op_flags, struct buffer_head *bh,
fscrypt_set_bio_crypt_ctx_bh(bio, bh, GFP_NOIO);
bio->bi_iter.bi_sector = bh->b_blocknr * (bh->b_size >> 9);
bio->bi_write_hint = write_hint;
bio_add_page(bio, bh->b_page, bh->b_size, bh_offset(bh));
BUG_ON(bio->bi_iter.bi_size != bh->b_size);
@ -3056,7 +3053,7 @@ static int submit_bh_wbc(int op, int op_flags, struct buffer_head *bh,
int submit_bh(int op, int op_flags, struct buffer_head *bh)
{
return submit_bh_wbc(op, op_flags, bh, 0, NULL);
return submit_bh_wbc(op, op_flags, bh, NULL);
}
EXPORT_SYMBOL(submit_bh);

3
fs/direct-io.c
View File

@ -402,9 +402,6 @@ dio_bio_alloc(struct dio *dio, struct dio_submit *sdio,
bio->bi_end_io = dio_bio_end_aio;
else
bio->bi_end_io = dio_bio_end_io;
bio->bi_write_hint = dio->iocb->ki_hint;
sdio->bio = bio;
sdio->logical_offset_in_bio = sdio->cur_page_fs_offset;
}

5
fs/ext4/page-io.c
View File

@ -373,7 +373,6 @@ void ext4_io_submit(struct ext4_io_submit *io)
if (bio) {
if (io->io_wbc->sync_mode == WB_SYNC_ALL)
io->io_bio->bi_opf |= REQ_SYNC;
io->io_bio->bi_write_hint = io->io_end->inode->i_write_hint;
submit_bio(io->io_bio);
}
io->io_bio = NULL;
@ -418,10 +417,8 @@ static void io_submit_add_bh(struct ext4_io_submit *io,
submit_and_retry:
ext4_io_submit(io);
}
if (io->io_bio == NULL) {
if (io->io_bio == NULL)
io_submit_init_bio(io, bh);
io->io_bio->bi_write_hint = inode->i_write_hint;
}
ret = bio_add_page(io->io_bio, page, bh->b_size, bh_offset(bh));
if (ret != bh->b_size)
goto submit_and_retry;

2
fs/f2fs/data.c
View File

@ -403,8 +403,6 @@ static struct bio *__bio_alloc(struct f2fs_io_info *fio, int npages)
} else {
bio->bi_end_io = f2fs_write_end_io;
bio->bi_private = sbi;
bio->bi_write_hint = f2fs_io_type_to_rw_hint(sbi,
fio->type, fio->temp);
}
iostat_alloc_and_bind_ctx(sbi, bio, NULL);

1
fs/gfs2/lops.c
View File

@ -491,7 +491,6 @@ static struct bio *gfs2_chain_bio(struct bio *prev, unsigned int nr_iovecs)
new = bio_alloc(prev->bi_bdev, nr_iovecs, prev->bi_opf, GFP_NOIO);
bio_clone_blkg_association(new, prev);
new->bi_iter.bi_sector = bio_end_sector(prev);
new->bi_write_hint = prev->bi_write_hint;
bio_chain(new, prev);
submit_bio(prev);
return new;

2
fs/iomap/buffered-io.c
View File

@ -1232,7 +1232,6 @@ iomap_alloc_ioend(struct inode *inode, struct iomap_writepage_ctx *wpc,
REQ_OP_WRITE | wbc_to_write_flags(wbc),
GFP_NOFS, &iomap_ioend_bioset);
bio->bi_iter.bi_sector = sector;
bio->bi_write_hint = inode->i_write_hint;
wbc_init_bio(wbc, bio);
ioend = container_of(bio, struct iomap_ioend, io_inline_bio);
@ -1263,7 +1262,6 @@ iomap_chain_bio(struct bio *prev)
new = bio_alloc(prev->bi_bdev, BIO_MAX_VECS, prev->bi_opf, GFP_NOFS);
bio_clone_blkg_association(new, prev);
new->bi_iter.bi_sector = bio_end_sector(prev);
new->bi_write_hint = prev->bi_write_hint;
bio_chain(prev, new);
bio_get(prev); /* for iomap_finish_ioend */

1
fs/iomap/direct-io.c
View File

@ -309,7 +309,6 @@ static loff_t iomap_dio_bio_iter(const struct iomap_iter *iter,
bio = bio_alloc(iomap->bdev, nr_pages, bio_opf, GFP_KERNEL);
bio->bi_iter.bi_sector = iomap_sector(iomap, pos);
bio->bi_write_hint = dio->iocb->ki_hint;
bio->bi_ioprio = dio->iocb->ki_ioprio;
bio->bi_private = dio;
bio->bi_end_io = iomap_dio_bio_end_io;

1
fs/mpage.c
View File

@ -588,7 +588,6 @@ static int __mpage_writepage(struct page *page, struct writeback_control *wbc,
GFP_NOFS);
bio->bi_iter.bi_sector = blocks[0] << (blkbits - 9);
wbc_init_bio(wbc, bio);
bio->bi_write_hint = inode->i_write_hint;
}
/*

1
fs/zonefs/super.c
View File

@ -695,7 +695,6 @@ static ssize_t zonefs_file_dio_append(struct kiocb *iocb, struct iov_iter *from)
bio = bio_alloc(bdev, nr_pages,
REQ_OP_ZONE_APPEND | REQ_SYNC | REQ_IDLE, GFP_NOFS);
bio->bi_iter.bi_sector = zi->i_zsector;
bio->bi_write_hint = iocb->ki_hint;
bio->bi_ioprio = iocb->ki_ioprio;
if (iocb->ki_flags & IOCB_DSYNC)
bio->bi_opf |= REQ_FUA;

1
include/linux/blk_types.h
View File

@ -250,7 +250,6 @@ struct bio {
*/
unsigned short bi_flags; /* BIO_* below */
unsigned short bi_ioprio;
unsigned short bi_write_hint;
blk_status_t bi_status;
atomic_t __bi_remaining;

3
include/linux/blkdev.h
View File

@ -518,9 +518,6 @@ struct request_queue {
bool mq_sysfs_init_done;
#define BLK_MAX_WRITE_HINTS 5
u64 write_hints[BLK_MAX_WRITE_HINTS];
/*
* Independent sector access ranges. This is always NULL for
* devices that do not have multiple independent access ranges.