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Message-ID: <52b76a42-2107-36bf-a9e3-7b13b935f4e6@suse.de>
Date: Mon, 21 May 2018 11:58:56 +0800
From: Coly Li <colyli@...e.de>
To: Kent Overstreet <kent.overstreet@...il.com>,
linux-kernel@...r.kernel.org, linux-block@...r.kernel.org,
axboe@...nel.dk, hch@...radead.org, snitzer@...hat.com,
darrick.wong@...cle.com, clm@...com, bacik@...com,
linux-xfs@...r.kernel.org, drbd-dev@...ts.linbit.com,
linux-btrfs@...r.kernel.org, linux-raid@...r.kernel.org,
neilb@...e.com
Subject: Re: [PATCH 05/12] bcache: convert to bioset_init()/mempool_init()
On 2018/5/21 6:25 AM, Kent Overstreet wrote:
> Signed-off-by: Kent Overstreet <kent.overstreet@...il.com>
Hi Kent,
This change looks good to me,
Reviewed-by: Coly Li <colyli@...e.de>
Thanks.
Coly Li
> ---
> drivers/md/bcache/bcache.h | 10 +++++-----
> drivers/md/bcache/bset.c | 13 ++++---------
> drivers/md/bcache/bset.h | 2 +-
> drivers/md/bcache/btree.c | 4 ++--
> drivers/md/bcache/io.c | 4 ++--
> drivers/md/bcache/request.c | 18 +++++++++---------
> drivers/md/bcache/super.c | 38 ++++++++++++++-----------------------
> 7 files changed, 37 insertions(+), 52 deletions(-)
>
> diff --git a/drivers/md/bcache/bcache.h b/drivers/md/bcache/bcache.h
> index 3a0cfb237a..3050438761 100644
> --- a/drivers/md/bcache/bcache.h
> +++ b/drivers/md/bcache/bcache.h
> @@ -269,7 +269,7 @@ struct bcache_device {
> atomic_t *stripe_sectors_dirty;
> unsigned long *full_dirty_stripes;
>
> - struct bio_set *bio_split;
> + struct bio_set bio_split;
>
> unsigned data_csum:1;
>
> @@ -528,9 +528,9 @@ struct cache_set {
> struct closure sb_write;
> struct semaphore sb_write_mutex;
>
> - mempool_t *search;
> - mempool_t *bio_meta;
> - struct bio_set *bio_split;
> + mempool_t search;
> + mempool_t bio_meta;
> + struct bio_set bio_split;
>
> /* For the btree cache */
> struct shrinker shrink;
> @@ -655,7 +655,7 @@ struct cache_set {
> * A btree node on disk could have too many bsets for an iterator to fit
> * on the stack - have to dynamically allocate them
> */
> - mempool_t *fill_iter;
> + mempool_t fill_iter;
>
> struct bset_sort_state sort;
>
> diff --git a/drivers/md/bcache/bset.c b/drivers/md/bcache/bset.c
> index 579c696a5f..f3403b45bc 100644
> --- a/drivers/md/bcache/bset.c
> +++ b/drivers/md/bcache/bset.c
> @@ -1118,8 +1118,7 @@ struct bkey *bch_btree_iter_next_filter(struct btree_iter *iter,
>
> void bch_bset_sort_state_free(struct bset_sort_state *state)
> {
> - if (state->pool)
> - mempool_destroy(state->pool);
> + mempool_exit(&state->pool);
> }
>
> int bch_bset_sort_state_init(struct bset_sort_state *state, unsigned page_order)
> @@ -1129,11 +1128,7 @@ int bch_bset_sort_state_init(struct bset_sort_state *state, unsigned page_order)
> state->page_order = page_order;
> state->crit_factor = int_sqrt(1 << page_order);
>
> - state->pool = mempool_create_page_pool(1, page_order);
> - if (!state->pool)
> - return -ENOMEM;
> -
> - return 0;
> + return mempool_init_page_pool(&state->pool, 1, page_order);
> }
> EXPORT_SYMBOL(bch_bset_sort_state_init);
>
> @@ -1191,7 +1186,7 @@ static void __btree_sort(struct btree_keys *b, struct btree_iter *iter,
>
> BUG_ON(order > state->page_order);
>
> - outp = mempool_alloc(state->pool, GFP_NOIO);
> + outp = mempool_alloc(&state->pool, GFP_NOIO);
> out = page_address(outp);
> used_mempool = true;
> order = state->page_order;
> @@ -1220,7 +1215,7 @@ static void __btree_sort(struct btree_keys *b, struct btree_iter *iter,
> }
>
> if (used_mempool)
> - mempool_free(virt_to_page(out), state->pool);
> + mempool_free(virt_to_page(out), &state->pool);
> else
> free_pages((unsigned long) out, order);
>
> diff --git a/drivers/md/bcache/bset.h b/drivers/md/bcache/bset.h
> index 0c24280f3b..b867f22004 100644
> --- a/drivers/md/bcache/bset.h
> +++ b/drivers/md/bcache/bset.h
> @@ -347,7 +347,7 @@ static inline struct bkey *bch_bset_search(struct btree_keys *b,
> /* Sorting */
>
> struct bset_sort_state {
> - mempool_t *pool;
> + mempool_t pool;
>
> unsigned page_order;
> unsigned crit_factor;
> diff --git a/drivers/md/bcache/btree.c b/drivers/md/bcache/btree.c
> index 17936b2dc7..2a0968c04e 100644
> --- a/drivers/md/bcache/btree.c
> +++ b/drivers/md/bcache/btree.c
> @@ -204,7 +204,7 @@ void bch_btree_node_read_done(struct btree *b)
> struct bset *i = btree_bset_first(b);
> struct btree_iter *iter;
>
> - iter = mempool_alloc(b->c->fill_iter, GFP_NOIO);
> + iter = mempool_alloc(&b->c->fill_iter, GFP_NOIO);
> iter->size = b->c->sb.bucket_size / b->c->sb.block_size;
> iter->used = 0;
>
> @@ -271,7 +271,7 @@ void bch_btree_node_read_done(struct btree *b)
> bch_bset_init_next(&b->keys, write_block(b),
> bset_magic(&b->c->sb));
> out:
> - mempool_free(iter, b->c->fill_iter);
> + mempool_free(iter, &b->c->fill_iter);
> return;
> err:
> set_btree_node_io_error(b);
> diff --git a/drivers/md/bcache/io.c b/drivers/md/bcache/io.c
> index 2ddf8515e6..9612873afe 100644
> --- a/drivers/md/bcache/io.c
> +++ b/drivers/md/bcache/io.c
> @@ -17,12 +17,12 @@
> void bch_bbio_free(struct bio *bio, struct cache_set *c)
> {
> struct bbio *b = container_of(bio, struct bbio, bio);
> - mempool_free(b, c->bio_meta);
> + mempool_free(b, &c->bio_meta);
> }
>
> struct bio *bch_bbio_alloc(struct cache_set *c)
> {
> - struct bbio *b = mempool_alloc(c->bio_meta, GFP_NOIO);
> + struct bbio *b = mempool_alloc(&c->bio_meta, GFP_NOIO);
> struct bio *bio = &b->bio;
>
> bio_init(bio, bio->bi_inline_vecs, bucket_pages(c));
> diff --git a/drivers/md/bcache/request.c b/drivers/md/bcache/request.c
> index 8e3e8655ed..ae67f5fa80 100644
> --- a/drivers/md/bcache/request.c
> +++ b/drivers/md/bcache/request.c
> @@ -213,7 +213,7 @@ static void bch_data_insert_start(struct closure *cl)
> do {
> unsigned i;
> struct bkey *k;
> - struct bio_set *split = op->c->bio_split;
> + struct bio_set *split = &op->c->bio_split;
>
> /* 1 for the device pointer and 1 for the chksum */
> if (bch_keylist_realloc(&op->insert_keys,
> @@ -548,7 +548,7 @@ static int cache_lookup_fn(struct btree_op *op, struct btree *b, struct bkey *k)
>
> n = bio_next_split(bio, min_t(uint64_t, INT_MAX,
> KEY_OFFSET(k) - bio->bi_iter.bi_sector),
> - GFP_NOIO, s->d->bio_split);
> + GFP_NOIO, &s->d->bio_split);
>
> bio_key = &container_of(n, struct bbio, bio)->key;
> bch_bkey_copy_single_ptr(bio_key, k, ptr);
> @@ -707,7 +707,7 @@ static void search_free(struct closure *cl)
>
> bio_complete(s);
> closure_debug_destroy(cl);
> - mempool_free(s, s->d->c->search);
> + mempool_free(s, &s->d->c->search);
> }
>
> static inline struct search *search_alloc(struct bio *bio,
> @@ -715,7 +715,7 @@ static inline struct search *search_alloc(struct bio *bio,
> {
> struct search *s;
>
> - s = mempool_alloc(d->c->search, GFP_NOIO);
> + s = mempool_alloc(&d->c->search, GFP_NOIO);
>
> closure_init(&s->cl, NULL);
> do_bio_hook(s, bio, request_endio);
> @@ -864,7 +864,7 @@ static int cached_dev_cache_miss(struct btree *b, struct search *s,
> s->cache_missed = 1;
>
> if (s->cache_miss || s->iop.bypass) {
> - miss = bio_next_split(bio, sectors, GFP_NOIO, s->d->bio_split);
> + miss = bio_next_split(bio, sectors, GFP_NOIO, &s->d->bio_split);
> ret = miss == bio ? MAP_DONE : MAP_CONTINUE;
> goto out_submit;
> }
> @@ -887,14 +887,14 @@ static int cached_dev_cache_miss(struct btree *b, struct search *s,
>
> s->iop.replace = true;
>
> - miss = bio_next_split(bio, sectors, GFP_NOIO, s->d->bio_split);
> + miss = bio_next_split(bio, sectors, GFP_NOIO, &s->d->bio_split);
>
> /* btree_search_recurse()'s btree iterator is no good anymore */
> ret = miss == bio ? MAP_DONE : -EINTR;
>
> cache_bio = bio_alloc_bioset(GFP_NOWAIT,
> DIV_ROUND_UP(s->insert_bio_sectors, PAGE_SECTORS),
> - dc->disk.bio_split);
> + &dc->disk.bio_split);
> if (!cache_bio)
> goto out_submit;
>
> @@ -1008,7 +1008,7 @@ static void cached_dev_write(struct cached_dev *dc, struct search *s)
> struct bio *flush;
>
> flush = bio_alloc_bioset(GFP_NOIO, 0,
> - dc->disk.bio_split);
> + &dc->disk.bio_split);
> if (!flush) {
> s->iop.status = BLK_STS_RESOURCE;
> goto insert_data;
> @@ -1021,7 +1021,7 @@ static void cached_dev_write(struct cached_dev *dc, struct search *s)
> closure_bio_submit(s->iop.c, flush, cl);
> }
> } else {
> - s->iop.bio = bio_clone_fast(bio, GFP_NOIO, dc->disk.bio_split);
> + s->iop.bio = bio_clone_fast(bio, GFP_NOIO, &dc->disk.bio_split);
> /* I/O request sent to backing device */
> bio->bi_end_io = backing_request_endio;
> closure_bio_submit(s->iop.c, bio, cl);
> diff --git a/drivers/md/bcache/super.c b/drivers/md/bcache/super.c
> index 3dea06b41d..862b575827 100644
> --- a/drivers/md/bcache/super.c
> +++ b/drivers/md/bcache/super.c
> @@ -766,8 +766,7 @@ static void bcache_device_free(struct bcache_device *d)
> put_disk(d->disk);
> }
>
> - if (d->bio_split)
> - bioset_free(d->bio_split);
> + bioset_exit(&d->bio_split);
> kvfree(d->full_dirty_stripes);
> kvfree(d->stripe_sectors_dirty);
>
> @@ -809,9 +808,8 @@ static int bcache_device_init(struct bcache_device *d, unsigned block_size,
> if (idx < 0)
> return idx;
>
> - if (!(d->bio_split = bioset_create(4, offsetof(struct bbio, bio),
> - BIOSET_NEED_BVECS |
> - BIOSET_NEED_RESCUER)) ||
> + if (bioset_init(&d->bio_split, 4, offsetof(struct bbio, bio),
> + BIOSET_NEED_BVECS|BIOSET_NEED_RESCUER) ||
> !(d->disk = alloc_disk(BCACHE_MINORS))) {
> ida_simple_remove(&bcache_device_idx, idx);
> return -ENOMEM;
> @@ -1465,14 +1463,10 @@ static void cache_set_free(struct closure *cl)
>
> if (c->moving_gc_wq)
> destroy_workqueue(c->moving_gc_wq);
> - if (c->bio_split)
> - bioset_free(c->bio_split);
> - if (c->fill_iter)
> - mempool_destroy(c->fill_iter);
> - if (c->bio_meta)
> - mempool_destroy(c->bio_meta);
> - if (c->search)
> - mempool_destroy(c->search);
> + bioset_exit(&c->bio_split);
> + mempool_exit(&c->fill_iter);
> + mempool_exit(&c->bio_meta);
> + mempool_exit(&c->search);
> kfree(c->devices);
>
> mutex_lock(&bch_register_lock);
> @@ -1683,21 +1677,17 @@ struct cache_set *bch_cache_set_alloc(struct cache_sb *sb)
> INIT_LIST_HEAD(&c->btree_cache_freed);
> INIT_LIST_HEAD(&c->data_buckets);
>
> - c->search = mempool_create_slab_pool(32, bch_search_cache);
> - if (!c->search)
> - goto err;
> -
> iter_size = (sb->bucket_size / sb->block_size + 1) *
> sizeof(struct btree_iter_set);
>
> if (!(c->devices = kzalloc(c->nr_uuids * sizeof(void *), GFP_KERNEL)) ||
> - !(c->bio_meta = mempool_create_kmalloc_pool(2,
> - sizeof(struct bbio) + sizeof(struct bio_vec) *
> - bucket_pages(c))) ||
> - !(c->fill_iter = mempool_create_kmalloc_pool(1, iter_size)) ||
> - !(c->bio_split = bioset_create(4, offsetof(struct bbio, bio),
> - BIOSET_NEED_BVECS |
> - BIOSET_NEED_RESCUER)) ||
> + mempool_init_slab_pool(&c->search, 32, bch_search_cache) ||
> + mempool_init_kmalloc_pool(&c->bio_meta, 2,
> + sizeof(struct bbio) + sizeof(struct bio_vec) *
> + bucket_pages(c)) ||
> + mempool_init_kmalloc_pool(&c->fill_iter, 1, iter_size) ||
> + bioset_init(&c->bio_split, 4, offsetof(struct bbio, bio),
> + BIOSET_NEED_BVECS|BIOSET_NEED_RESCUER) ||
> !(c->uuids = alloc_bucket_pages(GFP_KERNEL, c)) ||
> !(c->moving_gc_wq = alloc_workqueue("bcache_gc",
> WQ_MEM_RECLAIM, 0)) ||
>
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