diff options
| -rw-r--r-- | drivers/md/dm-io.c | 27 | ||||
| -rw-r--r-- | drivers/md/dm-kcopyd.c | 2 | ||||
| -rw-r--r-- | drivers/md/dm-log.c | 3 | ||||
| -rw-r--r-- | drivers/md/dm-raid1.c | 3 | ||||
| -rw-r--r-- | drivers/md/dm-snap-persistent.c | 13 | ||||
| -rw-r--r-- | include/linux/dm-io.h | 3 |
6 files changed, 10 insertions, 41 deletions
diff --git a/drivers/md/dm-io.c b/drivers/md/dm-io.c index 76a5af0..2067288 100644 --- a/drivers/md/dm-io.c +++ b/drivers/md/dm-io.c @@ -19,6 +19,8 @@ #define DM_MSG_PREFIX "io" #define DM_IO_MAX_REGIONS BITS_PER_LONG +#define MIN_IOS 16 +#define MIN_BIOS 16 struct dm_io_client { mempool_t *pool; @@ -41,33 +43,21 @@ struct io { static struct kmem_cache *_dm_io_cache; /* - * io contexts are only dynamically allocated for asynchronous - * io. Since async io is likely to be the majority of io we'll - * have the same number of io contexts as bios! (FIXME: must reduce this). - */ - -static unsigned int pages_to_ios(unsigned int pages) -{ - return 4 * pages; /* too many ? */ -} - -/* * Create a client with mempool and bioset. */ -struct dm_io_client *dm_io_client_create(unsigned num_pages) +struct dm_io_client *dm_io_client_create(void) { - unsigned ios = pages_to_ios(num_pages); struct dm_io_client *client; client = kmalloc(sizeof(*client), GFP_KERNEL); if (!client) return ERR_PTR(-ENOMEM); - client->pool = mempool_create_slab_pool(ios, _dm_io_cache); + client->pool = mempool_create_slab_pool(MIN_IOS, _dm_io_cache); if (!client->pool) goto bad; - client->bios = bioset_create(16, 0); + client->bios = bioset_create(MIN_BIOS, 0); if (!client->bios) goto bad; @@ -81,13 +71,6 @@ struct dm_io_client *dm_io_client_create(unsigned num_pages) } EXPORT_SYMBOL(dm_io_client_create); -int dm_io_client_resize(unsigned num_pages, struct dm_io_client *client) -{ - return mempool_resize(client->pool, pages_to_ios(num_pages), - GFP_KERNEL); -} -EXPORT_SYMBOL(dm_io_client_resize); - void dm_io_client_destroy(struct dm_io_client *client) { mempool_destroy(client->pool); diff --git a/drivers/md/dm-kcopyd.c b/drivers/md/dm-kcopyd.c index 5dfbdcb..7196933 100644 --- a/drivers/md/dm-kcopyd.c +++ b/drivers/md/dm-kcopyd.c @@ -667,7 +667,7 @@ int dm_kcopyd_client_create(unsigned min_pages, if (r) goto bad_client_pages; - kc->io_client = dm_io_client_create(min_pages); + kc->io_client = dm_io_client_create(); if (IS_ERR(kc->io_client)) { r = PTR_ERR(kc->io_client); goto bad_io_client; diff --git a/drivers/md/dm-log.c b/drivers/md/dm-log.c index a1f3218..948e3f4 100644 --- a/drivers/md/dm-log.c +++ b/drivers/md/dm-log.c @@ -449,8 +449,7 @@ static int create_log_context(struct dm_dirty_log *log, struct dm_target *ti, lc->io_req.mem.type = DM_IO_VMA; lc->io_req.notify.fn = NULL; - lc->io_req.client = dm_io_client_create(dm_div_up(buf_size, - PAGE_SIZE)); + lc->io_req.client = dm_io_client_create(); if (IS_ERR(lc->io_req.client)) { r = PTR_ERR(lc->io_req.client); DMWARN("couldn't allocate disk io client"); diff --git a/drivers/md/dm-raid1.c b/drivers/md/dm-raid1.c index 976ad46..53089aa 100644 --- a/drivers/md/dm-raid1.c +++ b/drivers/md/dm-raid1.c @@ -22,7 +22,6 @@ #define DM_MSG_PREFIX "raid1" #define MAX_RECOVERY 1 /* Maximum number of regions recovered in parallel. */ -#define DM_IO_PAGES 64 #define DM_KCOPYD_PAGES 64 #define DM_RAID1_HANDLE_ERRORS 0x01 @@ -887,7 +886,7 @@ static struct mirror_set *alloc_context(unsigned int nr_mirrors, return NULL; } - ms->io_client = dm_io_client_create(DM_IO_PAGES); + ms->io_client = dm_io_client_create(); if (IS_ERR(ms->io_client)) { ti->error = "Error creating dm_io client"; mempool_destroy(ms->read_record_pool); diff --git a/drivers/md/dm-snap-persistent.c b/drivers/md/dm-snap-persistent.c index 95891df..135c2f1 100644 --- a/drivers/md/dm-snap-persistent.c +++ b/drivers/md/dm-snap-persistent.c @@ -154,11 +154,6 @@ struct pstore { struct workqueue_struct *metadata_wq; }; -static unsigned sectors_to_pages(unsigned sectors) -{ - return DIV_ROUND_UP(sectors, PAGE_SIZE >> 9); -} - static int alloc_area(struct pstore *ps) { int r = -ENOMEM; @@ -318,8 +313,7 @@ static int read_header(struct pstore *ps, int *new_snapshot) chunk_size_supplied = 0; } - ps->io_client = dm_io_client_create(sectors_to_pages(ps->store-> - chunk_size)); + ps->io_client = dm_io_client_create(); if (IS_ERR(ps->io_client)) return PTR_ERR(ps->io_client); @@ -368,11 +362,6 @@ static int read_header(struct pstore *ps, int *new_snapshot) return r; } - r = dm_io_client_resize(sectors_to_pages(ps->store->chunk_size), - ps->io_client); - if (r) - return r; - r = alloc_area(ps); return r; diff --git a/include/linux/dm-io.h b/include/linux/dm-io.h index 5c9186b..f4b0aa3 100644 --- a/include/linux/dm-io.h +++ b/include/linux/dm-io.h @@ -69,8 +69,7 @@ struct dm_io_request { * * Create/destroy may block. */ -struct dm_io_client *dm_io_client_create(unsigned num_pages); -int dm_io_client_resize(unsigned num_pages, struct dm_io_client *client); +struct dm_io_client *dm_io_client_create(void); void dm_io_client_destroy(struct dm_io_client *client); /* |