diff options
Diffstat (limited to 'drivers/md/dm-io.c')
| -rw-r--r-- | drivers/md/dm-io.c | 27 |
1 files changed, 5 insertions, 22 deletions
diff --git a/drivers/md/dm-io.c b/drivers/md/dm-io.c index 76a5af00a26b..2067288f61f9 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); |