diff --git a/drivers/md/dm-io.c b/drivers/md/dm-io.c
index 76a5af00a26b5b52ce45a72bc0e58d6744d33468..2067288f61f9b5e868da28c6c7c9694b9a5269cf 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;
@@ -40,34 +42,22 @@ 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 5dfbdcb40a47f8feaeee5449214a9a232cc523f3..719693340d1d3808646462a95166bcf3e7574a82 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 a1f321889676d4b51eee4f08ce874e86d6449a57..948e3f4925bfe6d28a39aeed22e11324f1b1b8df 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 976ad4688afc2ee03189e208663429a74f759109..53089aa113877475c250a54cd4cd772c9fa31424 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 95891dfcbca021563a465751dacf064aee3a46df..135c2f1fdbfcc95aefb0d842030e71a089e87d30 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 5c9186b93fff0794488233df3afce65be8471e47..f4b0aa3126f5deae8ff8908375a9da1eca790ecf 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);
/*