summaryrefslogtreecommitdiff
path: root/drivers/block
diff options
context:
space:
mode:
authorIlya Dryomov <idryomov@gmail.com>2017-11-13 10:35:40 +0100
committerIlya Dryomov <idryomov@gmail.com>2017-11-13 16:33:08 +0100
commit3cfa3b16dd2f1787f9d19d6da2fe9652d806b387 (patch)
tree89bd33f5a4387c38a0944caea0193842e1627fb7 /drivers/block
parentb11270853fa3654f08d4a6a03b23ddb220512d8d (diff)
rbd: default to single-major device number scheme
It's been 3.5 years, let's turn it on by default. Support in rbd(8) utility goes back to pre-firefly, "rbd map" has been loading the module with single_major=Y ever since. However, if the module is already loaded (whether by hand or at boot time), we end up with single_major=N. Also, some people don't install rbd(8) and use the sysfs interface directly. (With single-major=N, a major number is consumed for every mapping, imposing a limit of ~240 rbd images per host. single-major=Y allows mapping thousands of rbd images on a single machine.) Signed-off-by: Ilya Dryomov <idryomov@gmail.com> Reviewed-by: Jason Dillaman <dillaman@redhat.com>
Diffstat (limited to 'drivers/block')
-rw-r--r--drivers/block/rbd.c7
1 files changed, 3 insertions, 4 deletions
diff --git a/drivers/block/rbd.c b/drivers/block/rbd.c
index 8c132a7fbd2c..38fc5f397fde 100644
--- a/drivers/block/rbd.c
+++ b/drivers/block/rbd.c
@@ -449,12 +449,11 @@ static DEFINE_IDA(rbd_dev_id_ida);
static struct workqueue_struct *rbd_wq;
/*
- * Default to false for now, as single-major requires >= 0.75 version of
- * userspace rbd utility.
+ * single-major requires >= 0.75 version of userspace rbd utility.
*/
-static bool single_major = false;
+static bool single_major = true;
module_param(single_major, bool, S_IRUGO);
-MODULE_PARM_DESC(single_major, "Use a single major number for all rbd devices (default: false)");
+MODULE_PARM_DESC(single_major, "Use a single major number for all rbd devices (default: true)");
static int rbd_img_request_submit(struct rbd_img_request *img_request);