loop: add BLK_DEV_LOOP_MIN_COUNT=%i to allow distros 0 pre-allocated loop devices

[karo-tx-linux.git] / drivers / block / Kconfig

diff --git a/drivers/block/Kconfig b/drivers/block/Kconfig
index 717d6e4e18d3d08086fd2d5365574adbd613aef8..57212c5235e298f661e9fc314da7e9e3c0cf5e39 100644 (file)
--- a/drivers/block/Kconfig
+++ b/drivers/block/Kconfig
@@ -256,6 +256,21 @@ config BLK_DEV_LOOP
 
          Most users will answer N here.
 
+config BLK_DEV_LOOP_MIN_COUNT
+       int "Number of loop devices to pre-create at init time"
+       depends on BLK_DEV_LOOP
+       default 8
+       help
+         Static number of loop devices to be unconditionally pre-created
+         at init time.
+
+         This default value can be overwritten on the kernel command
+         line or with module-parameter loop.max_loop.
+
+         The historic default is 8. If a late 2011 version of losetup(8)
+         is used, it can be set to 0, since needed loop devices can be
+         dynamically allocated with the /dev/loop-control interface.
+
 config BLK_DEV_CRYPTOLOOP
        tristate "Cryptoloop Support"
        select CRYPTO