Added line to probe brd kernel module.

Signed-off-by: Alessandro Elias <ae11@c3sl.ufpr.br>

1 files changed, 15 insertions, 3 deletions

diff --git a/builder/hd-boot/hooks/prepare-root-part.sh b/builder/hd-boot/hooks/prepare-root-part.sh
index 7963ffb3..d95b5846 100755
--- a/builder/hd-boot/hooks/prepare-root-part.sh
+++ b/builder/hd-boot/hooks/prepare-root-part.sh
@@ -15,9 +15,6 @@
 . "/usr/lib/rebash/core.sh"
 . "/usr/lib/hd-boot/common-lib.sh"
 core.import utils
-core.import logging
-logging.set_commands_log_level debug
-logging.set_log_level debug
 
 LOOP_BACK=127.0.0.1
 BLOCK_DM="root"
@@ -185,6 +182,21 @@ read_only_device=$(utils.find_block_device "$SLX_SYSTEM_PARTITION_IDENTIFIER" "$
 [ -z "$read_only_device" ] && \
     emergency_shell -n "error" "device=\"$read_only_device\", read only block dev could not be found."
 
+# writeable device
+ramdisk_size="$SLX_RAMDISK_SIZE"
+if [ "$ramdisk_size" = "" ]; then
+    ramdisk_size="$(cat /proc/meminfo | awk '/MemTotal/ {print $2}')"
+fi
+# NOTE: If the kernel modul "brd" is compiled into current kernel we can't
+# configure ram disk size dynamically. In this case it have to be
+# configured via kernel command line: "brd.rd_size=SITE_IN_KILOBYTE"
+# statically:
+#! rmmod brd 2>/dev/null
+! modprobe brd rd_nr=1 max_part=1 rd_size="$ramdisk_size" && \
+    emergency_shell -n "error" "Kernel module brd could not be loaded, " \
+    "parameters: rd_nr=1 max_part=1 rd_size=$ramdisk_size"
+
+
 blk_dev_size=$(blockdev --getsz "$read_only_device")
 # make union of block device, building a layer of cow.
 if ! dmsetup create "$BLOCK_DM" --noudevsync --table \