ramdisk is now allocated "all" of system memory

1 files changed, 8 insertions, 4 deletions

diff --git a/old-school/menu-select b/old-school/menu-select
index d8c9d6e..ed23280 100755
--- a/old-school/menu-select
+++ b/old-school/menu-select
@@ -63,10 +63,14 @@ hwclock_to_system()
 case "$1" in
   boot-ram)
     read _ memtotal_kb _ < /proc/meminfo
-    memtotal_mb=$((memtotal_kb / 1024))
-    ramdisk_mb=$((memtotal_mb / 2))
-    [ "$ramdisk_mb" -ge 256 ] || ramdisk_mb=256
-    modprobe brd rd_size=$((ramdisk_mb * 1024))
+    # This doesn't make sense to me, but setting rd_size _lower_ than total
+    # memory seems to be what breaks things ('btrfs device add' hangs forever).
+    # Somehow you can fill up the filesystem and there's still space for
+    # programs and btrfs does not complain. I don't know what is going on here.
+
+    # BTW, I verified with blockdev that the device size really is being
+    # specified in KB here. I did not really believe it.
+    modprobe brd rd_nr=1 rd_size=$memtotal_kb
 
     init_gpg || error
     init_samizdat /dev/ram0 '' || {