Subject: memory disk, evbarm - lubbock
To: 'firstname.lastname@example.org' <email@example.com>
From: Stewart Heitmann <S.Heitmann@lake.com>
Date: 04/14/2003 15:42:29
I am trying to create a memory disk within the kernel
for the evbarm port to the LUBBOCK (Intel XScale) eval board.
Ultimately I want to put the root filesystem on the memory disk,
but havent got that far yet because I cant make the memory
disk large enough.
I can compile a kernel with up to 4096K space set aside
for the memory disk, but when I try to make it larger I
get a kernel panic.
Oddly enough, when I make it much much larger (16384K or more)
the kernel boots ok, but /sbin/init seg faults.
Is there a limit on the size of a memory disk?
I'd like to make one about 30MB, is that a silly thing to try???
For the record, my kernel config has:
options MEMORY_DISK_HOOKS #
boottime setup of ramdisk
options MEMORY_DISK_SERVER=0 # no userspace
memory disk support
#options MEMORY_DISK_IS_ROOT # use memory
disk as root (disabled for now)
options MEMORY_DISK_ROOT_SIZE=8192 # (md0=4096K)
# disk/mass storage pseudo-devices
pseudo-device md 1 # memory
disk device (ramdisk)
My config file has other options that no longer seem to have any effect,
and I cant find any reference to them in sys/dev so I believe they are
redundant. Can anyone confirm these are no longer required?
#options MEMORY_DISK_SIZE=3072 # Size in blocks
#options MINIROOTSIZE=1000 # Size in blocks
Anyone got any ideas?
I originally posted to firstname.lastname@example.org but got no response
other than a sympathetic sigh from somebody else having with the same
Stewart Heitmann <email@example.com>