[uml-devel] highmem support in 2.4 (2.4.26-1)

["D. Bahi" <dbahi@enterasys.com>]

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hello UMLers

i uml launch a guest with "mem=1024M" 
and i see "CONFIG_HIGHMEM not enabled".
so i "make ARCH=um xconfig" to enable it
and rebuild.

i no longer see "CONFIG_HIGHMEM not enabled"
but i still see "Memory: 460188k available"
which makes me think i'm missing something.

clues or outright help appreciated?

db

w/o CONFIG_HIGHMEM:

Checking for the skas3 patch in the host...found
Checking for /proc/mm...found
CONFIG_HIGHMEM not enabled - physical memory shrunk to 499122176 bytes
Kernel virtual memory size shrunk to 32505856 bytes
Checking for /dev/anon on the host...Not available (open failed with
errno 2)
Linux version 2.4.26-1um (user@host) (gcc version 3.3.1) #1 Mon Jun 14
16:07:12 EDT 2004
On node 0 totalpages: 121856
zone(0): 121856 pages.
zone(1): 0 pages.
zone(2): 0 pages.
Kernel command line: umid=uml
ubd0=/local/target0/cowthis,/misc/cctools/target0/images/root_fs_mv31
hostfs=/local/target0/s1/hostfs/chassis[box].cm[cm1] mem=1024M
root=/dev/ubd0
Calibrating delay loop... 3355.44 BogoMIPS
Memory: 474328k available

w/ CONFIG_HIGHMEM:

Checking for the skas3 patch in the host...found
Checking for /proc/mm...found
Kernel virtual memory size shrunk to 32505856 bytes
Checking for /dev/anon on the host...Not available (open failed with
errno 2)
Linux version 2.4.226-1um (user@host) (gcc version 3.3.1) #3 Thu Jun 24
18:58:57 EDT 2004
On node 0 totalpages: 262144
zone(0): 121856 pages.
zone(1): 0 pages.
zone(2): 140288 pages.
Kernel command line: umid=uml
ubd0=/local/target0/cowthis,/misc/cctools/target0/images/root_fs_mv31
hostfs=/local/target0/s1/hostfs/chassis[box].cm[cm1] mem=1024M
root=/dev/ubd0
Calibrating delay loop... 3656.90 BogoMIPS
Memory: 460188k available


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