[Xen-devel] deleting mtrrs in dom0

[Kurt Garloff <kurt@xxxxxxxxxx>]

Hi,

I seem to be undable to delete MTRRs in domain0:

root@tpkurt:~ [0]# cat /proc/mtrr 
reg00: base=0x00000000 (   0MB), size= 512MB: write-back, count=0
reg01: base=0x1ff80000 ( 511MB), size= 512KB: uncachable, count=0
reg02: base=0xe0000000 (3584MB), size=  32MB: write-combining, count=0
reg03: base=0xd0000000 (3328MB), size= 256MB: write-combining, count=0
root@tpkurt:~ [0]# echo "disable=1" /proc/mtrr 
disable=1 /proc/mtrr
root@tpkurt:~ [0]# echo "disable=1" >/proc/mtrr 
root@tpkurt:~ [1]# cat /proc/mtrr 
reg00: base=0x00000000 (   0MB), size= 512MB: write-back, count=0
reg01: base=0x1ff80000 ( 511MB), size= 512KB: uncachable, count=0
reg02: base=0xe0000000 (3584MB), size=  32MB: write-combining, count=0
reg03: base=0xd0000000 (3328MB), size= 256MB: write-combining, count=0

Isn't this supposed to work?
-- 
Kurt Garloff                   <kurt@xxxxxxxxxx>             [Koeln, DE]
Physics:Plasma modeling <garloff@xxxxxxxxxxxxxxxxxxx> [TU Eindhoven, NL]
Linux: SUSE Labs (Director)    <garloff@xxxxxxx>            [Novell Inc]

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