[Xen-ia64-devel] [PATCH] make xenLinux/ia64 privcmd mmap not to use dom0 memory.

[Isaku Yamahata <yamahata@xxxxxxxxxxxxx>]

make xenLinux/ia64 privcmd mmap not to use dom0 memory.
xenLinux/ia64 privcmd mmap uses pseudo physical address space.
it used alloc_pages() to allocate the space.
It wastes dom0 memory and sometimes several hundreds megabytes is
allocated depending on domU memory size.
With this patch xenLinux/ia64 tris to find the region which can be
used safely and uses the reasion. 


Alex.
xen_ia64_privcmd_init() tries to guess where pseudo physicall address
region can be used for the priv cmd mmap by heuristics.
Although I tested this patch on tiger2 and tiger4, I'm not sure
about other platforms.
Because your testing box has more complicated memory arrangement,
Could you confirm it?

Thanks.
-- 
yamahata

Attachment: 10049:0502e796a0e8_privcmd_mmap_pseud_physical_addr.patch
Description: Text document

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