Hirokazu,

The length field in the call to get_user_pages() from touch_unmapped_pages()
is incorrectly specified in bytes, not pages.

As a result of this, if you use the migration code to migrate a page, then
subsequent pages (that are not necessarily currently allocated or mapped)
can be allocated and mapped as a result of the migration call.

[touch_unmapped_pages() is added by the memory migration code from the memory
hotplug patch so this is not currently part of the mainline kernel]

See attached patch for the fix.
-- 
Best Regards,
Ray
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                   Ray Bryant
512-453-9679 (work)         512-507-7807 (cell)
raybry@sgi.com             raybry@austin.rr.com
The box said: "Requires Windows 98 or better",
            so I installed Linux.
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