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authorIngo Molnar <mingo@elte.hu>2008-12-16 19:23:36 +0100
committerIngo Molnar <mingo@elte.hu>2008-12-16 19:31:52 +0100
commitb6fd6f26733e864fba2ea3eb1d716e23d2e66f3a (patch)
tree6b76b47a3366d502cbb8a740c15e9d2f46aea645 /lib
parentcfc319833b5b359bf3bce99564dbac00af7925ac (diff)
x86, mm: limit MAXMEM on 64-bit
on 64-bit x86 the physical memory limit is controlled by the sparsemem bits - which are 44 bits right now. But MAXMEM (the max pfn number e820 parsing will allow to enter our sizing routines) is set to 0x00003fffffffffff, i.e. 46 bits - that's too large because it overlaps into the vmalloc range. So couple MAXMEM to MAX_PHYSMEM_BITS, and add a comment that the maximum of MAX_PHYSMEM_BITS is 45 bits. Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'lib')
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