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powerpc: Don't use a 16G page if beyond mem= limits
authorJon Tollefson <kniht@us.ibm.com>
Tue, 21 Oct 2008 15:27:36 +0000 (15:27 +0000)
committerBenjamin Herrenschmidt <benh@kernel.crashing.org>
Wed, 22 Oct 2008 04:01:21 +0000 (15:01 +1100)
If mem= is used on the boot command line to limit memory then the memory block where a 16G page resides may not be available.

Thanks to Michael Ellerman for finding the problem.

Signed-off-by: Jon Tollefson <kniht@linux.vnet.ibm.com>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>

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