tree 2e5e623bb15d5f1db3e191236a88221fb83fd693
parent db3d8534903c8a9617142975bec6db95acaba753
author Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com> 1371718814 +0530
committer Benjamin Herrenschmidt <benh@kernel.crashing.org> 1371794513 +1000

powerpc/THP: Double the PMD table size for THP

THP code does PTE page allocation along with large page request and deposit them
for later use. This is to ensure that we won't have any failures when we split
hugepages to regular pages.

On powerpc we want to use the deposited PTE page for storing hash pte slot and
secondary bit information for the HPTEs. We use the second half
of the pmd table to save the deposted PTE page.

Reviewed-by: David Gibson <david@gibson.dropbear.id.au>
Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>