From: Heiko Carstens <heiko.carstens@de.ibm.com>
Date: Wed, 17 Oct 2012 10:18:05 +0000 (+0200)
Subject: s390/mm,vmemmap: use 1MB frames for vmemmap
X-Git-Tag: omap-for-v3.8/fixes-for-merge-window-v4-signed~29^2~39
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=f7817968d03df390d77d3af1b13298efa4f31047;p=pandora-kernel.git

s390/mm,vmemmap: use 1MB frames for vmemmap

Use 1MB frames for vmemmap if EDAT1 is available in order to
reduce TLB pressure
Always use a 1MB frame even if its only partially needed for
struct pages. Otherwise we would end up with a mix of large
frame and page mappings, because vmemmap_populate gets called
for each section (256MB -> 3.5MB memmap) separately.
Worst case is that we would waste 512KB.

Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
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