tree 920158eee8c4a8026f1c9f8e0b9261d828c03833
parent 7678dcfb310a190aea9bee8cdeb1e14987600737
author Christian Borntraeger <borntraeger@de.ibm.com> 1367869476 +0200
committer Martin Schwidefsky <schwidefsky@de.ibm.com> 1367928715 +0200

s390: disable pfmf for clear page instruction

Wit the introduction of large pages Linux also used pfmf for page
clearing. The current implementation is not ideal, though:
- currently we set usage intent=0, but cleared pages are often used
directly after the clearing
- z/VM does not yet provide EDAT
- KVM does have to intercept PFMF even for resident pages

Lets just the mvcl loop in all cases until we have a well defined
pattern were pfmf is besser.

Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>