tree 2f8db5fe1a3ed277d719eb8f354cbfb46a4586e2
parent 0cf33fb6b49a19de32859e2cdc6021334f448fb3
author Michael S. Tsirkin <mst@redhat.com> 1441892211 +0300
committer Michael S. Tsirkin <mst@redhat.com> 1443705412 +0300

oslib: rework anonimous RAM allocation

At the moment we first allocate RAM, sometimes more than necessary for
alignment reasons.  We then free the extra RAM.

Rework this to avoid the temporary allocation: reserve the
range by mapping it with PROT_NONE, then use just the
necessary range with MAP_FIXED.

Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Reviewed-by: Paolo Bonzini <pbonzini@redhat.com>
Acked-by: Paolo Bonzini <pbonzini@redhat.com>