tree 0ef1ef9d11ea4fceed77f639ce7e6b5e63e810c9
parent d0db00caa73f8a014e7599fbb46fceb02d86859a
author Barret Rhoden <brho@cs.berkeley.edu> 1501621273 -0400
committer Barret Rhoden <brho@cs.berkeley.edu> 1502744539 -0400

mm: Fix VMR merge issues

First, mprotect wasn't merging at all.  Glibc actually uses this a lot when
we allocate TLSs (grep grow_heap() and ignore that it is static).

Also we were failing to merge some mappings since we were keeping track of
useless flags.  For instance, MAP_POPULATE only matters when we create the
mapping.  We don't need to track that later on.  Flags like that were
preventing mergers.

Signed-off-by: Barret Rhoden <brho@cs.berkeley.edu>