tree 17c6f1a6ef637fab13cfccc566dbce28610b8386
parent 52a8319658c8ac3dcce2fed116d20d6014d7b143
author Andrew Jeffery <andrew@aj.id.au> 1522115005 +1030
committer Andrew Jeffery <andrew@aj.id.au> 1522828651 +0930

test: vpnor: Use MAP_SHARED for read-only file memory map

It's not well defined whether a private mapping of a resource that is
MAP_SHARED on a separate file descriptor will see the updates done via
the shared mapping, though under Linux if the private mapping is not
written then we can expect updates from the shared mapping to propagate
(copy-on-write). However, we get a concrete guarantee of the desired
behaviour (observing the effects of the write) if we use MAP_SHARED.

Change-Id: If6a053209a979ee5b96ed09c60fbbd9bdb060a32
Signed-off-by: Andrew Jeffery <andrew@aj.id.au>