Paolo Bonzini <pbonz...@redhat.com> writes: > Using qemu_memalign only leaves the RAM zero by chance, because libc > will usually use mmap to satisfy our huge requests. But memory will > not be zero when using MALLOC_PERTURB_ with a nonzero value. In the > case of incoming migration, this breaks a recently-introduced > invariant (commit f1c7279, migration: do not sent zero pages in > bulk stage, 2013-03-26). > > To fix this, use mmap ourselves to get a well-aligned, always zero > block for the RAM. Mmap-ed memory is easy to "trim" at the sides. > > This also removes the need to do something special on valgrind > (see commit c2a8238a, Support running QEMU on Valgrind, 2011-10-31), > thus effectively reverts that patch. > > Reviewed-by: Juan Quintela <quint...@redhat.com> > Signed-off-by: Paolo Bonzini <pbonz...@redhat.com>
Reviewed-by: Markus Armbruster <arm...@redhat.com>
