--- sys/vm/vm_fault.c.orig +++ sys/vm/vm_fault.c @@ -242,8 +242,6 @@ static void fault_deallocate(struct faultstate *fs) { - - fs->m_needs_zeroing = true; fault_page_release(&fs->m_cow); fault_page_release(&fs->m); vm_object_pip_wakeup(fs->object); @@ -1202,7 +1200,8 @@ vm_waitpfault(dset, vm_pfault_oom_wait * hz); return (FAULT_RESTART); } - fs->m_needs_zeroing = (fs->m->flags & PG_ZERO) == 0; + if (fs->object == fs->first_object) + fs->m_needs_zeroing = (fs->m->flags & PG_ZERO) == 0; fs->oom_started = false; return (FAULT_CONTINUE); @@ -1462,7 +1461,6 @@ fs.fault_flags = fault_flags; fs.map = map; fs.lookup_still_valid = false; - fs.m_needs_zeroing = true; fs.oom_started = false; fs.nera = -1; faultcount = 0; @@ -1470,6 +1468,7 @@ RetryFault: fs.fault_type = fault_type; + fs.m_needs_zeroing = true; /* * Find the backing store object and offset into it to begin the