--- sys/vm/vm_fault.c.orig +++ sys/vm/vm_fault.c @@ -139,6 +139,7 @@ vm_object_t object; vm_pindex_t pindex; vm_page_t m; + bool m_needs_zeroing; /* Top-level map object. */ vm_object_t first_object; @@ -265,6 +266,7 @@ vm_fault_deallocate(struct faultstate *fs) { + fs->m_needs_zeroing = true; vm_fault_page_release(&fs->m_cow); vm_fault_page_release(&fs->m); vm_object_pip_wakeup(fs->object); @@ -1172,7 +1174,7 @@ /* * Zero the page if necessary and mark it valid. */ - if ((fs->m->flags & PG_ZERO) == 0) { + if (fs->m_needs_zeroing) { pmap_zero_page(fs->m); } else { VM_CNT_INC(v_ozfod); @@ -1286,6 +1288,7 @@ vm_waitpfault(dset, vm_pfault_oom_wait * hz); return (FAULT_RESTART); } + fs->m_needs_zeroing = (fs->m->flags & PG_ZERO) == 0; fs->oom_started = false; return (FAULT_CONTINUE); @@ -1553,6 +1556,7 @@ 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; fs.can_read_lock = true; --- sys/vm/vm_object.c.orig +++ sys/vm/vm_object.c @@ -2088,7 +2088,7 @@ (options & (OBJPR_CLEANONLY | OBJPR_NOTMAPPED)) == OBJPR_NOTMAPPED, ("vm_object_page_remove: illegal options for object %p", object)); if (object->resident_page_count == 0) - return; + goto remove_pager; vm_object_pip_add(object, 1); again: p = vm_page_find_least(object, start); @@ -2164,6 +2164,7 @@ } vm_object_pip_wakeup(object); +remove_pager: vm_pager_freespace(object, start, (end == 0 ? object->size : end) - start); }