diff options
Diffstat (limited to 'sys')
| -rw-r--r-- | sys/uvm/uvm.h | 4 | ||||
| -rw-r--r-- | sys/uvm/uvm_extern.h | 3 | ||||
| -rw-r--r-- | sys/uvm/uvm_map.c | 8 |
3 files changed, 11 insertions, 4 deletions
diff --git a/sys/uvm/uvm.h b/sys/uvm/uvm.h index 977d45c3b29..3d04e53b9a4 100644 --- a/sys/uvm/uvm.h +++ b/sys/uvm/uvm.h @@ -1,4 +1,4 @@ -/* $OpenBSD: uvm.h,v 1.23 2008/05/05 15:37:41 thib Exp $ */ +/* $OpenBSD: uvm.h,v 1.24 2008/06/09 20:30:23 miod Exp $ */ /* $NetBSD: uvm.h,v 1.24 2000/11/27 08:40:02 chs Exp $ */ /* @@ -128,11 +128,13 @@ struct uvm { #define UVM_ET_SUBMAP 0x02 /* it is a vm_map submap */ #define UVM_ET_COPYONWRITE 0x04 /* copy_on_write */ #define UVM_ET_NEEDSCOPY 0x08 /* needs_copy */ +#define UVM_ET_HOLE 0x10 /* no backend */ #define UVM_ET_ISOBJ(E) (((E)->etype & UVM_ET_OBJ) != 0) #define UVM_ET_ISSUBMAP(E) (((E)->etype & UVM_ET_SUBMAP) != 0) #define UVM_ET_ISCOPYONWRITE(E) (((E)->etype & UVM_ET_COPYONWRITE) != 0) #define UVM_ET_ISNEEDSCOPY(E) (((E)->etype & UVM_ET_NEEDSCOPY) != 0) +#define UVM_ET_ISHOLE(E) (((E)->etype & UVM_ET_HOLE) != 0) #ifdef _KERNEL diff --git a/sys/uvm/uvm_extern.h b/sys/uvm/uvm_extern.h index 406a2a0391c..f0e48816b5b 100644 --- a/sys/uvm/uvm_extern.h +++ b/sys/uvm/uvm_extern.h @@ -1,4 +1,4 @@ -/* $OpenBSD: uvm_extern.h,v 1.69 2008/04/09 16:58:11 deraadt Exp $ */ +/* $OpenBSD: uvm_extern.h,v 1.70 2008/06/09 20:30:23 miod Exp $ */ /* $NetBSD: uvm_extern.h,v 1.57 2001/03/09 01:02:12 chs Exp $ */ /* @@ -184,6 +184,7 @@ typedef int vm_prot_t; #define UVM_FLAG_COPYONW 0x080000 /* set copy_on_write flag */ #define UVM_FLAG_AMAPPAD 0x100000 /* for bss: pad amap to reduce malloc() */ #define UVM_FLAG_TRYLOCK 0x200000 /* fail if we can not lock map */ +#define UVM_FLAG_HOLE 0x400000 /* no backend */ /* macros to extract info */ #define UVM_PROTECTION(X) ((X) & UVM_PROT_MASK) diff --git a/sys/uvm/uvm_map.c b/sys/uvm/uvm_map.c index bc605570b0d..a13a7ce92a6 100644 --- a/sys/uvm/uvm_map.c +++ b/sys/uvm/uvm_map.c @@ -1,4 +1,4 @@ -/* $OpenBSD: uvm_map.c,v 1.99 2007/09/15 10:10:37 martin Exp $ */ +/* $OpenBSD: uvm_map.c,v 1.100 2008/06/09 20:30:23 miod Exp $ */ /* $NetBSD: uvm_map.c,v 1.86 2000/11/27 08:40:03 chs Exp $ */ /* @@ -897,6 +897,8 @@ step3: if ((flags & UVM_FLAG_OVERLAY) == 0) new_entry->etype |= UVM_ET_NEEDSCOPY; } + if (flags & UVM_FLAG_HOLE) + new_entry->etype |= UVM_ET_HOLE; new_entry->protection = prot; new_entry->max_protection = maxprot; @@ -1451,7 +1453,9 @@ uvm_unmap_remove(struct vm_map *map, vaddr_t start, vaddr_t end, * special case: handle mappings to anonymous kernel objects. * we want to free these pages right away... */ - if (map->flags & VM_MAP_INTRSAFE) { + if (UVM_ET_ISHOLE(entry)) { + /* nothing to do! */ + } else if (map->flags & VM_MAP_INTRSAFE) { uvm_km_pgremove_intrsafe(entry->start, entry->end); pmap_kremove(entry->start, len); } else if (UVM_ET_ISOBJ(entry) && |