diff options
Diffstat (limited to 'sys/vm/vm_fault.c')
| -rw-r--r-- | sys/vm/vm_fault.c | 7 |
1 files changed, 5 insertions, 2 deletions
diff --git a/sys/vm/vm_fault.c b/sys/vm/vm_fault.c index cc138c3..fcb2426 100644 --- a/sys/vm/vm_fault.c +++ b/sys/vm/vm_fault.c @@ -196,7 +196,7 @@ vm_fault(vm_map_t map, vm_offset_t vaddr, vm_prot_t fault_type, int fault_flags) { vm_prot_t prot; - int result; + int is_first_object_locked, result; boolean_t growstack, wired; int map_generation; vm_object_t next_object; @@ -683,6 +683,7 @@ readrest: * dirty in the first object so that it will go out * to swap when needed. */ + is_first_object_locked = FALSE; if ( /* * Only one shadow object @@ -701,6 +702,7 @@ readrest: */ ((fs.object->type == OBJT_DEFAULT) || (fs.object->type == OBJT_SWAP)) && + (is_first_object_locked = VM_OBJECT_TRYLOCK(fs.first_object)) && /* * We don't chase down the shadow chain */ @@ -730,7 +732,8 @@ readrest: */ vm_page_copy(fs.m, fs.first_m); } - + if (is_first_object_locked) +/*XXX*/ VM_OBJECT_UNLOCK(fs.first_object); if (fs.m) { /* * We no longer need the old page or object. |
