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Code Issues Releases Activity

- Define VM_OBJECT_LOCK_INIT().

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- Avoid repeatedly mtx_init()ing and mtx_destroy()ing the vm_object's lock
   using UMA's uminit callback, in this case, vm_object_zinit().
This commit is contained in:
Alan Cox 2003-04-28 03:45:35 +00:00
parent 70b400a813
commit ed6a786313
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=114145
2 changed files with 6 additions and 5 deletions
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9
sys/vm/vm_object.c
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@ -181,6 +181,7 @@ vm_object_zinit(void *mem, int size)
object = (vm_object_t)mem;
bzero(&object->mtx, sizeof(object->mtx));
VM_OBJECT_LOCK_INIT(object);
/* These are true for any object that has been freed */
object->paging_in_progress = 0;
@ -193,8 +194,6 @@ _vm_object_allocate(objtype_t type, vm_pindex_t size, vm_object_t object)
{
int incr;
mtx_init(&object->mtx, "vm object", NULL, MTX_DEF | MTX_DUPOK);
TAILQ_INIT(&object->memq);
TAILQ_INIT(&object->shadow_head);
@ -236,12 +235,15 @@ vm_object_init(void)
mtx_init(&vm_object_list_mtx, "vm object_list", NULL, MTX_DEF);
kernel_object = &kernel_object_store;
VM_OBJECT_LOCK_INIT(&kernel_object_store);
_vm_object_allocate(OBJT_DEFAULT, OFF_TO_IDX(VM_MAX_KERNEL_ADDRESS - VM_MIN_KERNEL_ADDRESS),
kernel_object);
kmem_object = &kmem_object_store;
VM_OBJECT_LOCK_INIT(&kmem_object_store);
_vm_object_allocate(OBJT_DEFAULT, OFF_TO_IDX(VM_MAX_KERNEL_ADDRESS - VM_MIN_KERNEL_ADDRESS),
kmem_object);
obj_zone = uma_zcreate("VM OBJECT", sizeof (struct vm_object), NULL,
#ifdef INVARIANTS
vm_object_zdtor,
@ -612,7 +614,6 @@ vm_object_terminate(vm_object_t object)
TAILQ_REMOVE(&vm_object_list, object, object_list);
mtx_unlock(&vm_object_list_mtx);
mtx_destroy(&object->mtx);
wakeup(object);
/*
@ -1611,8 +1612,6 @@ vm_object_collapse(vm_object_t object)
);
mtx_unlock(&vm_object_list_mtx);
mtx_destroy(&backing_object->mtx);
uma_zfree(obj_zone, backing_object);
object_collapses++;

2
sys/vm/vm_object.h
View File

@ -173,6 +173,8 @@ extern vm_object_t kmem_object;
#define VM_OBJECT_LOCK(object) mtx_lock(&(object)->mtx)
#define VM_OBJECT_LOCK_ASSERT(object, type) \
mtx_assert(&(object)->mtx, (type))
#define VM_OBJECT_LOCK_INIT(object) mtx_init(&(object)->mtx, "vm object", \
NULL, MTX_DEF | MTX_DUPOK)
#define VM_OBJECT_LOCKED(object) mtx_owned(&(object)->mtx)
#define VM_OBJECT_MTX(object) (&(object)->mtx)
#define VM_OBJECT_UNLOCK(object) mtx_unlock(&(object)->mtx)