Differential D22822 Diff 65908 head/sys/vm/device_pager.c

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head/sys/vm/device_pager.c

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cdev_pager_free_page(vm_object_t object, vm_page_t m)		cdev_pager_free_page(vm_object_t object, vm_page_t m)
{		{

VM_OBJECT_ASSERT_WLOCKED(object);		VM_OBJECT_ASSERT_WLOCKED(object);
if (object->type == OBJT_MGTDEVICE) {		if (object->type == OBJT_MGTDEVICE) {
KASSERT((m->oflags & VPO_UNMANAGED) == 0, ("unmanaged %p", m));		KASSERT((m->oflags & VPO_UNMANAGED) == 0, ("unmanaged %p", m));
pmap_remove_all(m);		pmap_remove_all(m);
(void)vm_page_remove(m);		(void)vm_page_remove(m);
vm_page_xunbusy(m);
} else if (object->type == OBJT_DEVICE)		} else if (object->type == OBJT_DEVICE)
dev_pager_free_page(object, m);		dev_pager_free_page(object, m);
}		}

static void		static void
dev_pager_free_page(vm_object_t object, vm_page_t m)		dev_pager_free_page(vm_object_t object, vm_page_t m)
{		{

Show All 18 Lines	dev_pager_dealloc(vm_object_t object)
mtx_unlock(&dev_pager_mtx);		mtx_unlock(&dev_pager_mtx);
VM_OBJECT_WLOCK(object);		VM_OBJECT_WLOCK(object);

if (object->type == OBJT_DEVICE) {		if (object->type == OBJT_DEVICE) {
/*		/*
* Free up our fake pages.		* Free up our fake pages.
*/		*/
while ((m = TAILQ_FIRST(&object->un_pager.devp.devp_pglist))		while ((m = TAILQ_FIRST(&object->un_pager.devp.devp_pglist))
!= NULL)		!= NULL) {
		if (vm_page_busy_acquire(m, VM_ALLOC_WAITFAIL) == 0)
		continue;

dev_pager_free_page(object, m);		dev_pager_free_page(object, m);
}		}
		}
object->handle = NULL;		object->handle = NULL;
object->type = OBJT_DEAD;		object->type = OBJT_DEAD;
}		}

static int		static int
dev_pager_getpages(vm_object_t object, vm_page_t ma, int count, int rbehind,		dev_pager_getpages(vm_object_t object, vm_page_t ma, int count, int rbehind,
int *rahead)		int *rahead)
{		{
▲ Show 20 Lines • Show All 101 Lines • ▼ Show 20 Lines	if (((*mres)->flags & PG_FICTITIOUS) != 0) {
vm_page_updatefake(page, paddr, memattr);		vm_page_updatefake(page, paddr, memattr);
} else {		} else {
/*		/*
* Replace the passed in reqpage page with our own fake page and		* Replace the passed in reqpage page with our own fake page and
* free up the all of the original pages.		* free up the all of the original pages.
*/		*/
page = vm_page_getfake(paddr, memattr);		page = vm_page_getfake(paddr, memattr);
VM_OBJECT_WLOCK(object);		VM_OBJECT_WLOCK(object);
vm_page_replace_checked(page, object, (mres)->pindex, mres);		vm_page_replace(page, object, (mres)->pindex, mres);
vm_page_free(*mres);
*mres = page;		*mres = page;
}		}
vm_page_valid(page);		vm_page_valid(page);
return (VM_PAGER_OK);		return (VM_PAGER_OK);
}		}

static void		static void
dev_pager_putpages(vm_object_t object, vm_page_t *m, int count, int flags,		dev_pager_putpages(vm_object_t object, vm_page_t *m, int count, int flags,
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