Differential D21311 Diff 61017 head/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/zfs_vnops.c

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head/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/zfs_vnops.c

Show First 20 Lines • Show All 445 Lines • ▼ Show 20 Lines	page_busy(vnode_t *vp, int64_t start, int64_t off, int64_t nbytes)
return (pp);		return (pp);
}		}

static void		static void
page_unbusy(vm_page_t pp)		page_unbusy(vm_page_t pp)
{		{

vm_page_sunbusy(pp);		vm_page_sunbusy(pp);
vm_object_pip_subtract(pp->object, 1);		vm_object_pip_wakeup(pp->object);
}		}

static vm_page_t		static vm_page_t
page_wire(vnode_t *vp, int64_t start)		page_wire(vnode_t *vp, int64_t start)
{		{
vm_object_t obj;		vm_object_t obj;
vm_page_t pp;		vm_page_t pp;

▲ Show 20 Lines • Show All 55 Lines • ▼ Show 20 Lines	update_pages(vnode_t vp, int64_t start, int len, objset_t os, uint64_t oid,

ASSERT(segflg != UIO_NOCOPY);		ASSERT(segflg != UIO_NOCOPY);
ASSERT(vp->v_mount != NULL);		ASSERT(vp->v_mount != NULL);
obj = vp->v_object;		obj = vp->v_object;
ASSERT(obj != NULL);		ASSERT(obj != NULL);

off = start & PAGEOFFSET;		off = start & PAGEOFFSET;
zfs_vmobject_wlock(obj);		zfs_vmobject_wlock(obj);
		vm_object_pip_add(obj, 1);
for (start &= PAGEMASK; len > 0; start += PAGESIZE) {		for (start &= PAGEMASK; len > 0; start += PAGESIZE) {
vm_page_t pp;		vm_page_t pp;
int nbytes = imin(PAGESIZE - off, len);		int nbytes = imin(PAGESIZE - off, len);

if ((pp = page_busy(vp, start, off, nbytes)) != NULL) {		if ((pp = page_busy(vp, start, off, nbytes)) != NULL) {
zfs_vmobject_wunlock(obj);		zfs_vmobject_wunlock(obj);

va = zfs_map_page(pp, &sf);		va = zfs_map_page(pp, &sf);
(void) dmu_read(os, oid, start+off, nbytes,		(void) dmu_read(os, oid, start+off, nbytes,
va+off, DMU_READ_PREFETCH);;		va+off, DMU_READ_PREFETCH);;
zfs_unmap_page(sf);		zfs_unmap_page(sf);

zfs_vmobject_wlock(obj);		zfs_vmobject_wlock(obj);
page_unbusy(pp);		page_unbusy(pp);
}		}
len -= nbytes;		len -= nbytes;
off = 0;		off = 0;
}		}
vm_object_pip_wakeupn(obj, 0);		vm_object_pip_wakeup(obj);
zfs_vmobject_wunlock(obj);		zfs_vmobject_wunlock(obj);
}		}

/*		/*
* Read with UIO_NOCOPY flag means that sendfile(2) requests		* Read with UIO_NOCOPY flag means that sendfile(2) requests
* ZFS to populate a range of page cache pages with data.		* ZFS to populate a range of page cache pages with data.
*		*
* NOTE: this function could be optimized to pre-allocate		* NOTE: this function could be optimized to pre-allocate
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