Author: mav
Date: Sat Jan 10 18:28:58 2015
New Revision: 276913
URL: https://svnweb.freebsd.org/changeset/base/276913
Log:
Use new optimized dmu_read_uio_dbuf() for ZVOLs in device mode.
This slightly reduces overhead by avoiding dnode_hold()/dnode_rele() calls.
MFC after: 2 weeks
Modified:
head/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/zvol.c
Modified: head/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/zvol.c
==============================================================================
--- head/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/zvol.c Sat Jan 10
16:55:28 2015 (r276912)
+++ head/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/zvol.c Sat Jan 10
18:28:58 2015 (r276913)
@@ -1818,7 +1818,7 @@ zvol_read(struct cdev *dev, struct uio *
if (bytes > volsize - uio->uio_loffset)
bytes = volsize - uio->uio_loffset;
- error = dmu_read_uio(zv->zv_objset, ZVOL_OBJ, uio, bytes);
+ error = dmu_read_uio_dbuf(zv->zv_dbuf, uio, bytes);
if (error) {
/* convert checksum errors into IO errors */
if (error == ECKSUM)
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