Date: Sat, 10 Jan 2015 18:28:59 +0000 (UTC) From: Alexander Motin <mav@FreeBSD.org> To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-head@freebsd.org Subject: svn commit: r276913 - head/sys/cddl/contrib/opensolaris/uts/common/fs/zfs Message-ID: <201501101828.t0AISx3v084159@svn.freebsd.org>
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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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