svn commit: r273346 - stable/10/sys/cddl/contrib/opensolaris/uts/common/fs/zfs

[Xin LI]

Author: delphij
Date: Mon Oct 20 22:04:49 2014
New Revision: 273346
URL: https://svnweb.freebsd.org/changeset/base/273346

Log:
  MFC r272511: MFV r272499:
  
  Illumos issue:
      5174 add sdt probe for blocked read in dbuf_read()

Modified:
  stable/10/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/dbuf.c
Directory Properties:
  stable/10/   (props changed)

Modified: stable/10/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/dbuf.c
==============================================================================
--- stable/10/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/dbuf.c	Mon Oct 20 21:59:11 2014	(r273345)
+++ stable/10/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/dbuf.c	Mon Oct 20 22:04:49 2014	(r273346)
@@ -671,6 +671,8 @@ dbuf_read(dmu_buf_impl_t *db, zio_t *zio
 			    db->db_state == DB_FILL) {
 				ASSERT(db->db_state == DB_READ ||
 				    (flags & DB_RF_HAVESTRUCT) == 0);
+				DTRACE_PROBE2(blocked__read, dmu_buf_impl_t *,
+				    db, zio_t *, zio);
 				cv_wait(&db->db_changed, &db->db_mtx);
 			}
 			if (db->db_state == DB_UNCACHED)