svn commit: r288825 - stable/10/sys/cddl/contrib/opensolaris/uts/common/fs/zfs

[Alexander Motin]

Author: mav
Date: Mon Oct  5 13:33:02 2015
New Revision: 288825
URL: https://svnweb.freebsd.org/changeset/base/288825

Log:
  MFC r288579: Restore original array_rd_sz semantics.
  
  Before r278702 prefetch was blocked for I/Os > 1MB, after -- >= 1MB.
  1MB I/Os are used for bulk operations in CTL (XCOPY, VERIFY), and disabling
  prefetch for them reduced the performance.

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

Modified: stable/10/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/dmu.c
==============================================================================
--- stable/10/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/dmu.c	Mon Oct  5 13:15:21 2015	(r288824)
+++ stable/10/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/dmu.c	Mon Oct  5 13:33:02 2015	(r288825)
@@ -450,7 +450,7 @@ dmu_buf_hold_array_by_dnode(dnode_t *dn,
 	}
 
 	if ((flags & DMU_READ_NO_PREFETCH) == 0 && read &&
-	    length < zfetch_array_rd_sz) {
+	    length <= zfetch_array_rd_sz) {
 		dmu_zfetch(&dn->dn_zfetch, blkid, nblks);
 	}
 	rw_exit(&dn->dn_struct_rwlock);