svn commit: r288579 - head/sys/cddl/contrib/opensolaris/uts/common/fs/zfs

[Alexander Motin]

Author: mav
Date: Sat Oct  3 11:05:58 2015
New Revision: 288579
URL: https://svnweb.freebsd.org/changeset/base/288579

Log:
  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.
  
  This is temporary local patch, that should be replaced when upstreamed.
  
  Discussed with:	mahrens
  MFC after:	3 days

Modified:
  head/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/dmu.c

Modified: head/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/dmu.c
==============================================================================
--- head/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/dmu.c	Sat Oct  3 09:47:29 2015	(r288578)
+++ head/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/dmu.c	Sat Oct  3 11:05:58 2015	(r288579)
@@ -449,7 +449,7 @@ 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);