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);
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