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| author | mav <mav@FreeBSD.org> | 2015-10-03 08:03:36 +0000 |
|---|---|---|
| committer | mav <mav@FreeBSD.org> | 2015-10-03 08:03:36 +0000 |
| commit | b50fb3b80398131dea6df0915424a6f81292afb4 (patch) | |
| tree | 4db32b46e47d3c4e0243a2986a151c66d7f4a454 /sys/cddl/contrib/opensolaris/uts/common/fs/zfs/space_map.c | |
| parent | d80d916b9a160f1eb050815c6d913c56d6155a75 (diff) | |
| download | FreeBSD-src-b50fb3b80398131dea6df0915424a6f81292afb4.zip FreeBSD-src-b50fb3b80398131dea6df0915424a6f81292afb4.tar.gz | |
MFC r286705: 5960 zfs recv should prefetch indirect blocks
5925 zfs receive -o origin=
Reviewed by: Prakash Surya <prakash.surya@delphix.com>
Reviewed by: Matthew Ahrens <mahrens@delphix.com>
Author: Paul Dagnelie <pcd@delphix.com>
While running 'zfs recv' we noticed that every 128th 8K block required a
read. We were seeing that restore_write() was calling dmu_tx_hold_write()
and the indirect block was not cached. We should prefetch upcoming indirect
blocks to avoid having to go to disk and blocking the restore_write().
Allow an incremental send stream to be received as a clone, even if the
stream does not mark it as a clone.
Diffstat (limited to 'sys/cddl/contrib/opensolaris/uts/common/fs/zfs/space_map.c')
| -rw-r--r-- | sys/cddl/contrib/opensolaris/uts/common/fs/zfs/space_map.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/space_map.c b/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/space_map.c index aeac124..1ea829f 100644 --- a/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/space_map.c +++ b/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/space_map.c @@ -80,8 +80,8 @@ space_map_load(space_map_t *sm, range_tree_t *rt, maptype_t maptype) mutex_exit(sm->sm_lock); if (end > bufsize) { - dmu_prefetch(sm->sm_os, space_map_object(sm), bufsize, - end - bufsize); + dmu_prefetch(sm->sm_os, space_map_object(sm), 0, bufsize, + end - bufsize, ZIO_PRIORITY_SYNC_READ); } mutex_enter(sm->sm_lock); |
