Date: Wed, 26 Jul 2017 17:36:31 +0000 (UTC) From: Alexander Motin <mav@FreeBSD.org> To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-stable@freebsd.org, svn-src-stable-11@freebsd.org Subject: svn commit: r321568 - stable/11/sys/cddl/contrib/opensolaris/uts/common/fs/zfs Message-ID: <201707261736.v6QHaViP098908@repo.freebsd.org>
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Author: mav Date: Wed Jul 26 17:36:30 2017 New Revision: 321568 URL: https://svnweb.freebsd.org/changeset/base/321568 Log: MFC r318935: MFV r318934: 8070 Add some ZFS comments illumos/illumos-gate@40713f2b249d289022c715107b3951055a63aef0 https://github.com/illumos/illumos-gate/commit/40713f2b249d289022c715107b3951055a63aef0 https://www.illumos.org/issues/8070 Add some ZFS comments left by various developers at different times Reviewed by: Yuri Pankov <yuri.pankov@gmail.com> Reviewed by: Matthew Ahrens <mahrens@delphix.com> Approved by: Robert Mustacchi <rm@joyent.com> Author: Alan Somers <asomers@gmail.com> Modified: stable/11/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/dbuf.c stable/11/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/dsl_scan.c Directory Properties: stable/11/ (props changed) Modified: stable/11/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/dbuf.c ============================================================================== --- stable/11/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/dbuf.c Wed Jul 26 17:35:52 2017 (r321567) +++ stable/11/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/dbuf.c Wed Jul 26 17:36:30 2017 (r321568) @@ -1219,6 +1219,11 @@ dbuf_unoverride(dbuf_dirty_record_t *dr) uint64_t txg = dr->dr_txg; ASSERT(MUTEX_HELD(&db->db_mtx)); + /* + * This assert is valid because dmu_sync() expects to be called by + * a zilog's get_data while holding a range lock. This call only + * comes from dbuf_dirty() callers who must also hold a range lock. + */ ASSERT(dr->dt.dl.dr_override_state != DR_IN_DMU_SYNC); ASSERT(db->db_level == 0); Modified: stable/11/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/dsl_scan.c ============================================================================== --- stable/11/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/dsl_scan.c Wed Jul 26 17:35:52 2017 (r321567) +++ stable/11/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/dsl_scan.c Wed Jul 26 17:36:30 2017 (r321568) @@ -807,7 +807,7 @@ dsl_scan_visitbp(blkptr_t *bp, const zbookmark_phys_t return; /* - * If dsl_scan_ddt() has aready visited this block, it will have + * If dsl_scan_ddt() has already visited this block, it will have * already done any translations or scrubbing, so don't call the * callback again. */ @@ -1474,6 +1474,7 @@ dsl_scan_active(dsl_scan_t *scn) return (used != 0); } +/* Called whenever a txg syncs. */ void dsl_scan_sync(dsl_pool_t *dp, dmu_tx_t *tx) { @@ -1892,6 +1893,7 @@ dsl_scan_scrub_cb(dsl_pool_t *dp, return (0); } +/* Called by the ZFS_IOC_POOL_SCAN ioctl to start a scrub or resilver */ int dsl_scan(dsl_pool_t *dp, pool_scan_func_t func) {
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