Date: Sat, 8 Nov 2014 06:31:52 +0000 (UTC) From: Xin LI <delphij@FreeBSD.org> To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-vendor@freebsd.org Subject: svn commit: r274271 - vendor-sys/illumos/dist/uts/common/fs/zfs vendor/illumos/dist/cmd/zdb Message-ID: <201411080631.sA86Vqil023579@svn.freebsd.org>
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Author: delphij Date: Sat Nov 8 06:31:51 2014 New Revision: 274271 URL: https://svnweb.freebsd.org/changeset/base/274271 Log: 5243 zdb -b could be much faster Reviewed by: Christopher Siden <christopher.siden@delphix.com> Reviewed by: George Wilson <george.wilson@delphix.com> Reviewed by: Richard Elling <richard.elling@gmail.com> Approved by: Dan McDonald <danmcd@omniti.com> Author: Matthew Ahrens <mahrens@delphix.com> illumos/illumos-gate@f7950bf1145637c6dc57742a8bb95631fd5c846f Modified: vendor-sys/illumos/dist/uts/common/fs/zfs/dmu_traverse.c Changes in other areas also in this revision: Modified: vendor/illumos/dist/cmd/zdb/zdb.c Modified: vendor-sys/illumos/dist/uts/common/fs/zfs/dmu_traverse.c ============================================================================== --- vendor-sys/illumos/dist/uts/common/fs/zfs/dmu_traverse.c Sat Nov 8 04:24:54 2014 (r274270) +++ vendor-sys/illumos/dist/uts/common/fs/zfs/dmu_traverse.c Sat Nov 8 06:31:51 2014 (r274271) @@ -59,6 +59,7 @@ typedef struct traverse_data { int td_flags; prefetch_data_t *td_pfd; boolean_t td_paused; + uint64_t td_hole_birth_enabled_txg; blkptr_cb_t *td_func; void *td_arg; } traverse_data_t; @@ -229,25 +230,20 @@ traverse_visitbp(traverse_data_t *td, co } if (bp->blk_birth == 0) { - if (spa_feature_is_active(td->td_spa, SPA_FEATURE_HOLE_BIRTH)) { - /* - * Since this block has a birth time of 0 it must be a - * hole created before the SPA_FEATURE_HOLE_BIRTH - * feature was enabled. If SPA_FEATURE_HOLE_BIRTH - * was enabled before the min_txg for this traveral we - * know the hole must have been created before the - * min_txg for this traveral, so we can skip it. If - * SPA_FEATURE_HOLE_BIRTH was enabled after the min_txg - * for this traveral we cannot tell if the hole was - * created before or after the min_txg for this - * traversal, so we cannot skip it. - */ - uint64_t hole_birth_enabled_txg; - VERIFY(spa_feature_enabled_txg(td->td_spa, - SPA_FEATURE_HOLE_BIRTH, &hole_birth_enabled_txg)); - if (hole_birth_enabled_txg < td->td_min_txg) - return (0); - } + /* + * Since this block has a birth time of 0 it must be a + * hole created before the SPA_FEATURE_HOLE_BIRTH + * feature was enabled. If SPA_FEATURE_HOLE_BIRTH + * was enabled before the min_txg for this traveral we + * know the hole must have been created before the + * min_txg for this traveral, so we can skip it. If + * SPA_FEATURE_HOLE_BIRTH was enabled after the min_txg + * for this traveral we cannot tell if the hole was + * created before or after the min_txg for this + * traversal, so we cannot skip it. + */ + if (td->td_hole_birth_enabled_txg < td->td_min_txg) + return (0); } else if (bp->blk_birth <= td->td_min_txg) { return (0); } @@ -523,6 +519,13 @@ traverse_impl(spa_t *spa, dsl_dataset_t td.td_flags = flags; td.td_paused = B_FALSE; + if (spa_feature_is_active(spa, SPA_FEATURE_HOLE_BIRTH)) { + VERIFY(spa_feature_enabled_txg(spa, + SPA_FEATURE_HOLE_BIRTH, &td.td_hole_birth_enabled_txg)); + } else { + td.td_hole_birth_enabled_txg = 0; + } + pd.pd_blks_max = zfs_pd_blks_max; pd.pd_flags = flags; mutex_init(&pd.pd_mtx, NULL, MUTEX_DEFAULT, NULL);
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