Date: Sat, 3 Oct 2015 07:48:26 +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-10@freebsd.org Subject: svn commit: r288560 - stable/10/sys/cddl/contrib/opensolaris/uts/common/fs/zfs Message-ID: <201510030748.t937mQqv073717@repo.freebsd.org>
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Author: mav Date: Sat Oct 3 07:48:25 2015 New Revision: 288560 URL: https://svnweb.freebsd.org/changeset/base/288560 Log: MFC r286605: 5812 assertion failed in zrl_tryenter(): zr_owner==NULL Reviewed by: George Wilson <george@delphix.com> Reviewed by: Alex Reece <alex@delphix.com> Reviewed by: Will Andrews <will@freebsd.org> Approved by: Gordon Ross <gwr@nexenta.com> Author: Matthew Ahrens <mahrens@delphix.com> illumos/illumos-gate@8df173054ca442cd8845a7364c3edad9d6822351 Modified: stable/10/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/zrlock.c Directory Properties: stable/10/ (props changed) Modified: stable/10/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/zrlock.c ============================================================================== --- stable/10/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/zrlock.c Sat Oct 3 07:47:33 2015 (r288559) +++ stable/10/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/zrlock.c Sat Oct 3 07:48:25 2015 (r288560) @@ -20,6 +20,7 @@ */ /* * Copyright (c) 2010, Oracle and/or its affiliates. All rights reserved. + * Copyright (c) 2014 by Delphix. All rights reserved. */ /* @@ -42,7 +43,7 @@ * A ZRL can be locked only while there are zero references, so ZRL_LOCKED is * treated as zero references. */ -#define ZRL_LOCKED ((uint32_t)-1) +#define ZRL_LOCKED -1 #define ZRL_DESTROYED -2 void @@ -60,7 +61,7 @@ zrl_init(zrlock_t *zrl) void zrl_destroy(zrlock_t *zrl) { - ASSERT(zrl->zr_refcount == 0); + ASSERT0(zrl->zr_refcount); mutex_destroy(&zrl->zr_mtx); zrl->zr_refcount = ZRL_DESTROYED; @@ -80,7 +81,7 @@ zrl_add(zrlock_t *zrl) uint32_t cas = atomic_cas_32( (uint32_t *)&zrl->zr_refcount, n, n + 1); if (cas == n) { - ASSERT((int32_t)n >= 0); + ASSERT3S((int32_t)n, >=, 0); #ifdef ZFS_DEBUG if (zrl->zr_owner == curthread) { DTRACE_PROBE2(zrlock__reentry, @@ -98,7 +99,7 @@ zrl_add(zrlock_t *zrl) while (zrl->zr_refcount == ZRL_LOCKED) { cv_wait(&zrl->zr_cv, &zrl->zr_mtx); } - ASSERT(zrl->zr_refcount >= 0); + ASSERT3S(zrl->zr_refcount, >=, 0); zrl->zr_refcount++; #ifdef ZFS_DEBUG zrl->zr_owner = curthread; @@ -112,14 +113,14 @@ zrl_remove(zrlock_t *zrl) { uint32_t n; - n = atomic_dec_32_nv((uint32_t *)&zrl->zr_refcount); - ASSERT((int32_t)n >= 0); #ifdef ZFS_DEBUG if (zrl->zr_owner == curthread) { zrl->zr_owner = NULL; zrl->zr_caller = NULL; } #endif + n = atomic_dec_32_nv((uint32_t *)&zrl->zr_refcount); + ASSERT3S((int32_t)n, >=, 0); } int @@ -132,14 +133,14 @@ zrl_tryenter(zrlock_t *zrl) (uint32_t *)&zrl->zr_refcount, 0, ZRL_LOCKED); if (cas == 0) { #ifdef ZFS_DEBUG - ASSERT(zrl->zr_owner == NULL); + ASSERT3P(zrl->zr_owner, ==, NULL); zrl->zr_owner = curthread; #endif return (1); } } - ASSERT((int32_t)n > ZRL_DESTROYED); + ASSERT3S((int32_t)n, >, ZRL_DESTROYED); return (0); } @@ -147,11 +148,11 @@ zrl_tryenter(zrlock_t *zrl) void zrl_exit(zrlock_t *zrl) { - ASSERT(zrl->zr_refcount == ZRL_LOCKED); + ASSERT3S(zrl->zr_refcount, ==, ZRL_LOCKED); mutex_enter(&zrl->zr_mtx); #ifdef ZFS_DEBUG - ASSERT(zrl->zr_owner == curthread); + ASSERT3P(zrl->zr_owner, ==, curthread); zrl->zr_owner = NULL; membar_producer(); /* make sure the owner store happens first */ #endif @@ -163,7 +164,7 @@ zrl_exit(zrlock_t *zrl) int zrl_refcount(zrlock_t *zrl) { - ASSERT(zrl->zr_refcount > ZRL_DESTROYED); + ASSERT3S(zrl->zr_refcount, >, ZRL_DESTROYED); int n = (int)zrl->zr_refcount; return (n <= 0 ? 0 : n); @@ -172,7 +173,7 @@ zrl_refcount(zrlock_t *zrl) int zrl_is_zero(zrlock_t *zrl) { - ASSERT(zrl->zr_refcount > ZRL_DESTROYED); + ASSERT3S(zrl->zr_refcount, >, ZRL_DESTROYED); return (zrl->zr_refcount <= 0); } @@ -180,7 +181,7 @@ zrl_is_zero(zrlock_t *zrl) int zrl_is_locked(zrlock_t *zrl) { - ASSERT(zrl->zr_refcount > ZRL_DESTROYED); + ASSERT3S(zrl->zr_refcount, >, ZRL_DESTROYED); return (zrl->zr_refcount == ZRL_LOCKED); }
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