From owner-freebsd-current@freebsd.org Sun Oct 11 10:29:31 2020 Return-Path: Delivered-To: freebsd-current@mailman.nyi.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2610:1c1:1:606c::19:1]) by mailman.nyi.freebsd.org (Postfix) with ESMTP id A31C743F30E for ; Sun, 11 Oct 2020 10:29:31 +0000 (UTC) (envelope-from ohartmann@walstatt.org) Received: from mout.gmx.net (mout.gmx.net [212.227.17.22]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange ECDHE (P-256) server-signature RSA-PSS (4096 bits) server-digest SHA256 client-signature RSA-PSS (2048 bits) client-digest SHA256) (Client CN "mout.gmx.net", Issuer "TeleSec ServerPass Class 2 CA" (verified OK)) by mx1.freebsd.org (Postfix) with ESMTPS id 4C8J2f53cZz41HW for ; Sun, 11 Oct 2020 10:29:30 +0000 (UTC) (envelope-from ohartmann@walstatt.org) X-UI-Sender-Class: 01bb95c1-4bf8-414a-932a-4f6e2808ef9c Received: from hermann.fritz.box ([78.54.17.89]) by mail.gmx.com (mrgmx105 [212.227.17.168]) with ESMTPSA (Nemesis) id 1MxDou-1kGKFU1cYC-00xcWC for ; Sun, 11 Oct 2020 12:29:28 +0200 Date: Sun, 11 Oct 2020 12:29:20 +0200 From: "Hartmann, O." To: FreeBSD CURRENT Subject: r366623: lock order reversal in ZFS Message-ID: <20201011122920.60b91a18@hermann.fritz.box> Organization: walstatt.org MIME-Version: 1.0 Content-Type: multipart/signed; boundary="Sig_/Ms0EgWPaOJULScusCc//Abz"; protocol="application/pgp-signature"; micalg=pgp-sha256 X-Provags-ID: V03:K1:xNyIXrWaP2bfr+59OWXreCUaPNBMQ9LoQ2l/UcWUYo3qfqEEwlJ 3EO2vDcbvJOaneh5++ZHTovdIBAckl/RcfGc7phbnd9fp/wHWAkeQYLYl8Mpe3x3eSbTmaC qmb+/nihiH0Lmzora3Lu0KyAQPjRNZGckLeKachnd2OwuvZ5p+oX0d/0+EAWnmg06yuzuM9 tmjMkcmNHS35W/6xOSZwQ== X-Spam-Flag: NO X-UI-Out-Filterresults: notjunk:1;V03:K0:4u5wd+54F6o=:HQ29PPoLf3BqMn6+Zlh6y+ SJdvBIBCEaD02pMKU4MAnMknaHA7CYo67YFfvD0bIJr65I6CURDVmVeaSyWGzNf/N+5DSI9mv YExGenqRNCtRPA58nane3HbAVz2doYMrqICYRRGZyi0ubjuZsphuSYVcjj7G3d4GGg/6jmVFZ w8Lap7LKXXPG+D4cHY8wQth7LLD6AdAQZ+0cGwxuAsLTNKjATQFgomy8gPL0UnuUMyFYBd5o9 A9EuRcFIIhBfVj3DIV26NS30F2/xvFCmMLBvbs9DwG+nVosjY14s3PXQHK4SUDL63q6Jgqt0t SY0w2AKwVt0+UrVMO8Ijkl8difWHOSiri5TZwxaSkteVOVW9a0XeXviZlBmvgkt80ZX0nXMx3 9OV5Uc9e4EbUpAfvbFbjUDk1B1AlO6fmV7DecITbGB8fprg9Nhte877xjeGewZBeMOAlPjO8Y JmMGhSOqaIz/xnae35EkessxaS5JtU6La4YGS4Fi0Jt9jvicDnHeqWW/eAtvyCVgDr6/QPU2y QyRHp7SnuzgB5akcRvFMH6FsIHWaWZKhl2QT0oGgzSZOVvX9CEobrsMrWIslg0qDhy1xmc6XR wW9qr1QHTEcDoMPmrmy/SHmFhW6h3RS71Rfs7froVLUesmp0vd62NscsAVveBWq84+BTAsgRk s95yGW1MA+vtKVjz/uEBtaZNaSshaPMvu/CO/jh8BsMxuk3UiqmO0ym3PnBGfT2Sf5A9XhI8H aO4t0O+Jgx7f3MfktUW+aTkkfmojk9SgmZK2Tnqfdzzmi9yGReoBxeagfSjxGzkQQFtkp9nHa PLAhxEqoSW/xr9JF1ZioqMplIxXUl4Nmqgn5M8XIPG/X6e4nKq3rw52n+cFwC8nqO67hh2LCm YOQPoGqQavM+uO7PfdCogcMavC9iNsMDgS6UZN/eDzpiA2AClz7VVtqFAiOuEPt1naNUerncR Z0DTYRCfYdSL07ibpiJoNiD9Jmgcr4oQ/yKtF1ZJuNqj2cdXdRRpcHRd/MEfYvGKLITvt58/g MyX3yj9tnp4VAzVSEebb9JXbJvr7aoRbnf08mNhFQdS7BReq29sjXP5rBn7YkUU1P6+VDRlhR TYOlkAOxWU/NXTY6Jfn79TBOYe58ZVfOhsXlsB6XaLYCg/SaNIOiQZ4iXkqRU816wYezd/eOc ccYr1F9eSR0rOvCQRLtIxqPuo95smVp/cpzCKB0f8sTVlR5ZY9NQhQSeu2WfZvNK4LMl14Uek Xr2QE3LP9+0jQogon+SVNCbFqfnWFbqLj3csurQ== X-Rspamd-Queue-Id: 4C8J2f53cZz41HW X-Spamd-Bar: - X-Spamd-Result: default: False [-1.96 / 15.00]; RCVD_TLS_ALL(0.00)[]; RCVD_VIA_SMTP_AUTH(0.00)[]; R_DKIM_ALLOW(-0.20)[gmx.net:s=badeba3b8450]; RWL_MAILSPIKE_POSSIBLE(0.00)[212.227.17.22:from]; FROM_HAS_DN(0.00)[]; TO_MATCH_ENVRCPT_ALL(0.00)[]; NEURAL_HAM_LONG(-0.04)[-0.035]; MIME_GOOD(-0.20)[multipart/signed,text/plain]; PREVIOUSLY_DELIVERED(0.00)[freebsd-current@freebsd.org]; ARC_NA(0.00)[]; RCPT_COUNT_ONE(0.00)[1]; HAS_ORG_HEADER(0.00)[]; RECEIVED_SPAMHAUS_PBL(0.00)[78.54.17.89:received]; DMARC_NA(0.00)[walstatt.org]; TO_DN_ALL(0.00)[]; DKIM_TRACE(0.00)[gmx.net:+]; NEURAL_HAM_SHORT(-0.52)[-0.521]; NEURAL_HAM_MEDIUM(-0.90)[-0.902]; R_SPF_NA(0.00)[no SPF record]; FROM_EQ_ENVFROM(0.00)[]; MIME_TRACE(0.00)[0:+,1:+,2:~]; RCVD_COUNT_TWO(0.00)[2]; ASN(0.00)[asn:8560, ipnet:212.227.0.0/16, country:DE]; MAILMAN_DEST(0.00)[freebsd-current]; RCVD_IN_DNSWL_LOW(-0.10)[212.227.17.22:from] X-BeenThere: freebsd-current@freebsd.org X-Mailman-Version: 2.1.33 Precedence: list List-Id: Discussions about the use of FreeBSD-current List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Sun, 11 Oct 2020 10:29:31 -0000 --Sig_/Ms0EgWPaOJULScusCc//Abz Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: quoted-printable On a recent CURRENT bos acting as poudriere host, we face after a crash under heavy load and extensive swap usage now this lock order reversal warning on the console: lock order reversal: 1st 0xfffff8007bdd9e00 zfs (zfs, lockmgr) @ /usr/src/sys/kern/vfs_mount.c:1018 2nd 0xfffff8034abfc070 devfs (devfs, lockmgr) @ /usr/src/sys/kern/vfs_mount.c:1029 lock order zfs -> devfs attempted at: #0 0xffffffff80f3380d at witness_checkorder+0xebd #1 0xffffffff80e8ba4b at lockmgr_xlock+0xab #2 0xffffffff80fc3e04 at _vn_lock+0x54 #3 0xffffffff80fa0e34 at vfs_domount+0xde4 #4 0xffffffff80f9f598 at vfs_donmount+0x898 #5 0xffffffff80f9ecb9 at sys_nmount+0x69 #6 0xffffffff81461255 at amd64_syscall+0x135 #7 0xffffffff814335ee at fast_syscall_common+0xf8 System: FreeBSD 13.0-CURRENT #71 r366623: Sun Oct 11 08:59:17 CEST 2020 --Sig_/Ms0EgWPaOJULScusCc//Abz Content-Type: application/pgp-signature Content-Description: OpenPGP digital signature -----BEGIN PGP SIGNATURE----- iHUEARYIAB0WIQSy8IBxAPDkqVBaTJ44N1ZZPba5RwUCX4LegAAKCRA4N1ZZPba5 R94nAQDOamlyZwm+nddju1WV87cuWK+j08x9x0ZxNJk4LF272wEA6o8vSABFXfbh of3edFBeER69ffg28qoUS5oSwpNLAgQ= =DYBM -----END PGP SIGNATURE----- --Sig_/Ms0EgWPaOJULScusCc//Abz--