From owner-freebsd-fs@freebsd.org Wed Oct 7 15:11:59 2015 Return-Path: Delivered-To: freebsd-fs@mailman.ysv.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:1900:2254:206a::19:1]) by mailman.ysv.freebsd.org (Postfix) with ESMTP id E0EC89D152E for ; Wed, 7 Oct 2015 15:11:58 +0000 (UTC) (envelope-from rajil.s@gmail.com) Received: from mail-yk0-x234.google.com (mail-yk0-x234.google.com [IPv6:2607:f8b0:4002:c07::234]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (Client CN "smtp.gmail.com", Issuer "Google Internet Authority G2" (verified OK)) by mx1.freebsd.org (Postfix) with ESMTPS id A9900D0C for ; Wed, 7 Oct 2015 15:11:58 +0000 (UTC) (envelope-from rajil.s@gmail.com) Received: by ykdz138 with SMTP id z138so19956952ykd.2 for ; Wed, 07 Oct 2015 08:11:57 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20120113; h=mime-version:in-reply-to:references:date:message-id:subject:from:to :content-type; bh=WLiLuIgEXwUgVyfmEpHm5goZxOrReXwiFrgIuXVuDdU=; b=gqkZKl4cwMZQN6NGWnf5yaQxlxpVsoazXJepf6EP72N9SlGYocTdxWC7HalLjfTIsz y11Mcl1OhdKP53f1gPwWX5MLR1rvl2GZU6ppLIqq4x5hUT2BVyFo+J/wGTnKBv0AIrrx bqYrzLI3FD9KDM+MFgdrGBwJgHBUbBOtq7QxumucJUOOxfudOG3/uh2MUK2K+eR+QJsD 3TCvK61nwYSV5RYJblRX/mCMP3c5x8oBT3TmQVGFDPIFHlJXObw9rgbMYDevzsLdqpBj Ds4jRwva3XGGshTwSBGZLqouEMI0qJ7mh/0+MpVly8F/TxhzOvzveVQcIYgD/mXzGp3s TdQg== MIME-Version: 1.0 X-Received: by 10.13.202.136 with SMTP id m130mr1351978ywd.127.1444230717697; Wed, 07 Oct 2015 08:11:57 -0700 (PDT) Received: by 10.37.214.14 with HTTP; Wed, 7 Oct 2015 08:11:57 -0700 (PDT) Received: by 10.37.214.14 with HTTP; Wed, 7 Oct 2015 08:11:57 -0700 (PDT) In-Reply-To: References: Date: Wed, 7 Oct 2015 10:11:57 -0500 Message-ID: Subject: Zfs locking up process From: Rajil Saraswat To: freebsd-fs@freebsd.org Content-Type: text/plain; charset=UTF-8 X-Content-Filtered-By: Mailman/MimeDel 2.1.20 X-BeenThere: freebsd-fs@freebsd.org X-Mailman-Version: 2.1.20 Precedence: list List-Id: Filesystems List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Wed, 07 Oct 2015 15:11:59 -0000 Hello I have server running Freenas 9.3 with a few jails. The machine has two new disks setup in mirror. I have a dataset (/mnt/tank/media) which is shared in two jails. Unfortunately, sometimes when I do a ls in a jail in the shared directory I see that the process just hangs. Today in the jail I did an 'su' and process just hung. On the host if i do ls /mnt/tank/media it also hangs. The su process (pid 77477) is taking up 100% cpu in the jail. It seems that zfs is holding up the process. Any idea what could be wrong? Thanks Rajil On the host [root@freenas] ~# ps O nwchan PID NWCHAN TT STAT TIME COMMAND 14248 fffffe000962c8a8 v0 Is+ 0:00.73 python /etc/netcli (python2.7) 14249 fffffe000962c4a8 v1 Is+ 0:00.00 /usr/libexec/getty Pc ttyv1 14250 fffffe000962c0a8 v2 Is+ 0:00.00 /usr/libexec/getty Pc ttyv2 14251 fffffe000962cca8 v3 Is+ 0:00.00 /usr/libexec/getty Pc ttyv3 14252 fffffe00096284a8 v4 Is+ 0:00.00 /usr/libexec/getty Pc ttyv4 14253 fffffe000962eca8 v5 Is+ 0:00.00 /usr/libexec/getty Pc ttyv5 14254 fffffe000962e8a8 v6 Is+ 0:00.00 /usr/libexec/getty Pc ttyv6 14255 fffffe000962e4a8 v7 Is+ 0:00.00 /usr/libexec/getty Pc ttyv7 77477 - 2- R+J 36:49.59 _su (csh) 77541 fffffe0043d31488 3- D+J 0:00.01 _su (csh) 45586 fffffe00a44050a0 0 Is 0:00.02 -csh (csh) 74258 fffffe00076824a8 0 I+J 0:00.01 csh 77586 fffffe0043d31488 4 Ds+ 0:00.01 -csh (csh) 77621 fffffe0043d31488 5- D+ 0:00.00 ls -GFa 77626 fffffe01e7a214a8 6 Is+ 0:00.02 -csh (csh) 79795 fffffe0055e540a0 8 Ss 0:00.01 -csh (csh) 79798 - 8 R+ 0:00.00 ps O nwchan [root@freenas] ~# ps O wchan PID WCHAN TT STAT TIME COMMAND 14248 ttyin v0 Is+ 0:00.73 python /etc/netcli (python2.7) 14249 ttyin v1 Is+ 0:00.00 /usr/libexec/getty Pc ttyv1 14250 ttyin v2 Is+ 0:00.00 /usr/libexec/getty Pc ttyv2 14251 ttyin v3 Is+ 0:00.00 /usr/libexec/getty Pc ttyv3 14252 ttyin v4 Is+ 0:00.00 /usr/libexec/getty Pc ttyv4 14253 ttyin v5 Is+ 0:00.00 /usr/libexec/getty Pc ttyv5 14254 ttyin v6 Is+ 0:00.00 /usr/libexec/getty Pc ttyv6 14255 ttyin v7 Is+ 0:00.00 /usr/libexec/getty Pc ttyv7 77477 - 2- R+J 36:49.59 _su (csh) 77541 zfs 3- D+J 0:00.01 _su (csh) 45586 pause 0 Is 0:00.02 -csh (csh) 74258 ttyin 0 I+J 0:00.01 csh 77586 zfs 4 Ds+ 0:00.01 -csh (csh) 77621 zfs 5- D+ 0:00.00 ls -GFa 77626 ttyin 6 Is+ 0:00.02 -csh (csh) 79795 pause 8 Ss 0:00.01 -csh (csh) 79800 - 8 R+ 0:00.00 ps O wchan Inside the jail [r@sshserver ~]$ ps -axl UID PID PPID CPU PRI NI VSZ RSS MWCHAN STAT TT TIME COMMAND 0 9438 1 0 31 0 12084 1916 select IsJ ?? 0:00.00 dhclient: epair3b [priv] (dhclient) 65 9490 1 0 20 0 12084 1976 select IsJ ?? 0:00.00 dhclient: epair3b (dhclient) 0 9878 1 0 20 0 12080 1868 select SsJ ?? 0:00.03 /usr/sbin/syslogd -s 0 9948 1 0 20 0 14184 1860 nanslp IsJ ?? 0:00.03 /usr/sbin/cron -s 0 45452 1 0 22 0 52036 4916 select IsJ ?? 0:00.01 sshd: r [priv] (sshd) 1001 45454 45452 0 20 0 52036 5000 select IJ ?? 0:00.01 sshd: r@pts/1 (sshd) 0 71094 1 0 20 0 26728 4456 select SsJ ?? 0:00.00 /usr/local/sbin/sshd 0 79100 71094 0 22 0 52036 4912 select IsJ ?? 0:00.01 sshd: r [priv] (sshd) 1001 79102 79100 0 20 0 52036 4948 select IJ ?? 0:00.00 sshd: r@pts/7 (sshd) 0 80400 71094 0 23 0 52036 4912 select IsJ ?? 0:00.01 sshd: r [priv] (sshd) 1001 80402 80400 0 20 0 52036 4920 select IJ ?? 0:00.00 sshd: r@pts/8 (sshd) 0 80634 71094 0 22 0 52036 4912 select SsJ ?? 0:00.01 sshd: r [priv] (sshd) 1001 80636 80634 0 20 0 52036 4920 select SJ ?? 0:00.00 sshd: r@pts/9 (sshd) 0 77477 1 0 20 0 17568 2556 - R+J 2- 76:29.08 _su (csh) 0 77541 1 0 20 0 17568 3156 zfs D+J 3- 0:00.01 _su (csh) 1001 45455 45454 0 20 0 17512 3252 ttyin Is+J 1 0:00.00 -bash (bash) 1001 79103 79102 0 20 0 17512 3332 ttyin Is+J 7 0:00.00 -bash (bash) 1001 80403 80402 0 20 0 17512 3332 ttyin Is+J 8 0:00.00 -bash (bash) 1001 80637 80636 0 20 0 17512 3332 wait SsJ 9 0:00.00 -bash (bash) 1001 80641 80637 0 20 0 16296 1852 - R+J 9 0:00.00 ps -axl