Date: Wed, 7 Oct 2015 10:11:57 -0500 From: Rajil Saraswat <rajil.s@gmail.com> To: freebsd-fs@freebsd.org Subject: Zfs locking up process Message-ID: <CAFoaQoDVt5eJKTjcmGmR2fmQoL_WQV1ZebNUb_K9qLY4=cOi6A@mail.gmail.com> In-Reply-To: <CAFoaQoAt--8pGh_vGVTfVWjEBJ5uRM0Tr6TS-czFbQ-eSHKvXg@mail.gmail.com> References: <CAFoaQoDdKHzASfgxY7ptHuqk=nCsxvpq4q3gr9_QsUK4Hkim9w@mail.gmail.com> <CAFoaQoCB5CmorF4wfabz7iBaqxzxxggdqJiqePUTqLCnFichWA@mail.gmail.com> <CAFoaQoAt--8pGh_vGVTfVWjEBJ5uRM0Tr6TS-czFbQ-eSHKvXg@mail.gmail.com>
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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
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