Date: Mon, 7 Mar 2011 09:06:26 +0100 From: Marius Strobl <marius@alchemy.franken.de> To: Roger Hammerstein <cheeky.m@live.com> Cc: freebsd-sparc64@freebsd.org Subject: Re: sparc64 hang with zfs v28 Message-ID: <20110307080626.GK57812@alchemy.franken.de> In-Reply-To: <BAY147-w229E76D137B7A0DCEB3696F9C70@phx.gbl> References: <BAY147-w7342A790723770DCE8BD4F9C00@phx.gbl> <BAY147-w229E76D137B7A0DCEB3696F9C70@phx.gbl>
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On Sun, Mar 06, 2011 at 11:27:42PM -0500, Roger Hammerstein wrote:
>
>
> > FYI, kernel modules generally should work again with r219340, I haven't
> > tested ZFS though.
>
>
> Thanks!
> I cvsuppedd and rebuilt kernel.
>
>
>
>
> falcon# uname -a
> FreeBSD falcon 9.0-CURRENT FreeBSD 9.0-CURRENT #3: Sun Mar 6 18:55:14 EST 2011 root@falcon:/usr/obj/usr/src/sys/GENERIC sparc64
> falcon#
>
> I did a kldload zfs and it loaded ok.
>
> falcon# kldstat
> Id Refs Address Size Name
> 1 9 0xc0000000 e42878 kernel
> 2 1 0xc14a2000 32e000 zfs.ko
> 3 1 0xc17d0000 104000 opensolaris.ko
> falcon#
>
>
> But a 'zpool status' or 'zfs list' will cause a zfs or zpool process
> to eat 99% of a cpu and essentially hang the shell i ran zfs/zpool in.
>
>
>
> falcon# zfs list
>
> ZFS NOTICE: Prefetch is disabled by default if less than 4GB of RAM is present;
>
> to enable, add "vfs.zfs.prefetch_disable=0" to /boot/loader.conf.
>
> ZFS filesystem version 5
>
> ZFS storage pool version 28
>
> [Hang here]
>
>
>
>
>
> last pid: 1012; load averages: 0.79, 0.30, 0.16 up 0+00:13:58 20:58:43
>
> 23 processes: 2 running, 21 sleeping
>
> CPU: 0.0% user, 0.0% nice, 52.5% system, 0.0% interrupt, 47.5% idle
>
> Mem: 16M Active, 11M Inact, 46M Wired, 64K Cache, 12M Buf, 1915M Free
>
> Swap: 4055M Total, 4055M Free
>
>
>
> PID USERNAME THR PRI NICE SIZE RES STATE C TIME WCPU COMMAND
>
> 1006 root 1 53 0 21672K 2904K CPU1 1 0:05 99.47% zfs
>
> 998 root 1 40 0 41776K 6376K select 0 0:01 0.00% sshd
>
> 994 root 1 16 0 11880K 3536K pause 0 0:01 0.00% csh
>
> 795 root 1 40 0 16720K 3968K select 0 0:00 0.00% ntpd
>
> 1001 root 1 16 0 11880K 3464K pause 0 0:00 0.00% csh
>
> 975 root 1 8 0 25168K 2672K wait 1 0:00 0.00% login
>
>
>
>
>
>
>
> stays at 99%.
>
> truss -p 1006 doesn't "attach", it just hangs.
>
>
>
> ctrl-t on the zfs list shell:
>
> oad: 0.95 cmd: zfs 1006 [running] 182.26r 0.00u 4.66s 99% 2872k
>
> load: 0.95 cmd: zfs 1006 [running] 183.30r 0.00u 4.66s 99% 2872k
>
> load: 0.95 cmd: zfs 1006 [running] 183.76r 0.00u 4.66s 99% 2872k
>
> load: 0.95 cmd: zfs 1006 [running] 184.08r 0.00u 4.66s 99% 2872k
>
> load: 0.95 cmd: zfs 1006 [running] 184.36r 0.00u 4.66s 99% 2872k
>
>
>
>
> A second time with zpool status::
> last pid: 1224; load averages: 0.98, 0.55, 0.24 up 0+02:07:39 23:12:33
> 26 processes: 2 running, 24 sleeping
> CPU: 0.0% user, 0.0% nice, 50.2% system, 0.4% interrupt, 49.4% idle
> Mem: 18M Active, 13M Inact, 46M Wired, 64K Cache, 12M Buf, 1911M Free
> Swap: 4055M Total, 4055M Free
>
> PID USERNAME THR PRI NICE SIZE RES STATE C TIME WCPU COMMAND
> 1200 root 1 62 0 22704K 2920K CPU1 1 0:00 99.02% zpool
> 793 root 1 40 0 16720K 3968K select 0 0:02 0.00% ntpd
> 1180 root 1 16 0 11880K 3536K pause 1 0:01 0.00% csh
> 1184 root 1 40 0 41776K 6376K select 0 0:01 0.00% sshd
> 1201 root 1 40 0 41776K 6376K select 0 0:01 0.00% sshd
>
> falcon# truss -p 1200
> truss: can not attach to target process: Device busy
> falcon# truss -p 1200
> truss: can not attach to target process: Device busy
> falcon#
>
>
> ctrl-t on the zpool status command:
> load: 0.62 cmd: zpool 1200 [running] 54.30r 0.00u 0.07s 83% 2888k
> load: 0.99 cmd: zpool 1200 [running] 271.73r 0.00u 0.07s 99% 2888k
> load: 0.99 cmd: zpool 1200 [running] 272.37r 0.00u 0.07s 99% 2888k
> load: 0.99 cmd: zpool 1200 [running] 272.75r 0.00u 0.07s 99% 2888k
> load: 0.99 cmd: zpool 1200 [running] 273.38r 0.00u 0.07s 99% 2888k
>
>
>
>
>
> truss -f zpool status::
>
> 1014: sigprocmask(SIG_SETMASK,0x0,0x0) = 0 (0x0)
> 1014: sigprocmask(SIG_BLOCK,SIGHUP|SIGINT|SIGQUIT|SIGKILL|SIGPIPE|SIGALRM|SIGTERM|SIGURG|SIGSTOP|SIGTSTP|SIGCONT|SIGCHLD|SIGTTIN|SIGTTOU|SIGIO|SIGXCPU|SIGXFSZ|SIGVTALRM|SIGPROF|SIGWINCH|SIGINFO|SIGUSR1|SIGUSR2,0x0) = 0 (0x0)
> 1014: sigprocmask(SIG_SETMASK,0x0,0x0) = 0 (0x0)
> 1014: sigprocmask(SIG_BLOCK,SIGHUP|SIGINT|SIGQUIT|SIGKILL|SIGPIPE|SIGALRM|SIGTERM|SIGURG|SIGSTOP|SIGTSTP|SIGCONT|SIGCHLD|SIGTTIN|SIGTTOU|SIGIO|SIGXCPU|SIGXFSZ|SIGVTALRM|SIGPROF|SIGWINCH|SIGINFO|SIGUSR1|SIGUSR2,0x0) = 0 (0x0)
> 1014: sigprocmask(SIG_SETMASK,0x0,0x0) = 0 (0x0)
> 1014: modfind(0x40d3f140,0x9a0,0xc78,0x10a,0x1027e8,0x7fdffffe8d0) = 303 (0x12f)
> 1014: open("/dev/zfs",O_RDWR,06170) = 3 (0x3)
> 1014: open("/dev/zero",O_RDONLY,0666) = 4 (0x4)
> 1014: open("/etc/zfs/exports",O_RDONLY,0666) ERR#2 'No such file or directory'
> 1014: __sysctl(0x7fdffff8de8,0x2,0x7fdffff8eb0,0x7fdffff8f18,0x40d3f118,0x13) = 0 (0x0)
> 1014: __sysctl(0x7fdffff8eb0,0x4,0x40e4d084,0x7fdffff8fe0,0x0,0x0) = 0 (0x0)
> [hang]
> ctrl-t
>
> load: 0.31 cmd: zpool 1014 [running] 12.47r 0.00u 0.07s 44% 2912k
>
>
> 1014 root 1 54 0 22704K 2944K CPU0 0 0:00 98.47% zpool
>
>
> falcon# truss -p 1014
> truss: can not attach to target process: Device busy
>
> iostat -x 1 shows no reads and no writes to any disks
>
>
> There's a 2-disk zfs mirror attached to this ultra60 from a freebsd-8 install, but I don't know
> why that would cause a problem with the latest zfs v28.
>
Me neither :) You'll probably get better help from the ZFS maintainers
than on this list.
Marius
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