FW: sparc64 hang with zfs v28
Roger Hammerstein
cheeky.m at live.com
Mon Mar 7 15:43:07 UTC 2011
forwarding over here.
Anyone using zfs on sparc64 ?
Anyone have guesses why zfs/zpool eat 99% of the cpu ?
Thanks!
From: cheeky.m at live.com
CC: freebsd-sparc64 at freebsd.org
Subject: RE: sparc64 hang with zfs v28
Date: Sun, 6 Mar 2011 23:27:42 -0500
> 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 at 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.
I can successfully read the labels on those two mirror disks with zdb -l /dev/da[36]
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