Date: Mon, 7 Mar 2011 10:43:05 -0500 From: Roger Hammerstein <cheeky.m@live.com> To: <freebsd-fs@freebsd.org> Subject: FW: sparc64 hang with zfs v28 Message-ID: <BAY147-w47339258F7132192FB05FEF9C70@phx.gbl> In-Reply-To: <BAY147-w229E76D137B7A0DCEB3696F9C70@phx.gbl> References: <BAY147-w7342A790723770DCE8BD4F9C00@phx.gbl>, <20110302200310.GA86404@alchemy.franken.de>, <20110306152245.GA25023@alchemy.franken.de>, <BAY147-w229E76D137B7A0DCEB3696F9C70@phx.gbl>
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forwarding over here.
Anyone using zfs on sparc64 ?=20
Anyone have guesses why zfs/zpool eat 99% of the cpu ?=20
Thanks!
From: cheeky.m@live.com
CC: freebsd-sparc64@freebsd.org
Subject: RE: sparc64 hang with zfs v28
Date: Sun=2C 6 Mar 2011 23:27:42 -0500
> FYI=2C kernel modules generally should work again with r219340=2C I haven=
't
> tested ZFS though.
Thanks!=20
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#=20
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#=20
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 pres=
ent=3B
to enable=2C add "vfs.zfs.prefetch_disable=3D0" to /boot/loader=
.conf.
ZFS filesystem version 5
ZFS storage pool version 28
[Hang here]
last pid: 1012=3B load averages: 0.79=2C 0.30=2C 0.16 =
up 0+00:13:58 20:58:43
23 processes: 2 running=2C 21 sleeping
CPU: 0.0% user=2C 0.0% nice=2C 52.5% system=2C 0.0% interrupt=2C 47.5% i=
dle
Mem: 16M Active=2C 11M Inact=2C 46M Wired=2C 64K Cache=2C 12M Buf=2C 1915M =
Free
Swap: 4055M Total=2C 4055M Free
PID USERNAME THR PRI NICE SIZE RES STATE C TIME WCPU COMMAND =
=20
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"=2C 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=3B load averages: 0.98=2C 0.55=2C 0.24 =
up 0+02:07:39 23:12:33
26 processes: 2 running=2C 24 sleeping
CPU: 0.0% user=2C 0.0% nice=2C 50.2% system=2C 0.4% interrupt=2C 49.4% i=
dle
Mem: 18M Active=2C 13M Inact=2C 46M Wired=2C 64K Cache=2C 12M Buf=2C 1911M =
Free
Swap: 4055M Total=2C 4055M Free
PID USERNAME THR PRI NICE SIZE RES STATE C TIME WCPU COMMAND =
=20
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#=20
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=2C0x0=2C0x0) =3D 0 (0x0)
1014: sigprocmask(SIG_BLOCK=2CSIGHUP|SIGINT|SIGQUIT|SIGKILL|SIGPIPE|SIGALR=
M|SIGTERM|SIGURG|SIGSTOP|SIGTSTP|SIGCONT|SIGCHLD|SIGTTIN|SIGTTOU|SIGIO|SIGX=
CPU|SIGXFSZ|SIGVTALRM|SIGPROF|SIGWINCH|SIGINFO|SIGUSR1|SIGUSR2=2C0x0) =3D 0=
(0x0)
1014: sigprocmask(SIG_SETMASK=2C0x0=2C0x0) =3D 0 (0x0)
1014: sigprocmask(SIG_BLOCK=2CSIGHUP|SIGINT|SIGQUIT|SIGKILL|SIGPIPE|SIGALR=
M|SIGTERM|SIGURG|SIGSTOP|SIGTSTP|SIGCONT|SIGCHLD|SIGTTIN|SIGTTOU|SIGIO|SIGX=
CPU|SIGXFSZ|SIGVTALRM|SIGPROF|SIGWINCH|SIGINFO|SIGUSR1|SIGUSR2=2C0x0) =3D 0=
(0x0)
1014: sigprocmask(SIG_SETMASK=2C0x0=2C0x0) =3D 0 (0x0)
1014: modfind(0x40d3f140=2C0x9a0=2C0xc78=2C0x10a=2C0x1027e8=2C0x7fdffffe8d=
0) =3D 303 (0x12f)
1014: open("/dev/zfs"=2CO_RDWR=2C06170) =3D 3 (0x3)
1014: open("/dev/zero"=2CO_RDONLY=2C0666) =3D 4 (0x4)
1014: open("/etc/zfs/exports"=2CO_RDONLY=2C0666) ERR#2 'No such file or=
directory'
1014: __sysctl(0x7fdffff8de8=2C0x2=2C0x7fdffff8eb0=2C0x7fdffff8f18=2C0x40d=
3f118=2C0x13) =3D 0 (0x0)
1014: __sysctl(0x7fdffff8eb0=2C0x4=2C0x40e4d084=2C0x7fdffff8fe0=2C0x0=2C0x=
0) =3D 0 (0x0)
[hang]
ctrl-t=20
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 insta=
ll=2C 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 /d=
ev/da[36]
=
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