Reliably trigger-able ZFS panic

[Quake Lee]

Tue, 04 Mar 2008 03:27:35 +0800，Xin LI <delphij at delphij.net>:
The kernel is
FreeBSD fs12.sina.com.cn 7.0-STABLE FreeBSD 7.0-STABLE #0: Sun Mar  2  
18:50:05 CST 2008     delphij at fs12.sina.com.cn:/usr/obj/usr/src/sys/ZFORK   
amd64

the get all at below:
fs12# zfs get all
NAME     PROPERTY       VALUE                  SOURCE
midpool  type           filesystem             -
midpool  creation       Fri Feb 29 15:01 2008  -
midpool  used           11.1M                  -
midpool  available      2.65T                  -
midpool  referenced     44.7K                  -
midpool  compressratio  1.00x                  -
midpool  mounted        yes                    -
midpool  quota          none                   default
midpool  reservation    none                   default
midpool  recordsize     128K                   default
midpool  mountpoint     /mnt/ztest             local
midpool  sharenfs       off                    default
midpool  checksum       on                     default
midpool  compression    off                    default
midpool  atime          on                     default
midpool  devices        on                     default
midpool  exec           on                     default
midpool  setuid         on                     default
midpool  readonly       off                    default
midpool  jailed         off                    default
midpool  snapdir        hidden                 default
midpool  aclmode        groupmask              default
midpool  aclinherit     secure                 default
midpool  canmount       on                     default
midpool  shareiscsi     off                    default
midpool  xattr          off                    temporary
midpool  copies         1                      default

fs12# zpool get all midpool
NAME     PROPERTY  VALUE   SOURCE
midpool  bootfs    -       default

> Pawel Jakub Dawidek wrote:
>> On Sun, Mar 02, 2008 at 03:49:03AM -0800, LI Xin wrote:
>>> Hi,
>>>
>>> The following iozone test case on ZFS would reliably trigger panic:
>>>
>>> /usr/local/bin/iozone -M -e -+u -T -t 128 -S 4096 -L 64 -R -r 4k -s 30g
>>> -i 0 -i 1 -i 2 -i 8 -+p 70 -C
>>
>> Thanks, I'll try to reproduce it.
>>
>> [...]
>>
>>> #19 0x000000000000b55d in z_deflateInit2_ (strm=0xffffff00042dc8e0,
>>> level=70109184, method=68351768,
>>>     windowBits=68351600, memLevel=76231808, strategy=76231808,
>>> version=Cannot access memory at address 0xffffffff00040010
>>> )
>>>     at
>>> /usr/src/sys/modules/zfs/../../contrib/opensolaris/uts/common/zmod/deflate.c:318
>>
>> Can you send me your FS configuration? zfs get all your/file/system
>> I see that you use compression on this dataset?
>
> It was all default configuration.  The pool was a RAID-Z2 without
> hotspare disk.  The box is now running some other tests (not FreeBSD) at
> our Beijing Lab and we don't have remote hands in the nights, so I'm
> afraid that I will not be able to provide further information at this
> moment.  Please let me know if the test run will not provoke the problem
> and I will ask them to see if they can spare the box in the weekend for  
> me.
>
> Cheers,



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