FreeBSD 7-STABLE deadlock!

[Kris Kennaway]

Lev Serebryakov wrote:
> Hello, John.
> You wrote 23 июня 2008 г., 18:47:33:
> 
>> On Monday 16 June 2008 07:21:15 am Lev Serebryakov wrote:
>>> Lev Serebryakov wrote:
>>>>  It seems to be ATA/SATA or UFS2 problem: now I have computer in state,
>>>> when 4 iozone processes are hanged in "Disk wait" state, and I can not
>>>> "cd" to filesystem, which is tested by "iozone".
>>>>  But I can create processes, work on system, etc., if I don't touch this
>>>> filesystem.
>>>    I can reproduce it, creating gmirror on 5 disks (yes, not very useful
>>> configuration, but I've started from non-base-system RAID5 and need to
>>> exclude it), FS with 64Kb blocks, and 4 threads of iozone with mixed
>>> workload (-i 8 -+p 70).
>>>
>>>    All 5 disks are ICH9DO-based, SATA-II WD5000AAKS HDDs.
>> Try getting the 'ps' output from ddb.  Also, get a crash dump if you can.
>   It was tracked douwn to known deadlock in buffer allocator when
>  buffer map is fragmented (thnx to kib@!). Workaround is known: don't
> use FSes with 16Kb and 64Kb blocks on same system in one time. 16/32
> mixture works well :)
> 
> 

Is there a PR filed with this bug?  Having the specific information 
recorded will be very useful.

Kris