Re: spin_lock on SCSI

["goetz@xxxxxxxxxxx" <goetz@xxxxxxxxxxx>]

Hi Matt,

I have applied the patch
DragonFly x17.net.intra 2.8-RELEASE DragonFly v2.8.2.16.gfc7bf0-RELEASE 
#3: Sat Nov  6 13:31:53 CET 2010     
root@x17.net.intra:/usr/obj/usr/src/sys/XEON  i386

tested "hammering" the ufs -
and so far your patch solved the problem, great!


Regards Goetz


Matthew Dillon schrieb:
> :Hi,
> :backtrace available at
> :http://www.net-amp.com/test/dump/
> :backtrace above is from fresh install with 2.8.2 CD SMP
> :...
> :happens when starting heavy IO - in this case git pull :-(
>
>     Excellent, that backtrace was very useful.
>
>     Here is an untested kernel source patch for you to try.  You do need
>     to compile up a kernel to test this.  A spinlock was being held
>     through a softupdates callback.  The problem only occurs when running
>     on UFS (and since most of us run on HAMMER we didn't notice).
>
>     fetch http://apollo.backplane.com/DFlyMisc/vfs01.patch
>
> 						-Matt
>
>