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DragonFly users List (threaded) for 2010-11
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Re: spin_lock on SCSI

From: "goetz@xxxxxxxxxxx" <goetz@xxxxxxxxxxx>
Date: Sat, 06 Nov 2010 15:21:40 +0100

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:
:backtrace available at
: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


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