[CentOS-virt] Xen vs. iSCSI

[Pasi Kärkkäinen]

On Tue, Jun 16, 2009 at 01:57:55PM -0400, Bill McGonigle wrote:
> On 06/15/2009 11:33 PM, Luke S Crawford wrote:
> > xm sched-credit -d 0 60000
> 
> Ah, ha!  This appears to work.  I didn't need to reserve a CPU for the 
> dom0 (knock on wood).  Much obliged, Luke.
> 
> I'm academically curious, though - I seem to have created a CPU deadlock 
> of some sort, yet in 'xm top' none of the CPU's were pegged.  I've got 
> no reason to not give dom0 utmost priority - that makes perfect sense to 
> me - but I'm surprised the Xen scheduler would allow me to get into this 
> situation by default.
> 

Well, you have pretty weird storage setup.. dom0 iSCSI initiator depends on 
domU iSCSI target, which again depends on disks on dom0.. 

-- Pasi