[CentOS] irqbalance is dead, can not shutdown

Tue Apr 4 20:48:37 UTC 2006
William Warren <hescominsoon at emmanuelcomputerconsulting.com>

if you don't have more than one cpu(HT doesn't count) then you don't 
need irqbalance.  I have it disabled on all of my UP systems without 
negative effects.

James Olin Oden wrote:
> On 4/4/06, William L. Maltby <BillsCentOS at triad.rr.com> wrote:
>> On Tue, 2006-04-04 at 10:28 -0400, lnthai2002 at aim.com wrote:
>>> After updating to centos 4.3, I notice a failure in terminating
>>> irqbalance whenever i shutdown the system. Checking the services after
>>> the system reboot i see the error in irqbalance:
>>> "irqbalance dead but subsys locked"
>>> Can anyone tell me what irqbalance is
> As the other person said it distrubutes IRQ's across multiple
> processors in an SMP system.  You don't want to disable this as it
> will impact system performance.  Just as a quick explanation, by
> default all of the IRQ's (the signals that let hardware devices notify
> the cpu and by extension device drivers know that they need servicing)
> end up on one processor (at least on Intel like architectures).  The
> OS though can balance them across muliple processors which is
> typically more efficient (share the load sort of thing).  I don't know
> the algorithms that irqbalance uses to distribute the IRQ's but it
> definately makes things more efficient.
> So again you don't want to disable this (unless your on a single
> processor machine, and then its a moot point; in this case disable
> away using chkconfig).
> What I would sugest is filing a bugzilla report at bugzilla.redhat.com.
> Cheers...james
> _______________________________________________
> CentOS mailing list
> CentOS at centos.org
> http://lists.centos.org/mailman/listinfo/centos

My "Foundation" verse:
Isa 54:17  No weapon that is formed against thee shall prosper; and 
every tongue that shall rise against thee in judgment thou shalt 
condemn. This is the heritage of the servants of the LORD, and their 
righteousness is of me, saith the LORD.

-- carpe ductum -- "Grab the tape"
CDTT (Certified Duct Tape Technician)

Linux user #322099