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 and if it safe to disable it ? Why i dont see it in centos 4.2? Thanks in advance. Thai -------------------------------------------------- Where there's will, there's a way ________________________________________________________________________ Check Out the new free AIM(R) Mail -- 2 GB of storage and industry-leading spam and email virus protection.
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 isman irqbalance returns "distribute hardware interrupts across processors on a multiprocessor system" I haven't read the rest of the man page, so I can't/won't try to answer part 2.> and if it safe to disable it ? > Why i dont see it in centos 4.2? > Thanks in advance. > Thai > <snip signature stuff>-- Bill -------------- next part -------------- A non-text attachment was scrubbed... Name: signature.asc Type: application/pgp-signature Size: 189 bytes Desc: This is a digitally signed message part URL: <http://lists.centos.org/pipermail/centos/attachments/20060404/91d4c017/attachment-0001.sig>
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 isAs 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