On Sun, 2014-08-31 at 03:10 +0100, Ian Campbell wrote: > (copying debian-kernel for reasons which will hopefully become obvious) > > On Mon, 8 Jul 2013 18:10:58 +0200 =?UTF-8?Q?Moritz_M=C3=BChlenhoff?= > <[email protected]> wrote: > > In current Debian kernel there's no special Xen dom0 kernel image and > > depending > > on irqbalance in the kernel package would be overkill. > > Would it? I thought irqbalance is actually required even for native with > modern kernels, since the kernel doesn't do any balancing by itself (any > more, it did use to).
I don't know that it's generally required, but it can be useful if there
is a lot of work done in interrupt or softirq context (and have multiple
processors).
> Looking on my laptop for instance I see that all interrupts are going to
> CPU0 out of the 4 processes. On the other hand my workstation does seem
> to have balanced IRQs despite having no irqbalanced running, so I don't
> know.
>
> I reckon the kernel probably should recommend irqbalance these days, but
> in any case there is no reason for Xen to do something different (since
> IRQ balancing should work as on native).
At least kernels that support SMP could recommend it.
Ben.
--
Ben Hutchings
Experience is directly proportional to the value of equipment destroyed.
- Carolyn Scheppner
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