Re: [PATCH 1/6] KVM: In kernel pit model

[Ingo Molnar <mingo@elte.hu>]

* Yang, Sheng <sheng.yang@intel.com> wrote:

> > * Yang, Sheng <sheng.yang@intel.com> wrote:
> > > +#if 1
> > > +#define pit_debug(fmt, arg...) printk(KERN_WARNING fmt, ##arg)
> > > +#else
> > > +#define pit_debug(fmt, arg...)
> > > +#endif
> >
> > this should use pr_debug() instead i guess.
> 
> Um... I followed example on ./virt/kvm/ioapic.c here. Though I think 
> it's good to substitute all self defined debug printk with pr_debug, 
> why KVM have little pr_xxx(the only ones are in x86.c)? Maybe for KVM 
> is acting more like a separate driver, and using printk is easier for 
> separate debug? I really don't know...

it's just a small detail - it's really not a big issue and my suggestion 
should be functionally equivalent. What i meant is that with pr_debug() 
you can remove the pit_debug() define altogether (and change all 
pit_debug's to pr_debug). In that case all you need to do is to get the 
printks is to stick this to the head of the source code file (to before 
the include files):

#define DEBUG

and the pr_debug() calls turn from a NOP into a printk(KERN_DEBUG,...).

	Ingo

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