Re: [PATCH v2] printk: add option to print cpu id

[Borislav Petkov <bp@alien8.de>]

On Fri, Aug 03, 2012 at 12:09:15PM +0200, Kay Sievers wrote:
> That would be needed, I guess. We easily have server systems with more
> than 255 CPUs. It will only be a matter of time, that the number of
> CPUs will increase for everybody, I guess.

Actually, AFAICR, we already have SGI machines booting Linux on 4K cpus. Now.

> > b) to put cpuid in struct cont and struct log - under the #ifdef macro?
> 
> As said, I really can't tell how generally useful it is, and if people
> think that it should be there unconditionally, should not be there at
> all, or as a compile time option. Others might have an opinion on
> that.
> 
> I personally never missed the CPU-ID in the logs. I personally would
> find the PID/task ID more interesting, and even that I never really
> missed. :)

And even then you can add debugging code to dump the stuff you need.

And I have to agree with Kai here, having the cpu number in dmesg is
not something I'd wish for - printk timestampts OTOH has at least some
usecases.

Thanks.

-- 
Regards/Gruss,
Boris.