Re: [PATCH v9 1/2] Documentation: kdump: remind user of nr_cpus

[Jonathan Corbet]

On Fri, 19 Aug 2016 08:33:21 +0800
"Zhou, Wenjian/åæå" <zhouwj-fnst@xxxxxxxxxxxxxx> wrote:

> I was also confused by maxcpus and nr_cpus before writing this patch.
> I think it is a good choice to describe it in kernel-parameters.txt.
> 
> Then, only two things need to be done I think.
> One is move the above description to maxcpus= in kernel-parameters.txt.
> And the other is replace maxcpus with maxcpus/nr_cpus in kdump.txt.
> 
> How do you think?

That is not quite what I had in mind, sorry.  What I would really like to
see in kernel-parameters.txt is an explanation of how those two parameters
differ - what do they do differently and how should a user choose one over
the other?  What we have now offers no guidance in that matter.

I suspect that may be a bit more than you had signed up to do.  As an
intermediate step, how about this: rather than tacking on those lines in
kdump.txt, rewrite that paragraph to simply say what the reader should
use.  If nr_cpus is good for everybody, just say that, but your previous
patch suggests that the situation isn't quite that simple?

Thanks,

jon