linux-kernel - Re: [PATCH 1/2] Documentation: kdump: update maxcpus to nr

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Message-ID: <20160730021959.GC2583@x1.redhat.com>
Date:	Sat, 30 Jul 2016 10:19:59 +0800
From:	Baoquan He <bhe@...hat.com>
To:	Zhou Wenjian <zhouwj-fnst@...fujitsu.com>
Cc:	linux-kernel@...r.kernel.org, kexec@...ts.infradead.org,
	dyoung@...hat.com, d.hatayama@...fujitsu.com
Subject: Re: [PATCH 1/2] Documentation: kdump: update maxcpus to nr_cpus

On 07/29/16 at 11:23am, Zhou Wenjian wrote:
> Parameter nr_cpus is used to bring up a SMP dump-capture kernel,
> instead of the old parameter maxcpus. This commit update it in
> Documentation/kdump/kdump.txt.
> 
> Signed-off-by: Zhou Wenjian <zhouwj-fnst@...fujitsu.com>
> ---
>  Documentation/kdump/kdump.txt | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/Documentation/kdump/kdump.txt b/Documentation/kdump/kdump.txt
> index 88ff63d..9a77247 100644
> --- a/Documentation/kdump/kdump.txt
> +++ b/Documentation/kdump/kdump.txt
> @@ -392,7 +392,7 @@ Notes on loading the dump-capture kernel:
>  
>  * We generally don' have to bring up a SMP kernel just to capture the
>    dump. Hence generally it is useful either to build a UP dump-capture
> -  kernel or specify maxcpus=1 option while loading dump-capture kernel.
> +  kernel or specify nr_cpus=1 option while loading dump-capture kernel.


IIRC, ARCHes like ppc don't have nr_cpus yet, maxpcus is necessary. So
either you explicitly tell which can use nr_cpus and which can only use
maxcpus option, or drop this patch for now.

>  
>  * For s390x there are two kdump modes: If a ELF header is specified with
>    the elfcorehdr= kernel parameter, it is used by the kdump kernel as it
> -- 
> 1.8.3.1
> 
> 
>