[PATCH 1/1 v1] the recommended crash memory reservation is too small for x86_64.

[Simon Horman]

On Mon, Mar 25, 2013 at 06:56:49PM +0800, zhouzhouyi at gmail.com wrote:
> From: root <root at zzy-Lenovo.(none)>

The above line is bogus.

>  On Documentation/kdump/kdump.txt, section Boot into  System Kernel: On x86 and x86_64, use
>  "crashkernel=64M at 16M", but some OSes like ubuntu 12.10 use ram fs larger than 64M, so in these cases the
>  memory reserved for crashkernel should be at least 128M.

The above lines are way to wide. Something less than 80 columns is normal.

> Signed-off-by: Zhouyi Zhou <yizhouzhou at ict.ac.cn>
> ---
>  Documentation/kdump/kdump.txt |    4 +++-
>  1 file changed, 3 insertions(+), 1 deletion(-)
> 
> diff --git a/Documentation/kdump/kdump.txt b/Documentation/kdump/kdump.txt
> index 13f1aa0..1e850e0 100644
> --- a/Documentation/kdump/kdump.txt
> +++ b/Documentation/kdump/kdump.txt
> @@ -290,7 +290,9 @@ Boot into System Kernel
>     "crashkernel=64M at 16M" tells the system kernel to reserve 64 MB of memory
>     starting at physical address 0x01000000 (16MB) for the dump-capture kernel.
>  
> -   On x86 and x86_64, use "crashkernel=64M at 16M".
> +   On x86 and x86_64, use "crashkernel=64M at 16M" (some OSes use init ram fs larger
> +than 64M, for example ubuntu-12.10, use crashkernel=128M at 16M instead, or dump-capture
> +kernel will out of memory).

I believe lines of kdmump.txt should also be 80 columns wide or less.

>     On ppc64, use "crashkernel=128M at 32M".
>  
> -- 
> 1.7.10.4
> 
> 
> _______________________________________________
> kexec mailing list
> kexec at lists.infradead.org
> http://lists.infradead.org/mailman/listinfo/kexec
>