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Re: [PATCH v2] Do not reserve crashkernel high memory if crashkernel low memory reserving failed

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  Re: [PATCH v2] Do not reserve crashkernel high memory if crashkernel  low memory reserving failed Joerg Roedel <joro@8bytes.org> - 2015-07-27 16:50 +0200

#1193204 — Re: [PATCH v2] Do not reserve crashkernel high memory if crashkernel low memory reserving failed

On Tue, Jul 21, 2015 at 09:38:14AM +0200, Ingo Molnar wrote:
> Also, why was this syntax introduced in the first place? Why should the user 
> care??
> 
> We should only have a single crashkernel option, to enable it - and everything 
> else should be figured out by the kernel, automatically.
> 
> Any other sub-options just paper over some fragility elsewhere and make the 
> feature harder to use, hence more fragile.

Hmm, maybe the reason is that old userspace (kdump/kexec tools) can't
deal with crashkernel loaded high, so that the default for
crashkernel=size allocations was kept to be under 896MB.

If that's not an issue we can change the default and get rid of the
,high and ,low syntax.


	Joerg

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