Re: [Xen-devel] Possible regression: XEN 4.0.0 total_memory decrease

[Keir Fraser <keir.fraser@xxxxxxxxxxxxx>]

On 19/04/2010 08:35, "Jan Beulich" <JBeulich@xxxxxxxxxx> wrote:

>> boot_e820 has chunks cut out of it for stashing kexec stuff, as well as all
>> the multiboot modules. The value thereby obtained is just confusing to users
>> who think we've binned possibly 100s of megabytes (if they run a big
>> initrd).
> 
> The piece cut off for kexec imo shouldn't be counted as (usable)
> system RAM; the piece for the multiboot modules certainly should,
> but perhaps it would then be better to account for that explicitly
> instead of reporting a possibly much higher value than is actually
> available at runtime?

I think it's quite open to debate what should be included in total_memory.
Certainly I think kexec can be, as why is it different from any other in-use
memory in the system in that regard?

 -- Keir



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