Re: [Xen-devel] [Xen-users] xl info displays less ram than the total available

[Konrad Rzeszutek Wilk <konrad.wilk@xxxxxxxxxx>]

On Thu, Oct 06, 2016 at 12:59:13PM +0200, Blallo wrote:
> I'm using grub2. After the lunch break I can post the full grub menu entry 
> and the exact version of grub2.

Cc-ing Daniel (who is now an GRUB2 maintainer).

Is this by chance an EFI box?And you are booting using EFI GRUB2?
> 
> 
> On 6 October 2016 12:55:16 CEST, George Dunlap <george.dunlap@xxxxxxxxxx> 
> wrote:
> >On Wed, Oct 5, 2016 at 3:01 PM, Jan Beulich <JBeulich@xxxxxxxx> wrote:
> >>>>> On 05.10.16 at 15:32, <blallo@xxxxxxxxxx> wrote:
> >>> Here it comes xl dmesg with Xen booted with e820-verbose=true
> >>
> >> I have to admit that the only way I can see
> >>
> >> (XEN) Initial Xen-e820 RAM map:
> >> (XEN)  0000000000000000 - 000000000009ec00 (usable)
> >> (XEN)  000000000009ec00 - 00000000000a0000 (reserved)
> >> (XEN)  00000000000e0000 - 0000000000100000 (reserved)
> >> (XEN)  0000000000100000 - 0000000079cbe000 (usable)
> >> (XEN)  0000000079cbe000 - 00000000bcd2f000 (reserved)
> >> (XEN)  00000000bcd2f000 - 00000000bce7f000 (ACPI NVS)
> >> (XEN)  00000000bce7f000 - 00000000bceff000 (ACPI data)
> >> (XEN)  00000000bceff000 - 00000000bfa00000 (reserved)
> >> (XEN)  00000000f8000000 - 00000000fc000000 (reserved)
> >> (XEN)  00000000fec00000 - 00000000fec01000 (reserved)
> >> (XEN)  00000000fed08000 - 00000000fed09000 (reserved)
> >> (XEN)  00000000fed10000 - 00000000fed18000 (reserved)
> >> (XEN)  00000000fed18000 - 00000000fed19000 (reserved)
> >> (XEN)  00000000fed19000 - 00000000fed1a000 (reserved)
> >> (XEN)  00000000fed1c000 - 00000000fed20000 (reserved)
> >> (XEN)  00000000fee00000 - 00000000fee01000 (reserved)
> >> (XEN)  00000000ffc00000 - 0000000100000000 (reserved)
> >> (XEN)  0000000100000000 - 000000043e600000 (reserved)
> >>
> >> having all those reserved regions above 2Gb is for the boot
> >> loader to behave oddly. Since Linux and Xen use different paths
> >> in the boot loader, one can't really draw conclusions from Linux
> >> getting to see a better memory map.
> >
> >Do you have any suggestions for how to check whether it really is the
> >bootloader?
> >
> >Leonardo, are you using grub2 or a different bootloader?
> >
> > -George
> 
> -- 
> Leonardo

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