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

[blallo@xxxxxxxxxx]

Konrad Rzeszutek Wilk:
> 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
Hi everybody,
I'm amazed at and grateful for your interest in my issue. It is an efi
system and the grub2 version is:

% grub-install -V
grub-install (GRUB) 2.02~beta3

The menu entry is obtained by the following script in /etc/grub.d/

/etc/grub.d/43_custom_xen

It's attached (largely mutuated by the one I use to boot the Arch Kernel
without Xen)

I do apologize for the top quoting in the preceding mail: I was on my
mobile.


Greetings

--
Leonardo

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