Re: [Xen-users] VM won't boot: can't allocate low memory for domain: Out of memory

[Sarah Newman <srn@xxxxxxxxx>]

On 2/11/20 6:58 AM, Ezio Ostorero wrote:
>    Hi All,
>
>    I updated my Xen host to Debian buster, and my guests refuse to boot.
>
>    OS and Xen versions are:
> # lsb_release -a
> No LSB modules are available.
> Distributor ID: Debian
> Description: Debian GNU/Linux 10 (buster)
> Release: 10
> Codename: buster
>
>    Xen 4.11.4-pre
>
>    The error reported at guest VM creation is as follows:
>
> xc: error: panic: xc_dom_boot.c:122: xc_dom_boot_mem_init: can't allocate
> low memory for domain: Out of memory
>
> libxl: error: libxl_dom.c:737:libxl__build_dom: xc_dom_boot_mem_init
> failed: Cannot allocate memory
>   libxl: error: libxl_create.c:1267:domcreate_rebuild_done: Domain 2:cannot
> (re-)build domain: -3
>
>
>     I did my share of googling and found nothing significant, at least not
> besides the following configurations I did for earlier Xen versions:
>    1) This entry in grub.cfg:
> multiboot /boot/xen-4.11-amd64.gz placeholder  dom0_mem=1024M,max:1024M
> ${xen_rm_opts}
>
>    2) This entry in /etc/default/grub.d/xen.cfg
> GRUB_CMDLINE_XEN_DEFAULT="dom0_mem=1024M,max:1024M"
>
>    Any suggestions? Checks? I'm out of ideas.
>    Thank you for your attention,
What does xl info -n say?

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