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Re: Cannot boot PVH dom0 with big initrd
- To: Marek Marczykowski-Górecki <marmarek@xxxxxxxxxxxxxxxxxxxxxx>
- From: Jan Beulich <jbeulich@xxxxxxxx>
- Date: Mon, 12 Oct 2026 10:32:47 +0200
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- Cc: xen-devel <xen-devel@xxxxxxxxxxxxxxxxxxxx>
- Delivery-date: Mon, 12 Oct 2026 08:34:28 +0000
- List-id: Xen developer discussion <xen-devel.lists.xenproject.org>
On 13.02.2026 05:02, Marek Marczykowski-Górecki wrote:
> After fixing the xhci crash, I hit another issue - booting with 236MB
> initrd doesn't work, I get:
>
> (XEN) [ 3.151856] *** Building a PVH Dom0 ***
> ...
> (XEN) [ 3.593940] Unable to allocate memory with order 0!
> (XEN) [ 3.597110] Failed to setup Dom0 physical memory map
> (XEN) [ 3.599884]
> (XEN) [ 3.602482] ****************************************
> (XEN) [ 3.605272] Panic on CPU 0:
> (XEN) [ 3.607928] Could not construct d0
> (XEN) [ 3.610692] ****************************************
> (XEN) [ 3.613463]
> (XEN) [ 3.616035] Reboot in five seconds...
> (XEN) [ 8.626565] Resetting with ACPI MEMORY or I/O RESET_REG.
>
> Full console log:
> https://gist.github.com/marmarek/c9dbc87bf07b76f2899781755762f565
>
> If I skip initrd, then it boots just fine (but dom0 is not happy about
> that). 164MB initrd failed too, but 13MB started ok.
> Just in case, I tried skipping XHCI console, but it didn't change
> anything.
You may want to give [1] a try, minimally up to patch 11 (patches 01
and 02 are unrelated, so could be omitted as well).
> Interestingly, this appear to have worked on Xen 4.19.3.
If so, then - judging from the changes which needed making - only out of
luck.
Jan
[1] https://lists.xen.org/archives/html/xen-devel/2026-10/msg00491.html
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