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Re: [Xen-devel] PVH dom0 construction timeout
- To: xen-devel <xen-devel@xxxxxxxxxxxxxxxxxxxx>
- From: Andrew Cooper <andrew.cooper3@xxxxxxxxxx>
- Date: Mon, 2 Mar 2020 11:45:26 +0000
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- Cc: Jan Beulich <JBeulich@xxxxxxxx>, Wei Liu <wl@xxxxxxx>, Roger Pau Monne <roger.pau@xxxxxxxxxx>
- Delivery-date: Mon, 02 Mar 2020 11:45:39 +0000
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- List-id: Xen developer discussion <xen-devel.lists.xenproject.org>
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On 28/02/2020 21:08, Andrew Cooper wrote:
> It turns out that PVH dom0 construction doesn't work so well on a
> 2-socket Rome system...
With the softirq fix in place, here are the differences in construction
between PV and PVH along with timestamps.
(XEN) [ 30.856178] NX (Execute Disable) protection active
(XEN) [ 30.906155] *** Building a PV Dom0 ***
(XEN) [ 31.153853] ELF: phdr: paddr=0x1000000 memsz=0xeef000
(XEN) [ 27.588081] NX (Execute Disable) protection active
(XEN) [ 27.633081] *** Building a PVH Dom0 ***
(XEN) [ 33.524345] Dom0 memory allocation stats:
(XEN) [ 33.568697] order 0 allocations: 2
(XEN) [ 33.612341] order 1 allocations: 1
(XEN) [ 33.655544] order 2 allocations: 5
(XEN) [ 33.698344] order 3 allocations: 5
(XEN) [ 33.740650] order 4 allocations: 2
(XEN) [ 33.782736] order 5 allocations: 5
(XEN) [ 33.824295] order 6 allocations: 4
(XEN) [ 33.865423] order 7 allocations: 4
(XEN) [ 33.906237] order 8 allocations: 4
(XEN) [ 33.946560] order 9 allocations: 4
(XEN) [ 33.986465] order 10 allocations: 4
(XEN) [ 34.025925] order 11 allocations: 6
(XEN) [ 34.065089] order 12 allocations: 5
(XEN) [ 34.103750] order 13 allocations: 5
(XEN) [ 34.142221] order 14 allocations: 3
(XEN) [ 34.180064] order 15 allocations: 2
(XEN) [ 34.217557] order 16 allocations: 3
(XEN) [ 34.255105] order 17 allocations: 3
(XEN) [ 34.292610] order 18 allocations: 5
(XEN) [ 34.539002] Unable to copy initrd to guest
(XEN) [ 34.576732] Failed to load Dom0 kernel
(XEN) [ 34.618554]
(XEN) [ 34.656905] ****************************************
(XEN) [ 34.698851] Panic on CPU 0:
(XEN) [ 34.737640] Could not set up DOM0 guest OS
(XEN) [ 34.777939] ****************************************
i.e. PVH doesn't even complete correctly, and takes 6 seconds as opposed
to PV's 0.2s
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