User domain starts with a crash loop when memory configured is above 500GB

["Robert Polasek" <polasekr@xxxxxxxxx>]

Hi everybody,

I have a server with 760GB of RAM. I have only domain 0 running there with 16GB of ram assigned to it.

Here is a configuration for my user domain:

name = "node01"

kernel = "/boot/vmlinuz-5.15.0-82-generic"

root = "/dev/xvda"

memory = 614400

maxmem = 614400

vcpus = 32

maxvcpus = 32

disk = ['file:/vserver/images/node01.img,xvda,w']

vif = ['bridge=virbr0,mac=00:16:3e:01:01:02']

iommu = "soft"

swiotlb = "force"

pci_permissive = 1

pci = ['0000:3e:00.0','0000:3f:00.0','0000:40:00.0','0000:41:00.0','0000:b1:00.0','0000:b2:00.0']

nics = 1

dhcp = "off"

ip = "192.168.122.15"

netmask = "255.255.255.0"

gateway = "192.168.122.1"

hostname = "node01"

extra="3"

When I try to start the domain, it spins in a crash loop with following error messages:

[ 6864.140170] WARNING: CPU: 2 PID: 266 at arch/x86/xen/multicalls.c:102 xen_mc_flush+0x197/0x200

[ 6864.140183] Modules linked in:

[ 6864.140190] CPU: 2 PID: 266 Comm: xen-balloon Tainted: G      D W         5.15.0-82-generic #91-Ubuntu

[ 6864.140203] RIP: e030:xen_mc_flush+0x197/0x200

[ 6864.140212] Code: 77 65 89 c0 48 c1 e0 05 48 05 00 20 00 81 ff d0 0f 1f 00 49 89 45 18 48 85 c0 0f 89 17 ff ff ff 45 8b 4d 00 41 bf 01 00 00 00 <0f> 0b 48 c7 c7 f0 8e 5b 82 44 89 ca 44 89 fe 45 31 f6 65 8b 0d e8

[ 6864.140234] RSP: e02b:ffffc90041027b88 EFLAGS: 00010002

[ 6864.140243] RAX: 0000000000000001 RBX: 0000000000000040 RCX: 0000000000000000

[ 6864.140253] RDX: 0000000000000000 RSI: 0000000000000002 RDI: ffff89009809e310

[ 6864.140264] RBP: ffffc90041027bb8 R08: ffff888168dc0000 R09: 0000000000000002

[ 6864.140275] R10: 0000000000000200 R11: ffff8900980b7690 R12: 0000000000000000

[ 6864.140286] R13: ffff89009809e300 R14: 0000000000000002 R15: 0000000000000001

[ 6864.140303] FS:  0000000000000000(0000) GS:ffff890098080000(0000) knlGS:0000000000000000

[ 6864.140315] CS:  10000e030 DS: 0000 ES: 0000 CR0: 0000000080050033

[ 6864.140324] CR2: 0000000000000000 CR3: 0000000002e10000 CR4: 0000000000050660

[ 6864.140339] Call Trace:

[ 6864.140344]  <TASK>

[ 6864.140349]  ? __raw_callee_save_xen_make_pte+0x15/0x27

[ 6864.140359]  xen_mc_issue+0x61/0x80

[ 6864.140367]  xen_alloc_pte+0xd8/0x290

[ 6864.140376]  pmd_populate_kernel.constprop.0+0x4b/0xa0

[ 6864.140387]  vmemmap_pmd_populate+0x69/0x79

[ 6864.140395]  vmemmap_populate_basepages+0x68/0xb3

[ 6864.140405]  vmemmap_populate+0x2a/0xa9

[ 6864.140412]  __populate_section_memmap+0x3c/0x57

[ 6864.140422]  sparse_add_section+0x12b/0x1dc

[ 6864.140431]  __add_pages+0xac/0x150

[ 6864.140440]  add_pages+0x17/0x70

[ 6864.140447]  arch_add_memory+0x45/0x60

[ 6864.140455]  add_memory_resource+0x12c/0x320

[ 6864.140467]  reserve_additional_memory+0x10f/0x160

[ 6864.140476]  balloon_thread+0x337/0x500

[ 6864.140483]  ? wait_woken+0x70/0x70

[ 6864.140492]  ? reserve_additional_memory+0x160/0x160

[ 6864.140501]  kthread+0x127/0x150

[ 6864.140509]  ? set_kthread_struct+0x50/0x50

[ 6864.140518]  ret_from_fork+0x1f/0x30

[ 6864.140528]  </TASK>

[ 6864.140533] ---[ end trace 3bca9737718a46b2 ]---

[ 6864.140541] 1 of 2 multicall(s) failed: cpu 2

[ 6864.140549]   call  2: op=26 arg=[ffff89009809eb10] result=-22

Any suggestion what I am doing wrong? There should be plenty of RAM to start 600GB domain. I can start  user domain with 500GB no problem. Thank you in advance for your help and suggestions.

# xl info | grep  memory  

total_memory           : 785055

free_memory            : 143839