[Xen-users] can't boot guests on Debian/Buster with 4.19.0-6-rt-amd64 and Xen 4.11

[Jean-Francois Malouin <Jean-Francois.Malouin@xxxxxxxxxxxxxxxxx>]

Hi,

On a stock Debian GNU/Linux 10 (buster) running kernel 4.19.0-6-rt-amd64 #1 SMP 
PREEMPT RT Debian 4.19.67-2+deb10u1 (2019-09-20)
with Xen 4.11...

I keep getting the errors below when trying to boot guests, related to 
xen_evtchn it seems.

They usually don't boot, even though sometimes they do but very rarely.  Can
someone shed some light? I've tried the next kernel available for Buster,
5.2.0-0.bpo.3-rt-amd64, but I get with exactly the same issues...

Thanks,
jf

--
xl info:

host                   : puck
release                : 4.19.0-6-rt-amd64
version                : #1 SMP PREEMPT RT Debian 4.19.67-2+deb10u1 (2019-09-20)
machine                : x86_64
nr_cpus                : 8
max_cpu_id             : 23
nr_nodes               : 2
cores_per_socket       : 4
threads_per_core       : 1
cpu_mhz                : 2000.091
hw_caps                : 
bfebfbff:009ce3bd:28100800:00000001:00000000:00000000:00000000:00000100
virt_caps              : hvm
total_memory           : 12279
free_memory            : 35
sharing_freed_memory   : 0
sharing_used_memory    : 0
outstanding_claims     : 0
free_cpus              : 0
xen_major              : 4
xen_minor              : 11
xen_extra              : .2-pre
xen_version            : 4.11.2-pre
xen_caps               : xen-3.0-x86_64 xen-3.0-x86_32p hvm-3.0-x86_32 
hvm-3.0-x86_32p hvm-3.0-x86_64 
xen_scheduler          : credit
xen_pagesize           : 4096
platform_params        : virt_start=0xffff800000000000
xen_changeset          : 
xen_commandline        : placeholder
cc_compiler            : gcc (Debian 8.3.0-7) 8.3.0
cc_compile_by          : pkg-xen-devel
cc_compile_domain      : lists.alioth.debian.org
cc_compile_date        : Mon Jun 24 10:10:11 UTC 2019
build_id               : a2c4043244b6d32b05873fcfae7635cd823bf0bb
xend_config_format     : 4




Nov  1 12:20:48 puck root: /etc/xen/scripts/block: add 
XENBUS_PATH=backend/vbd/6/51714
Nov  1 12:20:48 puck root: /etc/xen/scripts/block: add 
XENBUS_PATH=backend/vbd/6/51713
Nov  1 12:20:49 puck root: /etc/xen/scripts/block: Writing 
backend/vbd/6/51714/physical-device fd:4 to xenstore.
Nov  1 12:20:49 puck root: /etc/xen/scripts/block: Writing 
backend/vbd/6/51714/physical-device-path /dev/dm-4 to xenstore.
Nov  1 12:20:49 puck root: /etc/xen/scripts/block: Writing 
backend/vbd/6/51714/hotplug-status connected to xenstore.
Nov  1 12:20:50 puck root: /etc/xen/scripts/block: Writing 
backend/vbd/6/51713/physical-device fd:3 to xenstore.
Nov  1 12:20:50 puck root: /etc/xen/scripts/block: Writing 
backend/vbd/6/51713/physical-device-path /dev/dm-3 to xenstore.
Nov  1 12:20:50 puck root: /etc/xen/scripts/block: Writing 
backend/vbd/6/51713/hotplug-status connected to xenstore.
Nov  1 12:20:50 puck systemd-udevd[15181]: Using default interface naming 
scheme 'v240'.
Nov  1 12:20:50 puck systemd-udevd[15181]: link_config: autonegotiation is 
unset or enabled, the speed and duplex are not writable.
Nov  1 12:20:50 puck root: /etc/xen/scripts/vif-bridge: online type_if=vif 
XENBUS_PATH=backend/vif/6/0
Nov  1 12:20:50 puck kernel: [70698.477679] xenbr0: port 3(vif6.0) entered 
blocking state
Nov  1 12:20:50 puck kernel: [70698.477684] xenbr0: port 3(vif6.0) entered 
disabled state
Nov  1 12:20:50 puck kernel: [70698.477829] device vif6.0 entered promiscuous 
mode
Nov  1 12:20:50 puck kernel: [70698.485422] IPv6: ADDRCONF(NETDEV_UP): vif6.0: 
link is not ready
Nov  1 12:20:50 puck root: /etc/xen/scripts/vif-bridge: Successful vif-bridge 
online for vif6.0, bridge xenbr0.
Nov  1 12:20:50 puck root: /etc/xen/scripts/vif-bridge: Writing 
backend/vif/6/0/hotplug-status connected to xenstore.
Nov  1 12:20:53 puck kernel: [70700.870856] ------------[ cut here ]------------
Nov  1 12:20:53 puck kernel: [70700.870864] Interrupt for port 99, but 
apparently not enabled; per-user 00000000b68b6469
Nov  1 12:20:53 puck kernel: [70700.870912] WARNING: CPU: 0 PID: 15559 at 
drivers/xen/evtchn.c:167 evtchn_interrupt+0xc1/0xd0 [xen_evtchn]
Nov  1 12:20:53 puck kernel: [70700.870913] Modules linked in: xen_netback 
xen_blkback sctp rpcsec_gss_krb5 nfsv4 dns_resolver nfs fscache nft_l
imit xt_limit nft_counter xt_state xt_conntrack nf_conntrack nf_defrag_ipv6 
nf_defrag_ipv4 xt_tcpudp nft_compat nf_tables nfnetlink xen_gntdev x
en_evtchn xenfs xen_privcmd bridge stp llc snd_hda_intel mgag200 evdev 
intel_powerclamp snd_hda_codec ttm snd_hda_core ipmi_si ipmi_devintf snd_
hwdep serio_raw ipmi_msghandler pcspkr drm_kms_helper sg snd_pcm snd_timer 
iTCO_wdt iTCO_vendor_support drm snd i2c_algo_bit soundcore ioatdma b
utton i7core_edac i5500_temp dca nfsd drbd lru_cache auth_rpcgss nfs_acl dm_mod 
lockd parport_pc grace ppdev sunrpc lp parport ip_tables x_table
s autofs4 ext4 crc16 mbcache jbd2 fscrypto ecb crypto_simd cryptd glue_helper 
aes_x86_64 raid10 raid456 async_raid6_recov
Nov  1 12:20:53 puck kernel: [70700.870969]  async_memcpy async_pq async_xor 
async_tx xor raid6_pq libcrc32c crc32c_generic raid0 multipath line
ar raid1 md_mod sd_mod hid_generic usbhid hid ahci libahci uhci_hcd ehci_pci 
crc32c_intel psmouse ehci_hcd libata usbcore e1000e scsi_mod i2c_i8
01 lpc_ich usb_common
Nov  1 12:20:53 puck kernel: [70700.870994] CPU: 0 PID: 15559 Comm: 
irq/138-evtchn: Tainted: G        W         4.19.0-6-rt-amd64 #1 Debian 4.19
.67-2+deb10u1
Nov  1 12:20:53 puck kernel: [70700.870995] Hardware name: Supermicro 
X8DTL/X8DTL, BIOS 2.0c       01/05/11  
Nov  1 12:20:53 puck kernel: [70700.870999] RIP: 
e030:evtchn_interrupt+0xc1/0xd0 [xen_evtchn]
Nov  1 12:20:53 puck kernel: [70700.871001] Code: ba 01 00 00 00 be 1d 00 00 00 
48 8d bb e8 00 00 00 e8 73 eb d3 c0 eb b5 8b 76 20 48 89 da 48 c7 c7 e8 81 54 
c0 e8 d9 b2 b3 c0 <0f> 0b e9 55 ff ff ff 0f 1f 84 00 00 00 00 00 66 66 66 66 90 
41 57
Nov  1 12:20:53 puck kernel: [70700.871002] RSP: e02b:ffffc90046c77e80 EFLAGS: 
00010282
Nov  1 12:20:53 puck kernel: [70700.871004] RAX: 0000000000000000 RBX: 
ffff888322716700 RCX: 0000000000000000
Nov  1 12:20:53 puck kernel: [70700.871006] RDX: 0000000000000001 RSI: 
ffffffff81e8828b RDI: 00000000ffffffff
Nov  1 12:20:53 puck kernel: [70700.871014] RBP: ffff88832256f740 R08: 
0000000000000001 R09: 0000000000000000
Nov  1 12:20:53 puck kernel: [70700.871015] R10: 0000000000000004 R11: 
0000000000000000 R12: 000000000000008a
Nov  1 12:20:53 puck kernel: [70700.871017] R13: ffffffff810ef3c0 R14: 
ffff8881cb19fd20 R15: ffff888327ff1e00
Nov  1 12:20:53 puck kernel: [70700.871032] FS:  00007fd05ce0b700(0000) 
GS:ffff88832ee00000(0000) knlGS:0000000000000000
Nov  1 12:20:53 puck kernel: [70700.871034] CS:  e033 DS: 0000 ES: 0000 CR0: 
0000000080050033
Nov  1 12:20:53 puck kernel: [70700.871035] CR2: 0000560600680000 CR3: 
0000000306b04000 CR4: 0000000000000660
Nov  1 12:20:53 puck kernel: [70700.871042] Call Trace:
Nov  1 12:20:53 puck kernel: [70700.871059]  irq_forced_thread_fn+0x24/0x80
Nov  1 12:20:53 puck kernel: [70700.871062]  irq_thread+0xdd/0x180
Nov  1 12:20:53 puck kernel: [70700.871066]  ? wake_threads_waitq+0x30/0x30
Nov  1 12:20:53 puck kernel: [70700.871068]  ? 
irq_thread_check_affinity+0xc0/0xc0
Nov  1 12:20:53 puck kernel: [70700.871074]  kthread+0x112/0x130
Nov  1 12:20:53 puck kernel: [70700.871077]  ? 
kthread_create_worker_on_cpu+0x70/0x70
Nov  1 12:20:53 puck kernel: [70700.871083]  ret_from_fork+0x35/0x40
Nov  1 12:20:53 puck kernel: [70700.871087] ---[ end trace 000000000000001d ]---
Nov  1 12:20:53 puck kernel: [70700.871104] ------------[ cut here ]------------


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