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Adi Pircalabu

2017-Dec-12 00:52 UTC

[CentOS-virt] Xen PV DomU running Kernel 4.14.5-1.el7.elrepo.x86_64: xl -v vcpu-set <domU> <val> triggers domU kernel WARNING, then domU becomes unresponsive

Has anyone seen this recently? I couldn't replicate it on:
- CentOS 6 running kernel-2.6.32-696.16.1.el6.x86_64, 
kernel-lt-4.4.105-1.el6.elrepo.x86_64
- CentOS 7 running 4.9.67-1.el7.centos.x86_64

But I can replicate it consistently running "xl -v vcpu-set <domU> 
<val>" on:
- CentOS 6 running 4.14.5-1.el6.elrepo.x86_64
- CentOS 7 running 4.14.5-1.el7.elrepo.x86_64

dom0 versions tested with similar results in the domU:
- 4.6.6-6.el7 on kernel 4.9.63-29.el7.x86_64
- 4.6.3-15.el6 on kernel 4.9.37-29.el6.x86_64

Noticed behaviour:
- These commands stall:
top
ls -l /var/tmp
ls -l /tmp
- Stuck in D state on the CentOS 7 domU:
root         5  0.0  0.0      0     0 ?        D    11:20   0:00 
[kworker/u8:0]
root       316  0.0  0.0      0     0 ?        D    11:20   0:00 
[jbd2/xvda1-8]
root      1145  0.0  0.2 116636  4776 ?        Ds   11:20   0:00 -bash
root      1289  0.0  0.1  25852  2420 ?        Ds   11:35   0:00 
/usr/bin/systemd-tmpfiles --clean
root      1290  0.0  0.1 125248  2696 pts/1    D+   11:44   0:00 ls 
--color=auto -l /tmp/
root      1293  0.0  0.1 125248  2568 pts/2    D+   11:44   0:00 ls 
--color=auto -l /var/tmp
root      1296  0.0  0.2 116636  4908 pts/3    Ds+  11:44   0:00 -bash
root      1358  0.0  0.1 125248  2612 pts/4    D+   11:47   0:00 ls 
--color=auto -l /var/tmp

At a first glance it appears the issue is in 4.14.5 kernel. Stack traces 
follow:

-----CentOS 6 kernel-ml-4.14.5-1.el6.elrepo.x86_64 start here-----
------------[ cut here ]------------
WARNING: CPU: 4 PID: 60 at block/blk-mq.c:1144 
__blk_mq_run_hw_queue+0x9e/0xc0
Modules linked in: intel_cstate(-) ipt_REJECT nf_reject_ipv4 
nf_conntrack_ipv4 nf_defrag_ipv4 xt_multiport iptable_filter ip_tables 
ip6t_REJECT nf_reject_ipv6 nf_conntrack_ipv6 nf_defrag_ipv6 xt_state 
nf_conntrack libcrc32c ip6table_filter ip6_tables dm_mod dax 
xen_netfront crc32_pclmul crct10dif_pclmul ghash_clmulni_intel 
crc32c_intel pcbc aesni_intel glue_helper crypto_simd cryptd aes_x86_64 
coretemp hwmon x86_pkg_temp_thermal sb_edac intel_rapl_perf pcspkr ext4 
jbd2 mbcache xen_blkfront
CPU: 4 PID: 60 Comm: kworker/4:1H Not tainted 4.14.5-1.el6.elrepo.x86_64 
#1
Workqueue: kblockd blk_mq_run_work_fn
task: ffff8802711a2780 task.stack: ffffc90041af4000
RIP: e030:__blk_mq_run_hw_queue+0x9e/0xc0
RSP: e02b:ffffc90041af7c48 EFLAGS: 00010202
RAX: 0000000000000001 RBX: ffff88027117fa80 RCX: 0000000000000001
RDX: ffff88026b053ee0 RSI: ffff88027351bca0 RDI: ffff88026b072800
RBP: ffffc90041af7c68 R08: ffffc90041af7eb8 R09: ffff8802711a2810
R10: 0000000000007ff0 R11: 0000000000000001 R12: ffff88026b072800
R13: ffffe8ffffd04d00 R14: 0000000000000000 R15: ffffe8ffffd04d05
FS:  00002b7b7c89b700(0000) GS:ffff880273500000(0000) 
knlGS:0000000000000000
CS:  e033 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: ffffffffff600400 CR3: 000000026d953000 CR4: 0000000000042660
Call Trace:
  blk_mq_run_work_fn+0x31/0x40
  process_one_work+0x174/0x440
  ? xen_mc_flush+0xad/0x1b0
  ? schedule+0x3a/0xa0
  worker_thread+0x6b/0x410
  ? default_wake_function+0x12/0x20
  ? __wake_up_common+0x84/0x130
  ? maybe_create_worker+0x120/0x120
  ? schedule+0x3a/0xa0
  ? _raw_spin_unlock_irqrestore+0x16/0x20
  ? maybe_create_worker+0x120/0x120
  kthread+0x111/0x150
  ? __kthread_init_worker+0x40/0x40
  ret_from_fork+0x25/0x30
Code: 89 df e8 06 2f d9 ff 4c 89 e7 41 89 c5 e8 0b 6e 00 00 44 89 ee 48 
89 df e8 20 2f d9 ff 48 8b 5d e8 4c 8b 65 f0 4c 8b 6d f8 c9 c3 <0f> ff 
eb aa 4c 89 e7 e8 e6 6d 00 00 48 8b 5d e8 4c 8b 65 f0 4c
---[ end trace fe2aaf4e723042fd ]---
-----CentOS 6 kernel-ml-4.14.5-1.el6.elrepo.x86_64 end here-----

-----CentOS 7 kernel-ml-4.14.5-1.el7.elrepo.x86_64 start here-----
[  116.528885] ------------[ cut here ]------------
[  116.528894] WARNING: CPU: 3 PID: 38 at block/blk-mq.c:1144 
__blk_mq_run_hw_queue+0x89/0xa0
[  116.528898] Modules linked in: intel_cstate(-) ip_set_hash_ip ip_set 
nfnetlink x86_pkg_temp_thermal coretemp crct10dif_pclmul crc32_pclmul 
ghash_clmulni_intel pcbc aesni_intel crypto_simd glue_helper cryptd 
intel_rapl_perf pcspkr nfsd auth_rpcgss nfs_acl lockd grace sunrpc 
ip_tables ext4 mbcache jbd2 xen_netfront xen_blkfront crc32c_intel
[  116.528919] CPU: 3 PID: 38 Comm: kworker/3:1H Not tainted 
4.14.5-1.el7.elrepo.x86_64 #1
[  116.529007] Code: 00 e8 7c c5 45 00 4c 89 e7 e8 14 4b d7 ff 48 89 df 
41 89 c5 e8 19 66 00 00 44 89 ee 4c 89 e7 e8 2e 4b d7 ff 5b 41 5c 41 5d 
5d c3 <0f> ff eb b4 48 89 df e8 fb 65 00 00 5b 41 5c 41 5d 5d c3 0f ff
[  116.529034] ---[ end trace a7814e3ec9a330c6 ]---
[  147.424117] ------------[ cut here ]------------
[  147.424150] WARNING: CPU: 2 PID: 24 at block/blk-mq.c:1144 
__blk_mq_run_hw_queue+0x89/0xa0
[  147.424160] Modules linked in: ip_set_hash_ip ip_set nfnetlink 
x86_pkg_temp_thermal coretemp crct10dif_pclmul crc32_pclmul 
ghash_clmulni_intel pcbc aesni_intel crypto_simd glue_helper cryptd 
intel_rapl_perf pcspkr nfsd auth_rpcgss nfs_acl lockd grace sunrpc 
ip_tables ext4 mbcache jbd2 xen_netfront xen_blkfront crc32c_intel
[  147.424222] CPU: 2 PID: 24 Comm: kworker/2:0H Tainted: G        W     
   4.14.5-1.el7.elrepo.x86_64 #1
[  147.424238] Workqueue: kblockd blk_mq_run_work_fn
[  147.424247] task: ffff88007c539840 task.stack: ffffc900403e4000
[  147.424259] RIP: e030:__blk_mq_run_hw_queue+0x89/0xa0
[  147.424270] RSP: e02b:ffffc900403e7e30 EFLAGS: 00010202
[  147.424279] RAX: 0000000000000001 RBX: ffff880003b83800 RCX: 
ffff88007d11bca0
[  147.424288] RDX: ffff88007c656c88 RSI: 00000000000000a0 RDI: 
ffff880003b83800
[  147.424298] RBP: ffffc900403e7e48 R08: 0000000000000000 R09: 
0000000000000000
[  147.424309] R10: 0000000000007ff0 R11: 00000000000074e5 R12: 
ffff88007c436900
[  147.424319] R13: ffff88007d11bc80 R14: ffff88007d121b00 R15: 
ffff880003b83848
[  147.424340] FS:  0000000000000000(0000) GS:ffff88007d100000(0000) 
knlGS:ffff88007d100000
[  147.424350] CS:  e033 DS: 0000 ES: 0000 CR0: 0000000080050033
[  147.424359] CR2: 00007f504f19a700 CR3: 0000000079bed000 CR4: 
0000000000042660
[  147.424370] Call Trace:
[  147.424384]  blk_mq_run_work_fn+0x2c/0x30
[  147.424400]  process_one_work+0x149/0x360
[  147.424411]  worker_thread+0x4d/0x3e0
[  147.424421]  kthread+0x109/0x140
[  147.424432]  ? rescuer_thread+0x380/0x380
[  147.424441]  ? kthread_park+0x60/0x60
[  147.424455]  ret_from_fork+0x25/0x30
[  147.424463] Code: 00 e8 7c c5 45 00 4c 89 e7 e8 14 4b d7 ff 48 89 df 
41 89 c5 e8 19 66 00 00 44 89 ee 4c 89 e7 e8 2e 4b d7 ff 5b 41 5c 41 5d 
5d c3 <0f> ff eb b4 48 89 df e8 fb 65 00 00 5b 41 5c 41 5d 5d c3 0f ff
[  147.424554] ---[ end trace a7814e3ec9a330c7 ]---
-----CentOS 7 kernel-ml-4.14.5-1.el7.elrepo.x86_64 end here-----

-- 
Adi Pircalabu

Akemi Yagi

2017-Dec-14 17:10 UTC

head link

[CentOS-virt] Xen PV DomU running Kernel 4.14.5-1.el7.elrepo.x86_64: xl -v vcpu-set <domU> <val> triggers domU kernel WARNING, then domU becomes unresponsive

On Mon, Dec 11, 2017 at 4:52 PM, Adi Pircalabu <adi at ddns.com.au> wrote:
> Has anyone seen this recently? I couldn't replicate it on:
> - CentOS 6 running kernel-2.6.32-696.16.1.el6.x86_64,
> kernel-lt-4.4.105-1.el6.elrepo.x86_64
> - CentOS 7 running 4.9.67-1.el7.centos.x86_64
>
> But I can replicate it consistently running "xl -v vcpu-set
<domU> <val>"
> on:
> - CentOS 6 running 4.14.5-1.el6.elrepo.x86_64
> - CentOS 7 running 4.14.5-1.el7.elrepo.x86_64
>
> dom0 versions tested with similar results in the domU:
> - 4.6.6-6.el7 on kernel 4.9.63-29.el7.x86_64
> - 4.6.3-15.el6 on kernel 4.9.37-29.el6.x86_64
>
> Noticed behaviour:
> - These commands stall:
> top
> ls -l /var/tmp
> ls -l /tmp
> - Stuck in D state on the CentOS 7 domU:
> root         5  0.0  0.0      0     0 ?        D    11:20   0:00
> [kworker/u8:0]
> root       316  0.0  0.0      0     0 ?        D    11:20   0:00
> [jbd2/xvda1-8]
> root      1145  0.0  0.2 116636  4776 ?        Ds   11:20   0:00 -bash
> root      1289  0.0  0.1  25852  2420 ?        Ds   11:35   0:00
> /usr/bin/systemd-tmpfiles --clean
> root      1290  0.0  0.1 125248  2696 pts/1    D+   11:44   0:00 ls
> --color=auto -l /tmp/
> root      1293  0.0  0.1 125248  2568 pts/2    D+   11:44   0:00 ls
> --color=auto -l /var/tmp
> root      1296  0.0  0.2 116636  4908 pts/3    Ds+  11:44   0:00 -bash
> root      1358  0.0  0.1 125248  2612 pts/4    D+   11:47   0:00 ls
> --color=auto -l /var/tmp
>
> At a first glance it appears the issue is in 4.14.5 kernel. Stack traces
> follow:
>
> Adi Pircalabu

Can you test-install 4.15-rcX?

 to see if the problem persists in the latest kernel?:

?http://elrepo.org/people/ajb/devel/kernel-ml/el7/x86_64/RPMS/

Akemi
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Adi Pircalabu

2017-Dec-14 22:01 UTC

head link

[CentOS-virt] Xen PV DomU running Kernel 4.14.5-1.el7.elrepo.x86_64: xl -v vcpu-set <domU> <val> triggers domU kernel WARNING, then domU becomes unresponsive

On 15-12-2017 4:10, Akemi Yagi wrote:> On Mon, Dec 11, 2017 at 4:52 PM, Adi Pircalabu <adi at ddns.com.au>
> wrote:
> 
>> Has anyone seen this recently? I couldn't replicate it on:
>> - CentOS 6 running kernel-2.6.32-696.16.1.el6.x86_64,
>> kernel-lt-4.4.105-1.el6.elrepo.x86_64
>> - CentOS 7 running 4.9.67-1.el7.centos.x86_64
>> 
>> But I can replicate it consistently running "xl -v vcpu-set
<domU>
>> <val>" on:
>> - CentOS 6 running 4.14.5-1.el6.elrepo.x86_64
>> - CentOS 7 running 4.14.5-1.el7.elrepo.x86_64
>> 
>> dom0 versions tested with similar results in the domU:
>> - 4.6.6-6.el7 on kernel 4.9.63-29.el7.x86_64
>> - 4.6.3-15.el6 on kernel 4.9.37-29.el6.x86_64
>> 
>> Noticed behaviour:
>> - These commands stall:
>> top
>> ls -l /var/tmp
>> ls -l /tmp
>> - Stuck in D state on the CentOS 7 domU:
>> root         5  0.0  0.0      0     0 ?        D    11:20   0:00
>> [kworker/u8:0]
>> root       316  0.0  0.0      0     0 ?        D    11:20   0:00
>> [jbd2/xvda1-8]
>> root      1145  0.0  0.2 116636  4776 ?        Ds   11:20   0:00
>> -bash
>> root      1289  0.0  0.1  25852  2420 ?        Ds   11:35   0:00
>> /usr/bin/systemd-tmpfiles --clean
>> root      1290  0.0  0.1 125248  2696 pts/1    D+   11:44   0:00 ls
>> --color=auto -l /tmp/
>> root      1293  0.0  0.1 125248  2568 pts/2    D+   11:44   0:00 ls
>> --color=auto -l /var/tmp
>> root      1296  0.0  0.2 116636  4908 pts/3    Ds+  11:44   0:00
>> -bash
>> root      1358  0.0  0.1 125248  2612 pts/4    D+   11:47   0:00 ls
>> --color=auto -l /var/tmp
>> 
>> At a first glance it appears the issue is in 4.14.5 kernel. Stack
>> traces follow:
>> 
>> Adi Pircalabu
> 
> Can you test-install 4.15-rcX?
>  to see if the problem persists in the latest kernel?:
> 
> ?http://elrepo.org/people/ajb/devel/kernel-ml/el7/x86_64/RPMS/ [1]
> 
> Akemi
Thanks for that, tested it on both CentOS 6 and 7 PV domU and I get 
similar panics:

-----CentOS 6-----
[...]
dracut: Switching root
		Welcome to CentOS
Starting udev: udev: starting version 147
input: PC Speaker as /devices/platform/pcspkr/input/input0
xen_netfront: Initialising Xen virtual ethernet driver
BUG: unable to handle kernel NULL pointer dereference at 
0000000000000010
IP: coretemp_cpu_online+0x116/0x190 [coretemp]
PGD 7b5c7067 P4D 7b5c7067 PUD 7b5cd067 PMD 0
Oops: 0002 [#1] SMP
Modules linked in: coretemp(+) hwmon xen_netfront pcspkr ext4 jbd2 
mbcache xen_blkfront dm_mirror dm_region_hash dm_log dm_mod dax
CPU: 0 PID: 12 Comm: cpuhp/0 Not tainted 4.15.0-0.rc1.el6.elrepo.x86_64 
#1
task: ffff88007c8f43c0 task.stack: ffffc90040390000
RIP: e030:coretemp_cpu_online+0x116/0x190 [coretemp]
RSP: e02b:ffffc90040393cd8 EFLAGS: 00010246
RAX: 0000000000000010 RBX: 0000000000000000 RCX: ffff88007c87c248
RDX: 0000000000000000 RSI: ffff880077720c28 RDI: ffff8800069ea020
RBP: ffffc90040393d18 R08: 0000000000000000 R09: ffffc90040393a08
R10: 0000000000000000 R11: 000000000000005f R12: 0000000000000000
R13: ffff8800069ea000 R14: ffff88007f60a040 R15: 0000000000000000
FS:  00007f685ca0a700(0000) GS:ffff88007f600000(0000) 
knlGS:0000000000000000
CS:  e033 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000000010 CR3: 000000000683a000 CR4: 0000000000042660
Call Trace:
  ? coretemp_add_core+0x50/0x50 [coretemp]
  cpuhp_invoke_callback+0xe9/0x700
  ? put_prev_task_fair+0x26/0x40
  ? __schedule+0x2d0/0x6e0
  ? __wake_up_common+0x84/0x130
  ? __wake_up_common+0x84/0x130
  cpuhp_thread_fun+0xee/0x170
  smpboot_thread_fn+0x10c/0x160
  ? smpboot_create_threads+0x80/0x80
  kthread+0x10a/0x140
  ? kthread_probe_data+0x40/0x40
  ret_from_fork+0x1f/0x30
Code: 11 15 41 e1 49 89 c5 b8 f4 ff ff ff 4d 85 ed 0f 84 66 ff ff ff 4c 
89 ef e8 88 11 41 e1 85 c0 75 6e 48 8b 05 75 17 00 00 4d 63 ff <4e> 89 
2c f8 49 81 fd 00 f0 ff ff 44 89 e8 0f 87 3c ff ff ff 49
RIP: coretemp_cpu_online+0x116/0x190 [coretemp] RSP: ffffc90040393cd8
CR2: 0000000000000010
---[ end trace 8253bafacf228cf2 ]---
-----CentOS 6-----
-----CentOS 7-----
[...]
[  OK  ] Found device /dev/xvda2.
          Activating swap /dev/xvda2...
[    4.998940] alg: No test for pcbc(aes) (pcbc-aes-aesni)
[    5.001054] Adding 1048572k swap on /dev/xvda2.  Priority:-2 
extents:1 across:1048572k SSFS
[  OK  ] Activated swap /dev/xvda2.
[  OK  ] Reached target Swap.
[    5.020760] BUG: unable to handle kernel NULL pointer dereference at 
0000000000000010
[    5.020767] IP: coretemp_cpu_online+0xf8/0x1f7 [coretemp]
[    5.020769] PGD 0 P4D 0
[    5.020771] Oops: 0002 [#1] SMP
[    5.020773] Modules linked in: coretemp(+) crct10dif_pclmul 
crc32_pclmul ghash_clmulni_intel pcbc aesni_intel crypto_simd 
glue_helper cryptd pcspkr intel_rapl_perf nfsd auth_rpcgss nfs_acl lockd 
grace sunrpc ip_tables ext4 mbcache jbd2 xen_netfront xen_blkfront 
crc32c_intel
[    5.020786] CPU: 0 PID: 12 Comm: cpuhp/0 Not tainted 
4.15.0-0.rc3.el7.elrepo.x86_64 #1
[    5.020789] RIP: e030:coretemp_cpu_online+0xf8/0x1f7 [coretemp]
[    5.020790] RSP: e02b:ffffc90040387e10 EFLAGS: 00010246
[    5.020793] RAX: 0000000000000010 RBX: ffff8800040d8800 RCX: 
0000000000000000
[    5.020794] RDX: ffff880079761e70 RSI: ffff88007c438cc8 RDI: 
ffff8800040d8820
[    5.020796] RBP: ffffc90040387e40 R08: 0000000000000000 R09: 
ffffffff81f8aff0
[    5.020798] R10: ffff88007d01f400 R11: 0000000000000000 R12: 
0000000000000000
[    5.020800] R13: 0000000000000000 R14: 0000000000000000 R15: 
ffff88007d00a020
[    5.020804] FS:  0000000000000000(0000) GS:ffff88007d000000(0000) 
knlGS:0000000000000000
[    5.020806] CS:  e033 DS: 0000 ES: 0000 CR0: 0000000080050033
[    5.020808] CR2: 0000000000000010 CR3: 0000000004731000 CR4: 
0000000000042660
[    5.020810] Call Trace:
[    5.020814]  ? create_core_data+0x5f0/0x5f0 [coretemp]
[    5.020817]  cpuhp_invoke_callback+0xae/0x5c0
[    5.020820]  ? __schedule+0x295/0x880
[    5.020823]  cpuhp_thread_fun+0xce/0x170
[    5.020825]  smpboot_thread_fn+0x110/0x160
[    5.020827]  kthread+0x102/0x140
[    5.020828]  ? sort_range+0x30/0x30
[    5.020831]  ? kthread_associate_blkcg+0xa0/0xa0
[    5.020833]  ret_from_fork+0x1f/0x30
[    5.020834] Code: 21 a0 41 0f b7 f6 e8 38 73 30 e1 48 89 c3 b8 f4 ff 
ff ff 48 85 db 74 c0 48 89 df e8 d3 69 30 e1 85 c0 75 7c 48 8b 05 40 18 
00 00 <4a> 89 1c f0 48 81 fb 00 f0 ff ff 0f 87 e7 00 00 00 49 8b 47 4c
[    5.020852] RIP: coretemp_cpu_online+0xf8/0x1f7 [coretemp] RSP: 
ffffc90040387e10
[    5.020854] CR2: 0000000000000010
[    5.020856] ---[ end trace 9ce91afe6b362317 ]---
[    5.020858] Kernel panic - not syncing: Fatal exception
[    5.020861] Kernel Offset: disabled
-----CentOS 7-----

For CentOS 7 I've also tried booting it using vcpus = 1 and no maxvcpus 
with the same outcome. Looks like 4.15-rc is a no go for me :)

Cheers,

---
Adi Pircalabu

George Dunlap

2017-Dec-18 11:02 UTC

head link

[CentOS-virt] Xen PV DomU running Kernel 4.14.5-1.el7.elrepo.x86_64: xl -v vcpu-set <domU> <val> triggers domU kernel WARNING, then domU becomes unresponsive

Adi,

Thanks for your detailed report -- would you mind reposting this to
xen-devel at lists.xenproject.org?  This looks like a general Xen / Linux
bug (not specific to the Virt SIG packages), and there are a lot more
eyeballs there.

Thanks,
 -George


On Tue, Dec 12, 2017 at 12:52 AM, Adi Pircalabu <adi at ddns.com.au>
wrote:> Has anyone seen this recently? I couldn't replicate it on:
> - CentOS 6 running kernel-2.6.32-696.16.1.el6.x86_64,
> kernel-lt-4.4.105-1.el6.elrepo.x86_64
> - CentOS 7 running 4.9.67-1.el7.centos.x86_64
>
> But I can replicate it consistently running "xl -v vcpu-set
<domU> <val>"
> on:
> - CentOS 6 running 4.14.5-1.el6.elrepo.x86_64
> - CentOS 7 running 4.14.5-1.el7.elrepo.x86_64
>
> dom0 versions tested with similar results in the domU:
> - 4.6.6-6.el7 on kernel 4.9.63-29.el7.x86_64
> - 4.6.3-15.el6 on kernel 4.9.37-29.el6.x86_64
>
> Noticed behaviour:
> - These commands stall:
> top
> ls -l /var/tmp
> ls -l /tmp
> - Stuck in D state on the CentOS 7 domU:
> root         5  0.0  0.0      0     0 ?        D    11:20   0:00
> [kworker/u8:0]
> root       316  0.0  0.0      0     0 ?        D    11:20   0:00
> [jbd2/xvda1-8]
> root      1145  0.0  0.2 116636  4776 ?        Ds   11:20   0:00 -bash
> root      1289  0.0  0.1  25852  2420 ?        Ds   11:35   0:00
> /usr/bin/systemd-tmpfiles --clean
> root      1290  0.0  0.1 125248  2696 pts/1    D+   11:44   0:00 ls
> --color=auto -l /tmp/
> root      1293  0.0  0.1 125248  2568 pts/2    D+   11:44   0:00 ls
> --color=auto -l /var/tmp
> root      1296  0.0  0.2 116636  4908 pts/3    Ds+  11:44   0:00 -bash
> root      1358  0.0  0.1 125248  2612 pts/4    D+   11:47   0:00 ls
> --color=auto -l /var/tmp
>
> At a first glance it appears the issue is in 4.14.5 kernel. Stack traces
> follow:
>
> -----CentOS 6 kernel-ml-4.14.5-1.el6.elrepo.x86_64 start here-----
> ------------[ cut here ]------------
> WARNING: CPU: 4 PID: 60 at block/blk-mq.c:1144
> __blk_mq_run_hw_queue+0x9e/0xc0
> Modules linked in: intel_cstate(-) ipt_REJECT nf_reject_ipv4
> nf_conntrack_ipv4 nf_defrag_ipv4 xt_multiport iptable_filter ip_tables
> ip6t_REJECT nf_reject_ipv6 nf_conntrack_ipv6 nf_defrag_ipv6 xt_state
> nf_conntrack libcrc32c ip6table_filter ip6_tables dm_mod dax xen_netfront
> crc32_pclmul crct10dif_pclmul ghash_clmulni_intel crc32c_intel pcbc
> aesni_intel glue_helper crypto_simd cryptd aes_x86_64 coretemp hwmon
> x86_pkg_temp_thermal sb_edac intel_rapl_perf pcspkr ext4 jbd2 mbcache
> xen_blkfront
> CPU: 4 PID: 60 Comm: kworker/4:1H Not tainted 4.14.5-1.el6.elrepo.x86_64 #1
> Workqueue: kblockd blk_mq_run_work_fn
> task: ffff8802711a2780 task.stack: ffffc90041af4000
> RIP: e030:__blk_mq_run_hw_queue+0x9e/0xc0
> RSP: e02b:ffffc90041af7c48 EFLAGS: 00010202
> RAX: 0000000000000001 RBX: ffff88027117fa80 RCX: 0000000000000001
> RDX: ffff88026b053ee0 RSI: ffff88027351bca0 RDI: ffff88026b072800
> RBP: ffffc90041af7c68 R08: ffffc90041af7eb8 R09: ffff8802711a2810
> R10: 0000000000007ff0 R11: 0000000000000001 R12: ffff88026b072800
> R13: ffffe8ffffd04d00 R14: 0000000000000000 R15: ffffe8ffffd04d05
> FS:  00002b7b7c89b700(0000) GS:ffff880273500000(0000)
knlGS:0000000000000000
> CS:  e033 DS: 0000 ES: 0000 CR0: 0000000080050033
> CR2: ffffffffff600400 CR3: 000000026d953000 CR4: 0000000000042660
> Call Trace:
>  blk_mq_run_work_fn+0x31/0x40
>  process_one_work+0x174/0x440
>  ? xen_mc_flush+0xad/0x1b0
>  ? schedule+0x3a/0xa0
>  worker_thread+0x6b/0x410
>  ? default_wake_function+0x12/0x20
>  ? __wake_up_common+0x84/0x130
>  ? maybe_create_worker+0x120/0x120
>  ? schedule+0x3a/0xa0
>  ? _raw_spin_unlock_irqrestore+0x16/0x20
>  ? maybe_create_worker+0x120/0x120
>  kthread+0x111/0x150
>  ? __kthread_init_worker+0x40/0x40
>  ret_from_fork+0x25/0x30
> Code: 89 df e8 06 2f d9 ff 4c 89 e7 41 89 c5 e8 0b 6e 00 00 44 89 ee 48 89
> df e8 20 2f d9 ff 48 8b 5d e8 4c 8b 65 f0 4c 8b 6d f8 c9 c3 <0f> ff
eb aa 4c
> 89 e7 e8 e6 6d 00 00 48 8b 5d e8 4c 8b 65 f0 4c
> ---[ end trace fe2aaf4e723042fd ]---
> -----CentOS 6 kernel-ml-4.14.5-1.el6.elrepo.x86_64 end here-----
>
> -----CentOS 7 kernel-ml-4.14.5-1.el7.elrepo.x86_64 start here-----
> [  116.528885] ------------[ cut here ]------------
> [  116.528894] WARNING: CPU: 3 PID: 38 at block/blk-mq.c:1144
> __blk_mq_run_hw_queue+0x89/0xa0
> [  116.528898] Modules linked in: intel_cstate(-) ip_set_hash_ip ip_set
> nfnetlink x86_pkg_temp_thermal coretemp crct10dif_pclmul crc32_pclmul
> ghash_clmulni_intel pcbc aesni_intel crypto_simd glue_helper cryptd
> intel_rapl_perf pcspkr nfsd auth_rpcgss nfs_acl lockd grace sunrpc
ip_tables
> ext4 mbcache jbd2 xen_netfront xen_blkfront crc32c_intel
> [  116.528919] CPU: 3 PID: 38 Comm: kworker/3:1H Not tainted
> 4.14.5-1.el7.elrepo.x86_64 #1
> [  116.529007] Code: 00 e8 7c c5 45 00 4c 89 e7 e8 14 4b d7 ff 48 89 df 41
> 89 c5 e8 19 66 00 00 44 89 ee 4c 89 e7 e8 2e 4b d7 ff 5b 41 5c 41 5d 5d c3
> <0f> ff eb b4 48 89 df e8 fb 65 00 00 5b 41 5c 41 5d 5d c3 0f ff
> [  116.529034] ---[ end trace a7814e3ec9a330c6 ]---
> [  147.424117] ------------[ cut here ]------------
> [  147.424150] WARNING: CPU: 2 PID: 24 at block/blk-mq.c:1144
> __blk_mq_run_hw_queue+0x89/0xa0
> [  147.424160] Modules linked in: ip_set_hash_ip ip_set nfnetlink
> x86_pkg_temp_thermal coretemp crct10dif_pclmul crc32_pclmul
> ghash_clmulni_intel pcbc aesni_intel crypto_simd glue_helper cryptd
> intel_rapl_perf pcspkr nfsd auth_rpcgss nfs_acl lockd grace sunrpc
ip_tables
> ext4 mbcache jbd2 xen_netfront xen_blkfront crc32c_intel
> [  147.424222] CPU: 2 PID: 24 Comm: kworker/2:0H Tainted: G        W
> 4.14.5-1.el7.elrepo.x86_64 #1
> [  147.424238] Workqueue: kblockd blk_mq_run_work_fn
> [  147.424247] task: ffff88007c539840 task.stack: ffffc900403e4000
> [  147.424259] RIP: e030:__blk_mq_run_hw_queue+0x89/0xa0
> [  147.424270] RSP: e02b:ffffc900403e7e30 EFLAGS: 00010202
> [  147.424279] RAX: 0000000000000001 RBX: ffff880003b83800 RCX:
> ffff88007d11bca0
> [  147.424288] RDX: ffff88007c656c88 RSI: 00000000000000a0 RDI:
> ffff880003b83800
> [  147.424298] RBP: ffffc900403e7e48 R08: 0000000000000000 R09:
> 0000000000000000
> [  147.424309] R10: 0000000000007ff0 R11: 00000000000074e5 R12:
> ffff88007c436900
> [  147.424319] R13: ffff88007d11bc80 R14: ffff88007d121b00 R15:
> ffff880003b83848
> [  147.424340] FS:  0000000000000000(0000) GS:ffff88007d100000(0000)
> knlGS:ffff88007d100000
> [  147.424350] CS:  e033 DS: 0000 ES: 0000 CR0: 0000000080050033
> [  147.424359] CR2: 00007f504f19a700 CR3: 0000000079bed000 CR4:
> 0000000000042660
> [  147.424370] Call Trace:
> [  147.424384]  blk_mq_run_work_fn+0x2c/0x30
> [  147.424400]  process_one_work+0x149/0x360
> [  147.424411]  worker_thread+0x4d/0x3e0
> [  147.424421]  kthread+0x109/0x140
> [  147.424432]  ? rescuer_thread+0x380/0x380
> [  147.424441]  ? kthread_park+0x60/0x60
> [  147.424455]  ret_from_fork+0x25/0x30
> [  147.424463] Code: 00 e8 7c c5 45 00 4c 89 e7 e8 14 4b d7 ff 48 89 df 41
> 89 c5 e8 19 66 00 00 44 89 ee 4c 89 e7 e8 2e 4b d7 ff 5b 41 5c 41 5d 5d c3
> <0f> ff eb b4 48 89 df e8 fb 65 00 00 5b 41 5c 41 5d 5d c3 0f ff
> [  147.424554] ---[ end trace a7814e3ec9a330c7 ]---
> -----CentOS 7 kernel-ml-4.14.5-1.el7.elrepo.x86_64 end here-----
>
> --
> Adi Pircalabu
> _______________________________________________
> CentOS-virt mailing list
> CentOS-virt at centos.org
> https://lists.centos.org/mailman/listinfo/centos-virt

Johnny Hughes

2017-Dec-19 15:12 UTC

head link

[CentOS-virt] Xen PV DomU running Kernel 4.14.5-1.el7.elrepo.x86_64: xl -v vcpu-set <domU> <val> triggers domU kernel WARNING, then domU becomes unresponsive

There are a couple of xen updates in the 4.9.66 and 4.9.68 kernels:

https://cdn.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.9.66
https://cdn.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.9.68

Let me build a newer Dom0 kernel and see if that helps.

Thanks,
Johnny Hughes


On 12/11/2017 06:52 PM, Adi Pircalabu wrote:> Has anyone seen this recently? I couldn't replicate it on:
> - CentOS 6 running kernel-2.6.32-696.16.1.el6.x86_64,
> kernel-lt-4.4.105-1.el6.elrepo.x86_64
> - CentOS 7 running 4.9.67-1.el7.centos.x86_64
> 
> But I can replicate it consistently running "xl -v vcpu-set
<domU>
> <val>" on:
> - CentOS 6 running 4.14.5-1.el6.elrepo.x86_64
> - CentOS 7 running 4.14.5-1.el7.elrepo.x86_64
> 
> dom0 versions tested with similar results in the domU:
> - 4.6.6-6.el7 on kernel 4.9.63-29.el7.x86_64
> - 4.6.3-15.el6 on kernel 4.9.37-29.el6.x86_64
> 
> Noticed behaviour:
> - These commands stall:
> top
> ls -l /var/tmp
> ls -l /tmp
> - Stuck in D state on the CentOS 7 domU:
> root???????? 5? 0.0? 0.0????? 0???? 0 ???????? D??? 11:20?? 0:00
> [kworker/u8:0]
> root?????? 316? 0.0? 0.0????? 0???? 0 ???????? D??? 11:20?? 0:00
> [jbd2/xvda1-8]
> root????? 1145? 0.0? 0.2 116636? 4776 ???????? Ds?? 11:20?? 0:00 -bash
> root????? 1289? 0.0? 0.1? 25852? 2420 ???????? Ds?? 11:35?? 0:00
> /usr/bin/systemd-tmpfiles --clean
> root????? 1290? 0.0? 0.1 125248? 2696 pts/1??? D+?? 11:44?? 0:00 ls
> --color=auto -l /tmp/
> root????? 1293? 0.0? 0.1 125248? 2568 pts/2??? D+?? 11:44?? 0:00 ls
> --color=auto -l /var/tmp
> root????? 1296? 0.0? 0.2 116636? 4908 pts/3??? Ds+? 11:44?? 0:00 -bash
> root????? 1358? 0.0? 0.1 125248? 2612 pts/4??? D+?? 11:47?? 0:00 ls
> --color=auto -l /var/tmp
> 
> At a first glance it appears the issue is in 4.14.5 kernel. Stack traces
> follow:
> 
> -----CentOS 6 kernel-ml-4.14.5-1.el6.elrepo.x86_64 start here-----
> ------------[ cut here ]------------
> WARNING: CPU: 4 PID: 60 at block/blk-mq.c:1144
> __blk_mq_run_hw_queue+0x9e/0xc0
> Modules linked in: intel_cstate(-) ipt_REJECT nf_reject_ipv4
> nf_conntrack_ipv4 nf_defrag_ipv4 xt_multiport iptable_filter ip_tables
> ip6t_REJECT nf_reject_ipv6 nf_conntrack_ipv6 nf_defrag_ipv6 xt_state
> nf_conntrack libcrc32c ip6table_filter ip6_tables dm_mod dax
> xen_netfront crc32_pclmul crct10dif_pclmul ghash_clmulni_intel
> crc32c_intel pcbc aesni_intel glue_helper crypto_simd cryptd aes_x86_64
> coretemp hwmon x86_pkg_temp_thermal sb_edac intel_rapl_perf pcspkr ext4
> jbd2 mbcache xen_blkfront
> CPU: 4 PID: 60 Comm: kworker/4:1H Not tainted 4.14.5-1.el6.elrepo.x86_64 #1
> Workqueue: kblockd blk_mq_run_work_fn
> task: ffff8802711a2780 task.stack: ffffc90041af4000
> RIP: e030:__blk_mq_run_hw_queue+0x9e/0xc0
> RSP: e02b:ffffc90041af7c48 EFLAGS: 00010202
> RAX: 0000000000000001 RBX: ffff88027117fa80 RCX: 0000000000000001
> RDX: ffff88026b053ee0 RSI: ffff88027351bca0 RDI: ffff88026b072800
> RBP: ffffc90041af7c68 R08: ffffc90041af7eb8 R09: ffff8802711a2810
> R10: 0000000000007ff0 R11: 0000000000000001 R12: ffff88026b072800
> R13: ffffe8ffffd04d00 R14: 0000000000000000 R15: ffffe8ffffd04d05
> FS:? 00002b7b7c89b700(0000) GS:ffff880273500000(0000)
> knlGS:0000000000000000
> CS:? e033 DS: 0000 ES: 0000 CR0: 0000000080050033
> CR2: ffffffffff600400 CR3: 000000026d953000 CR4: 0000000000042660
> Call Trace:
> ?blk_mq_run_work_fn+0x31/0x40
> ?process_one_work+0x174/0x440
> ?? xen_mc_flush+0xad/0x1b0
> ?? schedule+0x3a/0xa0
> ?worker_thread+0x6b/0x410
> ?? default_wake_function+0x12/0x20
> ?? __wake_up_common+0x84/0x130
> ?? maybe_create_worker+0x120/0x120
> ?? schedule+0x3a/0xa0
> ?? _raw_spin_unlock_irqrestore+0x16/0x20
> ?? maybe_create_worker+0x120/0x120
> ?kthread+0x111/0x150
> ?? __kthread_init_worker+0x40/0x40
> ?ret_from_fork+0x25/0x30
> Code: 89 df e8 06 2f d9 ff 4c 89 e7 41 89 c5 e8 0b 6e 00 00 44 89 ee 48
> 89 df e8 20 2f d9 ff 48 8b 5d e8 4c 8b 65 f0 4c 8b 6d f8 c9 c3 <0f>
ff
> eb aa 4c 89 e7 e8 e6 6d 00 00 48 8b 5d e8 4c 8b 65 f0 4c
> ---[ end trace fe2aaf4e723042fd ]---
> -----CentOS 6 kernel-ml-4.14.5-1.el6.elrepo.x86_64 end here-----
> 
> -----CentOS 7 kernel-ml-4.14.5-1.el7.elrepo.x86_64 start here-----
> [? 116.528885] ------------[ cut here ]------------
> [? 116.528894] WARNING: CPU: 3 PID: 38 at block/blk-mq.c:1144
> __blk_mq_run_hw_queue+0x89/0xa0
> [? 116.528898] Modules linked in: intel_cstate(-) ip_set_hash_ip ip_set
> nfnetlink x86_pkg_temp_thermal coretemp crct10dif_pclmul crc32_pclmul
> ghash_clmulni_intel pcbc aesni_intel crypto_simd glue_helper cryptd
> intel_rapl_perf pcspkr nfsd auth_rpcgss nfs_acl lockd grace sunrpc
> ip_tables ext4 mbcache jbd2 xen_netfront xen_blkfront crc32c_intel
> [? 116.528919] CPU: 3 PID: 38 Comm: kworker/3:1H Not tainted
> 4.14.5-1.el7.elrepo.x86_64 #1
> [? 116.529007] Code: 00 e8 7c c5 45 00 4c 89 e7 e8 14 4b d7 ff 48 89 df
> 41 89 c5 e8 19 66 00 00 44 89 ee 4c 89 e7 e8 2e 4b d7 ff 5b 41 5c 41 5d
> 5d c3 <0f> ff eb b4 48 89 df e8 fb 65 00 00 5b 41 5c 41 5d 5d c3 0f
ff
> [? 116.529034] ---[ end trace a7814e3ec9a330c6 ]---
> [? 147.424117] ------------[ cut here ]------------
> [? 147.424150] WARNING: CPU: 2 PID: 24 at block/blk-mq.c:1144
> __blk_mq_run_hw_queue+0x89/0xa0
> [? 147.424160] Modules linked in: ip_set_hash_ip ip_set nfnetlink
> x86_pkg_temp_thermal coretemp crct10dif_pclmul crc32_pclmul
> ghash_clmulni_intel pcbc aesni_intel crypto_simd glue_helper cryptd
> intel_rapl_perf pcspkr nfsd auth_rpcgss nfs_acl lockd grace sunrpc
> ip_tables ext4 mbcache jbd2 xen_netfront xen_blkfront crc32c_intel
> [? 147.424222] CPU: 2 PID: 24 Comm: kworker/2:0H Tainted: G??????? W????
> ? 4.14.5-1.el7.elrepo.x86_64 #1
> [? 147.424238] Workqueue: kblockd blk_mq_run_work_fn
> [? 147.424247] task: ffff88007c539840 task.stack: ffffc900403e4000
> [? 147.424259] RIP: e030:__blk_mq_run_hw_queue+0x89/0xa0
> [? 147.424270] RSP: e02b:ffffc900403e7e30 EFLAGS: 00010202
> [? 147.424279] RAX: 0000000000000001 RBX: ffff880003b83800 RCX:
> ffff88007d11bca0
> [? 147.424288] RDX: ffff88007c656c88 RSI: 00000000000000a0 RDI:
> ffff880003b83800
> [? 147.424298] RBP: ffffc900403e7e48 R08: 0000000000000000 R09:
> 0000000000000000
> [? 147.424309] R10: 0000000000007ff0 R11: 00000000000074e5 R12:
> ffff88007c436900
> [? 147.424319] R13: ffff88007d11bc80 R14: ffff88007d121b00 R15:
> ffff880003b83848
> [? 147.424340] FS:? 0000000000000000(0000) GS:ffff88007d100000(0000)
> knlGS:ffff88007d100000
> [? 147.424350] CS:? e033 DS: 0000 ES: 0000 CR0: 0000000080050033
> [? 147.424359] CR2: 00007f504f19a700 CR3: 0000000079bed000 CR4:
> 0000000000042660
> [? 147.424370] Call Trace:
> [? 147.424384]? blk_mq_run_work_fn+0x2c/0x30
> [? 147.424400]? process_one_work+0x149/0x360
> [? 147.424411]? worker_thread+0x4d/0x3e0
> [? 147.424421]? kthread+0x109/0x140
> [? 147.424432]? ? rescuer_thread+0x380/0x380
> [? 147.424441]? ? kthread_park+0x60/0x60
> [? 147.424455]? ret_from_fork+0x25/0x30
> [? 147.424463] Code: 00 e8 7c c5 45 00 4c 89 e7 e8 14 4b d7 ff 48 89 df
> 41 89 c5 e8 19 66 00 00 44 89 ee 4c 89 e7 e8 2e 4b d7 ff 5b 41 5c 41 5d
> 5d c3 <0f> ff eb b4 48 89 df e8 fb 65 00 00 5b 41 5c 41 5d 5d c3 0f
ff
> [? 147.424554] ---[ end trace a7814e3ec9a330c7 ]---
> -----CentOS 7 kernel-ml-4.14.5-1.el7.elrepo.x86_64 end here-----
> 

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Johnny Hughes

2017-Dec-19 22:17 UTC

head link

[CentOS-virt] Xen PV DomU running Kernel 4.14.5-1.el7.elrepo.x86_64: xl -v vcpu-set <domU> <val> triggers domU kernel WARNING, then domU becomes unresponsive

On 12/19/2017 09:12 AM, Johnny Hughes wrote:> There are a couple of xen updates in the 4.9.66 and 4.9.68 kernels:
> 
> https://cdn.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.9.66
> https://cdn.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.9.68
> 
> Let me build a newer Dom0 kernel and see if that helps.
> 
> Thanks,
> Johnny Hughes
> 
> 
OK .. I have built and pushed to the testing tag the following dom0 kernels:

kernel-4.9.70-29.el7
kernel-4.9.70-29.el6

they will show up in a couple hours here:

https://buildlogs.centos.org/centos/6/virt/x86_64/xen/

https://buildlogs.centos.org/centos/7/virt/x86_64/xen/


> On 12/11/2017 06:52 PM, Adi Pircalabu wrote:
>> Has anyone seen this recently? I couldn't replicate it on:
>> - CentOS 6 running kernel-2.6.32-696.16.1.el6.x86_64,
>> kernel-lt-4.4.105-1.el6.elrepo.x86_64
>> - CentOS 7 running 4.9.67-1.el7.centos.x86_64
>>
>> But I can replicate it consistently running "xl -v vcpu-set
<domU>
>> <val>" on:
>> - CentOS 6 running 4.14.5-1.el6.elrepo.x86_64
>> - CentOS 7 running 4.14.5-1.el7.elrepo.x86_64
>>
>> dom0 versions tested with similar results in the domU:
>> - 4.6.6-6.el7 on kernel 4.9.63-29.el7.x86_64
>> - 4.6.3-15.el6 on kernel 4.9.37-29.el6.x86_64
>>
>> Noticed behaviour:
>> - These commands stall:
>> top
>> ls -l /var/tmp
>> ls -l /tmp
>> - Stuck in D state on the CentOS 7 domU:
>> root???????? 5? 0.0? 0.0????? 0???? 0 ???????? D??? 11:20?? 0:00
>> [kworker/u8:0]
>> root?????? 316? 0.0? 0.0????? 0???? 0 ???????? D??? 11:20?? 0:00
>> [jbd2/xvda1-8]
>> root????? 1145? 0.0? 0.2 116636? 4776 ???????? Ds?? 11:20?? 0:00 -bash
>> root????? 1289? 0.0? 0.1? 25852? 2420 ???????? Ds?? 11:35?? 0:00
>> /usr/bin/systemd-tmpfiles --clean
>> root????? 1290? 0.0? 0.1 125248? 2696 pts/1??? D+?? 11:44?? 0:00 ls
>> --color=auto -l /tmp/
>> root????? 1293? 0.0? 0.1 125248? 2568 pts/2??? D+?? 11:44?? 0:00 ls
>> --color=auto -l /var/tmp
>> root????? 1296? 0.0? 0.2 116636? 4908 pts/3??? Ds+? 11:44?? 0:00 -bash
>> root????? 1358? 0.0? 0.1 125248? 2612 pts/4??? D+?? 11:47?? 0:00 ls
>> --color=auto -l /var/tmp
>>
>> At a first glance it appears the issue is in 4.14.5 kernel. Stack
traces
>> follow:
>>
>> -----CentOS 6 kernel-ml-4.14.5-1.el6.elrepo.x86_64 start here-----
>> ------------[ cut here ]------------
>> WARNING: CPU: 4 PID: 60 at block/blk-mq.c:1144
>> __blk_mq_run_hw_queue+0x9e/0xc0
>> Modules linked in: intel_cstate(-) ipt_REJECT nf_reject_ipv4
>> nf_conntrack_ipv4 nf_defrag_ipv4 xt_multiport iptable_filter ip_tables
>> ip6t_REJECT nf_reject_ipv6 nf_conntrack_ipv6 nf_defrag_ipv6 xt_state
>> nf_conntrack libcrc32c ip6table_filter ip6_tables dm_mod dax
>> xen_netfront crc32_pclmul crct10dif_pclmul ghash_clmulni_intel
>> crc32c_intel pcbc aesni_intel glue_helper crypto_simd cryptd aes_x86_64
>> coretemp hwmon x86_pkg_temp_thermal sb_edac intel_rapl_perf pcspkr ext4
>> jbd2 mbcache xen_blkfront
>> CPU: 4 PID: 60 Comm: kworker/4:1H Not tainted
4.14.5-1.el6.elrepo.x86_64 #1
>> Workqueue: kblockd blk_mq_run_work_fn
>> task: ffff8802711a2780 task.stack: ffffc90041af4000
>> RIP: e030:__blk_mq_run_hw_queue+0x9e/0xc0
>> RSP: e02b:ffffc90041af7c48 EFLAGS: 00010202
>> RAX: 0000000000000001 RBX: ffff88027117fa80 RCX: 0000000000000001
>> RDX: ffff88026b053ee0 RSI: ffff88027351bca0 RDI: ffff88026b072800
>> RBP: ffffc90041af7c68 R08: ffffc90041af7eb8 R09: ffff8802711a2810
>> R10: 0000000000007ff0 R11: 0000000000000001 R12: ffff88026b072800
>> R13: ffffe8ffffd04d00 R14: 0000000000000000 R15: ffffe8ffffd04d05
>> FS:? 00002b7b7c89b700(0000) GS:ffff880273500000(0000)
>> knlGS:0000000000000000
>> CS:? e033 DS: 0000 ES: 0000 CR0: 0000000080050033
>> CR2: ffffffffff600400 CR3: 000000026d953000 CR4: 0000000000042660
>> Call Trace:
>> ?blk_mq_run_work_fn+0x31/0x40
>> ?process_one_work+0x174/0x440
>> ?? xen_mc_flush+0xad/0x1b0
>> ?? schedule+0x3a/0xa0
>> ?worker_thread+0x6b/0x410
>> ?? default_wake_function+0x12/0x20
>> ?? __wake_up_common+0x84/0x130
>> ?? maybe_create_worker+0x120/0x120
>> ?? schedule+0x3a/0xa0
>> ?? _raw_spin_unlock_irqrestore+0x16/0x20
>> ?? maybe_create_worker+0x120/0x120
>> ?kthread+0x111/0x150
>> ?? __kthread_init_worker+0x40/0x40
>> ?ret_from_fork+0x25/0x30
>> Code: 89 df e8 06 2f d9 ff 4c 89 e7 41 89 c5 e8 0b 6e 00 00 44 89 ee 48
>> 89 df e8 20 2f d9 ff 48 8b 5d e8 4c 8b 65 f0 4c 8b 6d f8 c9 c3
<0f> ff
>> eb aa 4c 89 e7 e8 e6 6d 00 00 48 8b 5d e8 4c 8b 65 f0 4c
>> ---[ end trace fe2aaf4e723042fd ]---
>> -----CentOS 6 kernel-ml-4.14.5-1.el6.elrepo.x86_64 end here-----
>>
>> -----CentOS 7 kernel-ml-4.14.5-1.el7.elrepo.x86_64 start here-----
>> [? 116.528885] ------------[ cut here ]------------
>> [? 116.528894] WARNING: CPU: 3 PID: 38 at block/blk-mq.c:1144
>> __blk_mq_run_hw_queue+0x89/0xa0
>> [? 116.528898] Modules linked in: intel_cstate(-) ip_set_hash_ip ip_set
>> nfnetlink x86_pkg_temp_thermal coretemp crct10dif_pclmul crc32_pclmul
>> ghash_clmulni_intel pcbc aesni_intel crypto_simd glue_helper cryptd
>> intel_rapl_perf pcspkr nfsd auth_rpcgss nfs_acl lockd grace sunrpc
>> ip_tables ext4 mbcache jbd2 xen_netfront xen_blkfront crc32c_intel
>> [? 116.528919] CPU: 3 PID: 38 Comm: kworker/3:1H Not tainted
>> 4.14.5-1.el7.elrepo.x86_64 #1
>> [? 116.529007] Code: 00 e8 7c c5 45 00 4c 89 e7 e8 14 4b d7 ff 48 89 df
>> 41 89 c5 e8 19 66 00 00 44 89 ee 4c 89 e7 e8 2e 4b d7 ff 5b 41 5c 41 5d
>> 5d c3 <0f> ff eb b4 48 89 df e8 fb 65 00 00 5b 41 5c 41 5d 5d c3
0f ff
>> [? 116.529034] ---[ end trace a7814e3ec9a330c6 ]---
>> [? 147.424117] ------------[ cut here ]------------
>> [? 147.424150] WARNING: CPU: 2 PID: 24 at block/blk-mq.c:1144
>> __blk_mq_run_hw_queue+0x89/0xa0
>> [? 147.424160] Modules linked in: ip_set_hash_ip ip_set nfnetlink
>> x86_pkg_temp_thermal coretemp crct10dif_pclmul crc32_pclmul
>> ghash_clmulni_intel pcbc aesni_intel crypto_simd glue_helper cryptd
>> intel_rapl_perf pcspkr nfsd auth_rpcgss nfs_acl lockd grace sunrpc
>> ip_tables ext4 mbcache jbd2 xen_netfront xen_blkfront crc32c_intel
>> [? 147.424222] CPU: 2 PID: 24 Comm: kworker/2:0H Tainted: G???????
W????
>> ? 4.14.5-1.el7.elrepo.x86_64 #1
>> [? 147.424238] Workqueue: kblockd blk_mq_run_work_fn
>> [? 147.424247] task: ffff88007c539840 task.stack: ffffc900403e4000
>> [? 147.424259] RIP: e030:__blk_mq_run_hw_queue+0x89/0xa0
>> [? 147.424270] RSP: e02b:ffffc900403e7e30 EFLAGS: 00010202
>> [? 147.424279] RAX: 0000000000000001 RBX: ffff880003b83800 RCX:
>> ffff88007d11bca0
>> [? 147.424288] RDX: ffff88007c656c88 RSI: 00000000000000a0 RDI:
>> ffff880003b83800
>> [? 147.424298] RBP: ffffc900403e7e48 R08: 0000000000000000 R09:
>> 0000000000000000
>> [? 147.424309] R10: 0000000000007ff0 R11: 00000000000074e5 R12:
>> ffff88007c436900
>> [? 147.424319] R13: ffff88007d11bc80 R14: ffff88007d121b00 R15:
>> ffff880003b83848
>> [? 147.424340] FS:? 0000000000000000(0000) GS:ffff88007d100000(0000)
>> knlGS:ffff88007d100000
>> [? 147.424350] CS:? e033 DS: 0000 ES: 0000 CR0: 0000000080050033
>> [? 147.424359] CR2: 00007f504f19a700 CR3: 0000000079bed000 CR4:
>> 0000000000042660
>> [? 147.424370] Call Trace:
>> [? 147.424384]? blk_mq_run_work_fn+0x2c/0x30
>> [? 147.424400]? process_one_work+0x149/0x360
>> [? 147.424411]? worker_thread+0x4d/0x3e0
>> [? 147.424421]? kthread+0x109/0x140
>> [? 147.424432]? ? rescuer_thread+0x380/0x380
>> [? 147.424441]? ? kthread_park+0x60/0x60
>> [? 147.424455]? ret_from_fork+0x25/0x30
>> [? 147.424463] Code: 00 e8 7c c5 45 00 4c 89 e7 e8 14 4b d7 ff 48 89 df
>> 41 89 c5 e8 19 66 00 00 44 89 ee 4c 89 e7 e8 2e 4b d7 ff 5b 41 5c 41 5d
>> 5d c3 <0f> ff eb b4 48 89 df e8 fb 65 00 00 5b 41 5c 41 5d 5d c3
0f ff
>> [? 147.424554] ---[ end trace a7814e3ec9a330c7 ]---
>> -----CentOS 7 kernel-ml-4.14.5-1.el7.elrepo.x86_64 end here-----
>>
> 
> 
> 
> 
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> CentOS-virt at centos.org
> https://lists.centos.org/mailman/listinfo/centos-virt
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CentOS virt - Dec 2017 - Xen PV DomU running Kernel 4.14.5-1.el7.elrepo.x86_64: xl -v vcpu-set <domU> <val> triggers domU kernel WARNING, then domU becomes unresponsive

[CentOS-virt] Xen PV DomU running Kernel 4.14.5-1.el7.elrepo.x86_64: xl -v vcpu-set <domU> <val> triggers domU kernel WARNING, then domU becomes unresponsive

[CentOS-virt] Xen PV DomU running Kernel 4.14.5-1.el7.elrepo.x86_64: xl -v vcpu-set <domU> <val> triggers domU kernel WARNING, then domU becomes unresponsive

[CentOS-virt] Xen PV DomU running Kernel 4.14.5-1.el7.elrepo.x86_64: xl -v vcpu-set <domU> <val> triggers domU kernel WARNING, then domU becomes unresponsive

[CentOS-virt] Xen PV DomU running Kernel 4.14.5-1.el7.elrepo.x86_64: xl -v vcpu-set <domU> <val> triggers domU kernel WARNING, then domU becomes unresponsive

[CentOS-virt] Xen PV DomU running Kernel 4.14.5-1.el7.elrepo.x86_64: xl -v vcpu-set <domU> <val> triggers domU kernel WARNING, then domU becomes unresponsive

[CentOS-virt] Xen PV DomU running Kernel 4.14.5-1.el7.elrepo.x86_64: xl -v vcpu-set <domU> <val> triggers domU kernel WARNING, then domU becomes unresponsive

Apparently Analagous Threads