[Kernel-packages] [Bug 1855679] Comment bridged from LTC Bugzilla
--- Comment From srikar.dronamr...@in.ibm.com 2020-11-02 01:52 EDT---
Harish,
Since its not updated for a while now, lets close this bug and reopen this or a
new one if we see similar problem again.
Since we dont know if this problem still exists or not, I am marking
this bug as will_not_fix.
--
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https://bugs.launchpad.net/bugs/1855679
Title:
Rcu stalls and Soft-lockups observed on stressing Ubuntu 18 04 1
Status in The Ubuntu-power-systems project:
Invalid
Status in linux package in Ubuntu:
Invalid
Bug description:
== Comment: #0 - Harish Sriram - 2018-07-31 03:50:07 ==
--Problem Description--
Rcu stalls and Soft-lockups observed on stressing Ubuntu 18 04 1
Contact Information = hasri...@in.ibm.com
---Issue observed---
[ 1196.813220] INFO: rcu_sched detected stalls on CPUs/tasks:
[ 1196.813241]0-: (19 ticks this GP) idle=966/140/0
softirq=11580/11580 fqs=1552
[ 1196.813249](detected by 24, t=5252 jiffies, g=11722, c=11721,
q=1061088)
[ 1196.813282] Task dump for CPU 0:
[ 1196.813285] stress-ng-dev R running task0 46323 33635
0x00042004
[ 1196.813294] Call Trace:
[ 1196.813310] [c02c75ad7b10] [c18bd940] log_first_seq+0x0/0x8
(unreliable)
[ 1198.508930] kauditd_printk_skb: 3 callbacks suppressed
[ 1198.508938] audit: type=1400 audit(1533020002.449:312): apparmor="STATUS"
operation="profile_load" profile="unconfined" name="/usr/bin/pulseaudio-eg"
pid=12813 comm="stress-ng-appar"
[ 1198.508954] audit: type=1400 audit(1533020002.449:313): apparmor="STATUS"
operation="profile_load" profile="unconfined"
name="/usr/bin/pulseaudio-eg///usr/lib/pulseaudio/pulse/gconf-helper" pid=12813
comm="stress-ng-appar"
[ 1199.361719] INFO: rcu_sched detected expedited stalls on CPUs/tasks: {
0-... 145-... 159-... } 5489 jiffies s: 173 root: 0x201/.
[ 1199.361742] blocking rcu_node structures: l=1:0-15:0x1/.
l=1:144-159:0x8002/.
[ 1199.361749] Task dump for CPU 0:
[ 1199.361752] stress-ng-dev R running task0 46323 33635
0x00042004
[ 1199.361757] Call Trace:
[ 1199.361769] [c02c75ad7b10] [c18bd940] log_first_seq+0x0/0x8
(unreliable)
[ 1199.361777] Task dump for CPU 145:
[ 1199.361779] migration/145 R running task0 883 2
0x0804
[ 1199.361783] Call Trace:
[ 1199.361787] [c02ff0f5fa40] [c02ff0f5fb00] 0xc02ff0f5fb00
(unreliable)
[ 1199.361791] Task dump for CPU 159:
[ 1199.361792] migration/159 R running task0 967 2
0x0804
[ 1199.361796] Call Trace:
[ 1199.361799] [c02d78a47a40] [c02d78a47b00] 0xc02d78a47b00
(unreliable)
[ 1199.787698] audit: type=1400 audit(1533020003.985:314): apparmor="STATUS"
operation="profile_replace" profile="unconfined" name="/usr/bin/pulseaudio-eg"
pid=12813 comm="stress-ng-appar"
[ 1200.781159] watchdog: BUG: soft lockup - CPU#145 stuck for 23s!
[migration/145:883]
[ 1200.781163] Modules linked in: snd_seq snd_seq_device snd_timer snd
soundcore kvm_hv kvm_pr kvm camellia_generic cast6_generic cast_common
serpent_generic vhost_vsock vmw_vsock_virtio_transport_common vsock
twofish_generic twofish_common vhost_net vhost tap hci_vhci bluetooth
ecdh_generic lrw userio algif_skcipher binfmt_misc tgr192 wp512 rmd320
unix_diag sctp rmd256 rmd160 rmd128 md4 dccp_ipv4 algif_hash dccp af_alg
powernv_op_panel ipmi_powernv ipmi_devintf ipmi_msghandler uio_pdrv_genirq
leds_powernv uio ibmpowernv powernv_rng vmx_crypto sch_fq_codel ib_iser rdma_cm
iw_cm ib_cm ib_core iscsi_tcp libiscsi_tcp libiscsi scsi_transport_iscsi
ip_tables x_tables autofs4 ses enclosure scsi_transport_sas btrfs zstd_compress
raid10 raid456 async_raid6_recov async_memcpy async_pq async_xor async_tx xor
[ 1200.781321] raid6_pq libcrc32c raid1 raid0 multipath linear uas
usb_storage crct10dif_vpmsum crc32c_vpmsum tg3 ipr
[ 1200.781353] CPU: 145 PID: 883 Comm: migration/145 Not tainted
4.15.0-29-generic #31-Ubuntu
[ 1200.781359] NIP: c0206594 LR: c020699c CTR:
c0206470
[ 1200.781364] REGS: c02ff0f5f9e0 TRAP: 0901 Not tainted
(4.15.0-29-generic)
[ 1200.781366] MSR: 90019033 CR:
2800 XER: 2000
[ 1200.781392] CFAR: c02065a4 SOFTE: 1
GPR00: c020699c c02ff0f5fc60 c16eaf00
GPR04: 0001 002ffbf9 009dde82957a
GPR08: cfae3b00 0001 c0d432f8
0bdf
GPR12: cfae3b00
[ 1200.781453] NIP [c0206594] multi_cpu_stop+0x124/0x1f0
[ 1200.781461] LR [c020699c] cpu_stopper_thread+0xfc/0x1f0
[ 1200.781462] Call Trace:
[ 1200.781475] [c02ff0f5fc60] [c02ff0f5fd40]
[Kernel-packages] [Bug 1855679] Comment bridged from LTC Bugzilla
--- Comment From mranw...@us.ibm.com 2020-02-17 01:53 EDT---
On the original (old) kernel on a tuleta (p8) I was able to create a hard
lockup. I haven't been able to recreate that on the -76 kernel on a tuleta. I
did, however, recreate a stall on the tuleta. I did not see either on some run
time on a boston.
I'm going to compare this with focal on the tuleta.
--
You received this bug notification because you are a member of Kernel
Packages, which is subscribed to linux in Ubuntu.
https://bugs.launchpad.net/bugs/1855679
Title:
Rcu stalls and Soft-lockups observed on stressing Ubuntu 18 04 1
Status in The Ubuntu-power-systems project:
Incomplete
Status in linux package in Ubuntu:
Incomplete
Bug description:
== Comment: #0 - Harish Sriram - 2018-07-31 03:50:07 ==
--Problem Description--
Rcu stalls and Soft-lockups observed on stressing Ubuntu 18 04 1
Contact Information = hasri...@in.ibm.com
---Issue observed---
[ 1196.813220] INFO: rcu_sched detected stalls on CPUs/tasks:
[ 1196.813241]0-: (19 ticks this GP) idle=966/140/0
softirq=11580/11580 fqs=1552
[ 1196.813249](detected by 24, t=5252 jiffies, g=11722, c=11721,
q=1061088)
[ 1196.813282] Task dump for CPU 0:
[ 1196.813285] stress-ng-dev R running task0 46323 33635
0x00042004
[ 1196.813294] Call Trace:
[ 1196.813310] [c02c75ad7b10] [c18bd940] log_first_seq+0x0/0x8
(unreliable)
[ 1198.508930] kauditd_printk_skb: 3 callbacks suppressed
[ 1198.508938] audit: type=1400 audit(1533020002.449:312): apparmor="STATUS"
operation="profile_load" profile="unconfined" name="/usr/bin/pulseaudio-eg"
pid=12813 comm="stress-ng-appar"
[ 1198.508954] audit: type=1400 audit(1533020002.449:313): apparmor="STATUS"
operation="profile_load" profile="unconfined"
name="/usr/bin/pulseaudio-eg///usr/lib/pulseaudio/pulse/gconf-helper" pid=12813
comm="stress-ng-appar"
[ 1199.361719] INFO: rcu_sched detected expedited stalls on CPUs/tasks: {
0-... 145-... 159-... } 5489 jiffies s: 173 root: 0x201/.
[ 1199.361742] blocking rcu_node structures: l=1:0-15:0x1/.
l=1:144-159:0x8002/.
[ 1199.361749] Task dump for CPU 0:
[ 1199.361752] stress-ng-dev R running task0 46323 33635
0x00042004
[ 1199.361757] Call Trace:
[ 1199.361769] [c02c75ad7b10] [c18bd940] log_first_seq+0x0/0x8
(unreliable)
[ 1199.361777] Task dump for CPU 145:
[ 1199.361779] migration/145 R running task0 883 2
0x0804
[ 1199.361783] Call Trace:
[ 1199.361787] [c02ff0f5fa40] [c02ff0f5fb00] 0xc02ff0f5fb00
(unreliable)
[ 1199.361791] Task dump for CPU 159:
[ 1199.361792] migration/159 R running task0 967 2
0x0804
[ 1199.361796] Call Trace:
[ 1199.361799] [c02d78a47a40] [c02d78a47b00] 0xc02d78a47b00
(unreliable)
[ 1199.787698] audit: type=1400 audit(1533020003.985:314): apparmor="STATUS"
operation="profile_replace" profile="unconfined" name="/usr/bin/pulseaudio-eg"
pid=12813 comm="stress-ng-appar"
[ 1200.781159] watchdog: BUG: soft lockup - CPU#145 stuck for 23s!
[migration/145:883]
[ 1200.781163] Modules linked in: snd_seq snd_seq_device snd_timer snd
soundcore kvm_hv kvm_pr kvm camellia_generic cast6_generic cast_common
serpent_generic vhost_vsock vmw_vsock_virtio_transport_common vsock
twofish_generic twofish_common vhost_net vhost tap hci_vhci bluetooth
ecdh_generic lrw userio algif_skcipher binfmt_misc tgr192 wp512 rmd320
unix_diag sctp rmd256 rmd160 rmd128 md4 dccp_ipv4 algif_hash dccp af_alg
powernv_op_panel ipmi_powernv ipmi_devintf ipmi_msghandler uio_pdrv_genirq
leds_powernv uio ibmpowernv powernv_rng vmx_crypto sch_fq_codel ib_iser rdma_cm
iw_cm ib_cm ib_core iscsi_tcp libiscsi_tcp libiscsi scsi_transport_iscsi
ip_tables x_tables autofs4 ses enclosure scsi_transport_sas btrfs zstd_compress
raid10 raid456 async_raid6_recov async_memcpy async_pq async_xor async_tx xor
[ 1200.781321] raid6_pq libcrc32c raid1 raid0 multipath linear uas
usb_storage crct10dif_vpmsum crc32c_vpmsum tg3 ipr
[ 1200.781353] CPU: 145 PID: 883 Comm: migration/145 Not tainted
4.15.0-29-generic #31-Ubuntu
[ 1200.781359] NIP: c0206594 LR: c020699c CTR:
c0206470
[ 1200.781364] REGS: c02ff0f5f9e0 TRAP: 0901 Not tainted
(4.15.0-29-generic)
[ 1200.781366] MSR: 90019033 CR:
2800 XER: 2000
[ 1200.781392] CFAR: c02065a4 SOFTE: 1
GPR00: c020699c c02ff0f5fc60 c16eaf00
GPR04: 0001 002ffbf9 009dde82957a
GPR08: cfae3b00 0001 c0d432f8
0bdf
GPR12: cfae3b00
[ 1200.781453] NIP [c0206594] multi_cpu_stop+0x124/0x1f0
[ 1200.781461] LR [c020699c] cpu_stopper_thread+0xfc/0x1f0
[ 1200.781462]
