Hello IBM, Could you please verify if the Xenial kernel currently in -proposed fixes the issue?
Thank you. -- 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/1728098 Title: [kernel] tty/hvc: Use opal irqchip interface if available Status in The Ubuntu-power-systems project: Fix Committed Status in linux package in Ubuntu: In Progress Status in linux source package in Xenial: Fix Committed Bug description: == SRU Justification == This bug is fixed by commit 00dab8187e18. The commit updates the hvc driver to use the OPAL irqchip if made available by the running firmware. If it is not present, the driver falls back to the existing OPAL event number. Commit 00dab8187e18 was added to mainline is v4.8-rc1, so it is not needed in releases newer than Xenial. The commit is a clean cherry pick in Xenial. == Fix == commit 00dab8187e182da41122f66c207707b192509df4 Author: Sam Mendoza-Jonas <s...@mendozajonas.com> Date: Mon Jul 11 13:38:58 2016 +1000 tty/hvc: Use opal irqchip interface if available == Regression Potential == This change is specific to the hvc driver and has been in mainline since v4.8-rc1 without any issues reported. == Test Case == A test kernel was built with this patch and tested by the original bug reporter. The bug reporter states the test kernel resolved the bug. ---Problem Description--- Please backport console irq patch . commit 00dab8187e182da41122f66c207707b192509df4 Author: Sam Mendoza-Jonas <s...@mendozajonas.com> Date: Mon Jul 11 13:38:58 2016 +1000 tty/hvc: Use opal irqchip interface if available Update the hvc driver to use the OPAL irqchip if made available by the running firmware. If it is not present, the driver falls back to the existing OPAL event number. Signed-off-by: Samuel Mendoza-Jonas <s...@mendozajonas.com> Signed-off-by: Michael Ellerman <m...@ellerman.id.au> ---uname output--- Linux tul217p1 4.4.0-98-generic #121-Ubuntu SMP Tue Oct 10 14:23:01 UTC 2017 ppc64le ppc64le ppc64le GNU/Linux Machine Type = FSP based PowerNV system Canonical, We need this patch in 16.04 GA 4.4 kernel. This fix will avoid the following error: Oct 19 22:15:07 tul217p1 kernel: sched: RT throttling activated Oct 19 22:15:49 tul217p1 kernel: INFO: rcu_sched self-detected stall on CPU Oct 19 22:15:49 tul217p1 kernel: 21-...: (85 GPs behind) idle=d29/140000000000002/0 softirq=26316/26316 fqs=4417 Oct 19 22:15:49 tul217p1 kernel: (t=5250 jiffies g=30019 c=30018 q=20591) Oct 19 22:15:49 tul217p1 kernel: Call Trace: Oct 19 22:15:49 tul217p1 kernel: [c0000007f4d0f110] [c0000000000fcbe0] sched_show_task+0xe0/0x180 (unreliable) Oct 19 22:15:49 tul217p1 kernel: [c0000007f4d0f180] [c00000000013fcf4] rcu_dump_cpu_stacks+0xe4/0x150 Oct 19 22:15:49 tul217p1 kernel: [c0000007f4d0f1d0] [c000000000145424] rcu_check_callbacks+0x6b4/0x9b0 Oct 19 22:15:49 tul217p1 kernel: [c0000007f4d0f300] [c00000000014d288] update_process_times+0x58/0xa0 Oct 19 22:15:49 tul217p1 kernel: [c0000007f4d0f330] [c0000000001649b8] tick_sched_handle.isra.6+0x48/0xe0 Oct 19 22:15:49 tul217p1 kernel: [c0000007f4d0f370] [c000000000164ab4] tick_sched_timer+0x64/0xd0 Oct 19 22:15:49 tul217p1 kernel: [c0000007f4d0f3b0] [c00000000014dd54] __hrtimer_run_queues+0x124/0x450 Oct 19 22:15:49 tul217p1 kernel: [c0000007f4d0f440] [c00000000014ed7c] hrtimer_interrupt+0xec/0x2c0 Oct 19 22:15:49 tul217p1 kernel: [c0000007f4d0f500] [c00000000001f5fc] __timer_interrupt+0x8c/0x290 Oct 19 22:15:49 tul217p1 kernel: [c0000007f4d0f550] [c00000000001f9b0] timer_interrupt+0xa0/0xe0 Oct 19 22:15:49 tul217p1 kernel: [c0000007f4d0f580] [c0000000000099d8] restore_check_irq_replay+0x54/0x70 Oct 19 22:15:49 tul217p1 kernel: --- interrupt: 901 at arch_local_irq_restore+0x74/0x90 LR = arch_local_irq_restore+0x74/0x90 Oct 19 22:15:49 tul217p1 kernel: [c0000007f4d0f870] [7fffffffffffffff] 0x7fffffffffffffff (unreliable) Oct 19 22:15:49 tul217p1 kernel: [c0000007f4d0f890] [c0000000000bf808] __do_softirq+0xd8/0x3e0 Oct 19 22:15:49 tul217p1 kernel: [c0000007f4d0f980] [c0000000000bfd88] irq_exit+0xc8/0x100 Oct 19 22:15:49 tul217p1 kernel: [c0000007f4d0f9a0] [c00000000001f9b4] timer_interrupt+0xa4/0xe0 Oct 19 22:15:49 tul217p1 kernel: [c0000007f4d0f9d0] [c0000000000099d8] restore_check_irq_replay+0x54/0x70 Oct 19 22:15:49 tul217p1 kernel: --- interrupt: 901 at irq_work_queue+0x60/0xd0 LR = irq_work_queue+0xa4/0xd0 Oct 19 22:15:49 tul217p1 kernel: [c0000007f4d0fcc0] [c0000007f4d0fd00] 0xc0000007f4d0fd00 (unreliable) Oct 19 22:15:49 tul217p1 kernel: [c0000007f4d0fcf0] [c000000000076a98] opal_handle_events+0x108/0x130 Oct 19 22:15:49 tul217p1 kernel: [c0000007f4d0fd40] [c000000000070fc8] kopald+0x78/0x100 Oct 19 22:15:49 tul217p1 kernel: [c0000007f4d0fd80] [c0000000000e7374] kthread+0x124/0x150 Oct 19 22:15:49 tul217p1 kernel: [c0000007f4d0fe30] [c000000000009538] ret_from_kernel_thread+0x5c/0xa4 Oct 19 22:15:54 tul217p1 kernel: NMI watchdog: BUG: soft lockup - CPU#21 stuck for 23s! [kopald:494] Oct 19 22:15:54 tul217p1 kernel: Modules linked in: ibmpowernv binfmt_misc ipmi_powernv ipmi_msghandler leds_powernv powernv_rng uio_pdrv_genirq uio vmx_crypto nfsd auth_rpcgss nfs_acl lockd ib_iser grace rdma_cm iw_cm sunrpc ib_cm ib_sa ib_mad ib_core ib_ addr iscsi_tcp libiscsi_tcp libiscsi scsi_transport_iscsi autofs4 btrfs raid10 raid456 async_raid6_recov async_memcpy async_pq a sync_xor async_tx xor raid6_pq libcrc32c raid1 raid0 multipath linear ipr cxl Oct 19 22:15:54 tul217p1 kernel: CPU: 21 PID: 494 Comm: kopald Not tainted 4.4.0-98-generic #121-Ubuntu Oct 19 22:15:54 tul217p1 kernel: task: c0000007f4cc3f30 ti: c0000007f4d0c000 task.ti: c0000007f4d0c000 Oct 19 22:15:54 tul217p1 kernel: NIP: c000000000010964 LR: c000000000010964 CTR: c00000000001f100 Oct 19 22:15:54 tul217p1 kernel: REGS: c0000007f4d0f5f0 TRAP: 0901 Not tainted (4.4.0-98-generic) Oct 19 22:15:54 tul217p1 kernel: MSR: 9000000000009033 <SF,HV,EE,ME,IR,DR,RI,LE> CR: 28000824 XER: 20000000 Oct 19 22:15:54 tul217p1 kernel: CFAR: c000000000009958 SOFTE: 1 GPR00: c0000000000bf808 c0000007f4d0f870 c000000001608300 0000000000000900 GPR04: c0000007fbd40400 0000000000000001 0000000000000018 0000000001f404db GPR08: 0000000000000000 0000000000000000 c0000007f4d0c000 0000000000000005 GPR12: c00000000006e3c8 c00000000fb4c780 Oct 19 22:15:54 tul217p1 kernel: NIP [c000000000010964] arch_local_irq_restore+0x74/0x90 Oct 19 22:15:54 tul217p1 kernel: LR [c000000000010964] arch_local_irq_restore+0x74/0x90 Oct 19 22:15:54 tul217p1 kernel: Call Trace: Oct 19 22:15:54 tul217p1 kernel: [c0000007f4d0f870] [7fffffffffffffff] 0x7fffffffffffffff (unreliable) Oct 19 22:15:54 tul217p1 kernel: [c0000007f4d0f890] [c0000000000bf808] __do_softirq+0xd8/0x3e0 Oct 19 22:15:54 tul217p1 kernel: [c0000007f4d0f980] [c0000000000bfd88] irq_exit+0xc8/0x100 Oct 19 22:15:54 tul217p1 kernel: [c0000007f4d0f9a0] [c00000000001f9b4] timer_interrupt+0xa4/0xe0 Oct 19 22:15:54 tul217p1 kernel: [c0000007f4d0f9d0] [c0000000000099d8] restore_check_irq_replay+0x54/0x70 Oct 19 22:15:54 tul217p1 kernel: --- interrupt: 901 at irq_work_queue+0x60/0xd0 LR = irq_work_queue+0xa4/0xd0 Oct 19 22:15:54 tul217p1 kernel: [c0000007f4d0fcc0] [c0000007f4d0fd00] 0xc0000007f4d0fd00 (unreliable) Oct 19 22:15:54 tul217p1 kernel: [c0000007f4d0fcf0] [c000000000076a98] opal_handle_events+0x108/0x130 Oct 19 22:15:54 tul217p1 kernel: [c0000007f4d0fd40] [c000000000070fc8] kopald+0x78/0x100 Oct 19 22:15:54 tul217p1 kernel: [c0000007f4d0fd80] [c0000000000e7374] kthread+0x124/0x150 Oct 19 22:15:54 tul217p1 kernel: [c0000007f4d0fe30] [c000000000009538] ret_from_kernel_thread+0x5c/0xa4 Oct 19 22:15:54 tul217p1 kernel: Instruction dump: Oct 19 22:15:54 tul217p1 kernel: 994d02ca 2fa30000 409e0024 e92d0020 61298000 7d210164 38210020 e8010010 Oct 19 22:15:54 tul217p1 kernel: 7c0803a6 4e800020 60420000 4bff186d <60000000> 4bffffe4 60420000 e92d0020 Oct 19 22:16:39 tul217p1 kernel: INFO: rcu_sched self-detected stall on CPU Oct 19 22:16:39 tul217p1 kernel: 16-...: (301 GPs behind) idle=5b5/140000000000002/0 softirq=2284/2284 fqs=4838 Oct 19 22:16:39 tul217p1 kernel: (t=5250 jiffies g=30159 c=30158 q=20605) Oct 19 22:16:39 tul217p1 kernel: Call Trace: Oct 19 22:16:39 tul217p1 kernel: [c0000007f4d0f150] [c0000000000fcbe0] sched_show_task+0xe0/0x180 (unreliable) Oct 19 22:16:39 tul217p1 kernel: [c0000007f4d0f1c0] [c00000000013fcf4] rcu_dump_cpu_stacks+0xe4/0x150 Oct 19 22:16:39 tul217p1 kernel: [c0000007f4d0f210] [c000000000145424] rcu_check_callbacks+0x6b4/0x9b0 Oct 19 22:16:39 tul217p1 kernel: [c0000007f4d0f340] [c00000000014d288] update_process_times+0x58/0xa0 Oct 19 22:16:39 tul217p1 kernel: [c0000007f4d0f370] [c0000000001649b8] tick_sched_handle.isra.6+0x48/0xe0 Oct 19 22:16:39 tul217p1 kernel: [c0000007f4d0f3b0] [c000000000164ab4] tick_sched_timer+0x64/0xd0 Oct 19 22:16:39 tul217p1 kernel: [c0000007f4d0f3f0] [c00000000014dd54] __hrtimer_run_queues+0x124/0x450 Oct 19 22:16:39 tul217p1 kernel: [c0000007f4d0f480] [c00000000014ed7c] hrtimer_interrupt+0xec/0x2c0 Oct 19 22:16:39 tul217p1 kernel: [c0000007f4d0f540] [c00000000001f5fc] __timer_interrupt+0x8c/0x290 Oct 19 22:16:39 tul217p1 kernel: [c0000007f4d0f590] [c00000000001f9b0] timer_interrupt+0xa0/0xe0 Oct 19 22:16:39 tul217p1 kernel: [c0000007f4d0f5c0] [c0000000000099d8] restore_check_irq_replay+0x54/0x70 Oct 19 22:16:39 tul217p1 kernel: --- interrupt: 901 at arch_local_irq_restore+0x74/0x90 To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu-power-systems/+bug/1728098/+subscriptions -- Mailing list: https://launchpad.net/~kernel-packages Post to : kernel-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~kernel-packages More help : https://help.launchpad.net/ListHelp
