Last time I did verification against gallery image, the default kernel version is 4.4.0-148-generic. And I tried below kernel, found the kernel linux-image-4.15.0-1042-azure is the first one which we hit this bug, it is not specific for the esm kernel.
# Kernel Version/Package Result 0 Default kernel 4.4.0-148-generic => Good 1 linux-image-4.15.0-1023-azure => Good 2 linux-image-4.15.0-1030-azure 3 linux-image-4.15.0-1031-azure 4 linux-image-4.15.0-1032-azure 5 linux-image-4.15.0-1035-azure 6 linux-image-4.15.0-1036-azure => Good 7 linux-image-4.15.0-1037-azure 8 linux-image-4.15.0-1039-azure 9 linux-image-4.15.0-1040-azure => Good 10 linux-image-4.15.0-1041-azure => Good 11 linux-image-4.15.0-1042-azure => Bad 12 linux-image-4.15.0-1045-azure => Bad -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux-azure in Ubuntu. https://bugs.launchpad.net/bugs/1882623 Title: VM enter into hung status after triggering a crash Status in linux-azure package in Ubuntu: New Bug description: Create VM on Azure using Canonical UbuntuServer 14.04.5-LTS latest using size Standard DS2 v2 Install kexec-tools kdump-tools makedumpfile, configure boot kernel parameter crashkernel=512M Run sed -i 's/USE_KDUMP=0/USE_KDUMP=1/g' /etc/default/kdump-tools and sed -i 's/LOAD_KEXEC=true/LOAD_KEXEC=false/g' /etc/default/kexec Reboot VM, make sure crash kernel memory reserved successfully Trigger a crash by run echo 1 > /proc/sys/kernel/sysrq, then echo c > /proc/sysrq-trigger, VM will reboot automatically and after reboot, check crash dump is generated under /var/crash Install linux-azure kernel Enable private-ppa canonical-kernel-esm Install kernel linux-azure, reboot VM, kernel version 4.15.0-1084-azure Trigger a crash by run echo 1 > /proc/sys/kernel/sysrq, then echo c > /proc/sysrq-trigger, VM entered into a hung status. Attach whole serial console [ 65.452007] INFO: rcu_sched detected stalls on CPUs/tasks: [ 65.456004] 1-...!: (0 ticks this GP) idle=488/0/0 softirq=1/1 fqs=0 [ 65.456004] (detected by 0, t=15002 jiffies, g=707, c=706, q=8457) [ 65.456004] rcu_sched kthread starved for 15002 jiffies! g707 c706 f0x0 RCU_GP_WAIT_FQS(3) ->state=0x402 ->cpu=1 [ 360.020026] INFO: rcu_sched detected stalls on CPUs/tasks: [ 360.024015] 1-...!: (10 GPs behind) idle=b34/0/0 softirq=1/1 fqs=1 [ 360.024015] (detected by 0, t=15002 jiffies, g=717, c=716, q=6429) [ 360.024015] rcu_sched kthread starved for 15000 jiffies! g717 c716 f0x0 RCU_GP_WAIT_FQS(3) ->state=0x402 ->cpu=1 [ 420.048010] INFO: rcu_sched detected stalls on CPUs/tasks: [ 420.052006] 1-...!: (0 ticks this GP) idle=f94/0/0 softirq=1/1 fqs=0 [ 420.052006] (detected by 0, t=15002 jiffies, g=718, c=717, q=6429) [ 420.052006] rcu_sched kthread starved for 15002 jiffies! g718 c717 f0x0 RCU_GP_WAIT_FQS(3) ->state=0x402 ->cpu=1 To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux-azure/+bug/1882623/+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
