Debdiffs for this bug were attached to LP#1800562 ** Description changed:
[Impact] Crash kernels do not advise some subsystems to perform a reset by default. [Description] Kernel has the "reset_devices" parameter that drivers can opt-in, and perform special activity in case this parameter is parsed from command-line. For example, in kdump kernels it hints the drivers that they (maybe) are booting from a non-healthy condition and needs to issue some reset to the adapter. Users currently (kernel v4.19) are: hpsa, ipr, megaraid_sas, mpt3sas, smartpqi, xenbus. This should be enabled by default in the kdump config file to be added in the kdump kernel command-line for all versions. [Test Case] 1) Deploy a Disco VM e.g. with uvt-kvm 2) Install the kdump-tools package 3) Run `kdump-config test`and check for the 'reset_devices' parameter: $ kdump-config test - [...] + ... kexec command to be used: - /sbin/kexec -p --command-line="BOOT_IMAGE=/boot/vmlinuz-4.15.0-45-generic root=LABEL=cloudimg-rootfs ro console=tty1 console=ttyS0 nr_cpus=1 systemd.unit=kdump-tools.service irqpoll nousb ata_piix.prefer_ms_hyperv=0" /var/lib/kdump/vmlinuz + /sbin/kexec -p --command-line="BOOT_IMAGE=/boot/vmlinuz-4.15.0-45-generic root=LABEL=cloudimg-rootfs ro console=tty1 console=ttyS0 nr_cpus=1 systemd.unit=kdump-tools.service irqpoll nousb ata_piix.prefer_ms_hyperv=0" /var/lib/kdump/vmlinuz [Regression Potential] The regression potential is very low, since it doesn't need any changes in makedumpfile code and we're only adding a parameter on the crashkernel cmdline. The fix will be tested with autopkgtests and normal kdump use-case scenarios. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1800566 Title: Make the reset_devices parameter default for kdump kernels To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/makedumpfile/+bug/1800566/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
