Public bug reported: [Impact]
The CONFIG_WATCHDOG_HRTIMER_PRETIMEOUT option allows to support pretimeout actions on device drivers without the hardware capability to support it. It was introduced in Linux 5.14: https://github.com/torvalds/linux/commit/7b7d2fdc8c3e3f9fdb3558d674e1eeddc16c7d9e It is now enabled in Debian: https://salsa.debian.org/kernel- team/linux/-/commit/d09d223632f0505c3a82dc77d6f70e120002a221 More information about watchdog pretimeouts: https://elinux.org/Tests:Watchdog-Pretimeout We are adding support for this feature in systemd: https://github.com/systemd/systemd/pull/19970 More specifically, if it was enabled in Jammy, we could add an upstream autopkgtest case using qemu to cover this functionality, which is not tested at all currently, when we rebase our autopkgtest image from Focal to Jammy. [Test Plan] To verify that this is working, simply boot Qemu with '-device i6300esb,id=watchdog0 -watchdog-action reset' then check the available governors: modprobe pretimeout_noop cat /sys/class/watchdog/watchdog0/pretimeout_available_governors [Where problems could occur] The feature is disabled by default, as the modules have to be manually loaded, so chance of side effects for general users is very low. ** Affects: linux (Ubuntu) Importance: Undecided Status: New -- 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/1961771 Title: Enable CONFIG_WATCHDOG_HRTIMER_PRETIMEOUT in Jammy Status in linux package in Ubuntu: New Bug description: [Impact] The CONFIG_WATCHDOG_HRTIMER_PRETIMEOUT option allows to support pretimeout actions on device drivers without the hardware capability to support it. It was introduced in Linux 5.14: https://github.com/torvalds/linux/commit/7b7d2fdc8c3e3f9fdb3558d674e1eeddc16c7d9e It is now enabled in Debian: https://salsa.debian.org/kernel- team/linux/-/commit/d09d223632f0505c3a82dc77d6f70e120002a221 More information about watchdog pretimeouts: https://elinux.org/Tests:Watchdog-Pretimeout We are adding support for this feature in systemd: https://github.com/systemd/systemd/pull/19970 More specifically, if it was enabled in Jammy, we could add an upstream autopkgtest case using qemu to cover this functionality, which is not tested at all currently, when we rebase our autopkgtest image from Focal to Jammy. [Test Plan] To verify that this is working, simply boot Qemu with '-device i6300esb,id=watchdog0 -watchdog-action reset' then check the available governors: modprobe pretimeout_noop cat /sys/class/watchdog/watchdog0/pretimeout_available_governors [Where problems could occur] The feature is disabled by default, as the modules have to be manually loaded, so chance of side effects for general users is very low. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1961771/+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
