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-- You received this bug notification because you are a member of Ubuntu Touch seeded packages, which is subscribed to systemd in Ubuntu. https://bugs.launchpad.net/bugs/1876018 Title: 40-vm-hotadd.rules attempts to set non-existent sysfs parameters Status in systemd package in Ubuntu: Fix Released Status in systemd source package in Xenial: In Progress Status in systemd source package in Bionic: In Progress Status in systemd source package in Focal: Fix Released Bug description: [impact] 40-vm-hotadd.rules unconditionally tries onlining memory, which results in logged error messages if the memory is already online [test case] since this rules file restricts operation to only hyper-v or xen guests, boot a hyper-v or xen vm guest, and check for logged error msgs like: Apr 29 22:36:46 focal01 systemd-udevd[266]: memory7: /usr/lib/udev/rules.d/40-vm-hotadd.rules:9 Failed to write ATTR{/sys/devices/system/memory/memory7/state}, ignoring: Invalid argument alternately, to test on a vm guest other than hyper-v or xen, comment/remove the 'GOTO="vm_hotadd_end"' line from the rules file and reboot. [regression potential] as this adds a check before attempting to online memory for hyper-v and xen vm guests, any regression would likely involve failure to correctly online all memory on those guest platforms. [scope] this rule has been around for a long time, so is needed for x/b/f/g. [original description] In focal, udev's 40-vm-hotadd.rules (from debian/extra/rules-ubuntu) tries to write to invalid (as of 5.4.0-1010-azure) sysfs nodes resulting in warnings such as: Apr 29 22:36:46 focal01 systemd-udevd[266]: memory7: /usr/lib/udev/rules.d/40-vm-hotadd.rules:9 Failed to write ATTR{/sys/devices/system/memory/memory7/state}, ignoring: Invalid argument Perhaps 40-vm-hotadd.rules needs to be updated for 5.4 semantics, removed, or something else. This behavior is present on systems upgraded from 18.04 (via d-r-u) as well as new focal systems, upon first reboot of the VM. udev: 245.4-4ubuntu3 To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/systemd/+bug/1876018/+subscriptions -- Mailing list: https://launchpad.net/~touch-packages Post to : touch-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~touch-packages More help : https://help.launchpad.net/ListHelp
