I hit this problem 'rcp_preemp detected expedited stalls on CPUs/tasks' today. When it appears, ssh breaks and any command can not be run. After upgrading the kernel to a version larger than 5.15.0-60.66 (it's 5.15.0-74-generic now), the problem disappeared.
-- 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/1991951 Title: RCU stalls Status in linux package in Ubuntu: Fix Released Status in linux source package in Jammy: Fix Released Bug description: our RCU Stall Timeouts are different to upstream defaults; with regular one 3x longer; and expedited one 1000x shorter. not sure why. Let's harmonize on 60 & 0, which is 60 for regular ones that are set on most architectures; and upstream default for the expedited ones. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1991951/+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
