I noticed this on upgrade from vanilla 6.14.3 to 6.14.4. 6.14.4 contains "eventpoll: Set epoll timeout if it's in the future"
There's a patch proposing a fix for an endless busy wait: https://git.kernel.org/pub/scm/linux/kernel/git/vfs/vfs.git/commit/?id=d9ec73301099 I'm going apply it to 6.14.7 and try it. -- 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/2110289 Title: snapd has high CPU usage for exactly 150 seconds every 5, 7.5 or 10 minutes Status in Go: New Status in Linux: New Status in snapd: Confirmed Status in linux package in Ubuntu: Confirmed Bug description: Since recently, I have observed a periodic high CPU spike on the snapd process. It first occurs 5 minutes after start of the snapd systemd service. It always lasts for exactly 150 seconds (2.5 minutes) and occurs every 5, 7.5 or 10 minutes. It maxes out a CPU core for the 150 seconds it is running. If you run `sudo snap refresh` while the CPU spike is occurring, the spike stops immediately. I have attached a CPU usage log which logs the CPU usage of the snapd process every 5 seconds. Some info about my system: snap --version: snap 2.68.4 snapd 2.68.4 series 16 ubuntu 22.04 kernel 6.14.5-1-liquorix-amd64 lsb_release -a: Distributor ID: Ubuntu Description: Ubuntu 22.04.5 LTS Release: 22.04 Codename: jammy uname -a: Linux schneeflocke 6.14.5-1-liquorix-amd64 #1 ZEN SMP PREEMPT_DYNAMIC liquorix 6.14-7ubuntu1~jammy (2025-05 x86_64 x86_64 x86_64 GNU/Linux Measurements: Spike Start - Spike End -> Total Time 12:25:26 - 12:22:56 -> 2:30 min 12:35:26 - 12:37:56 -> 2:30 min 12:40:26 - 12:42:56 -> 2:30 min 12:47:56 - 12:50:26 -> 2:30 min 12:52:56 - 12:55:26 -> 2:30 min What additional info can I provide to identify the problem? To manage notifications about this bug go to: https://bugs.launchpad.net/golang/+bug/2110289/+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
