I filed two bug reports upstream: https://bugzilla.kernel.org/show_bug.cgi?id=172991 https://bugzilla.kernel.org/show_bug.cgi?id=172981
I also made a kernel 4.8-rc8 with 81ae6d03 reverted (because it is so trivial to revert) and no matter how hard I beat on it I can not get it to mess up. ** Bug watch added: Linux Kernel Bug Tracker #172991 http://bugzilla.kernel.org/show_bug.cgi?id=172991 ** Bug watch added: Linux Kernel Bug Tracker #172981 http://bugzilla.kernel.org/show_bug.cgi?id=172981 -- 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/1626564 Title: 4.8 regression: SLAB is being used instead of SLUB Status in linux package in Ubuntu: Fix Released Status in linux source package in Yakkety: Fix Released Bug description: We're seeing hundreds of kernel worker threads being spawned with some actions, for example, after booting the desktop and hutting the brightness keys causes this. On investigation, this occurs when CONFIG_SLAB is being used. 1. Ubuntu traditionally uses CONFIG_SLUB, so we should use that instead of CONFIG_SLAB (why was it changed for Yakkety?) 2. With CONFIG_SLUB I cannot reproduce the issue of the hundreds for worker threads 3 CONFIG_SLUB seems more performant on the boot too over SLAB. Please re-enable the CONFIG_SLUB allocator as per the 4.4. Xenial configs. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1626564/+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
