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NUMA has been disabled for the past few years and no-one has noticed
Backport candidate, Requires assessmentPublicBUG


As I was doing some performance load tests, I discovered that somehow all the NUMA configuration was removed accidentally from the kernel build toolset! This means that any memory hungry things (conntrack, I'm looking at you) was significantly throttled.

Pull request attached which re-enables it, and also enables kexec so we can potentially enable fast reboots.


Difficulty level
Easy (less than an hour)
Why the issue appeared?
Will be filled on close
Is it a breaking change?
Perfectly compatible

Event Timeline

That was generated by running make defconfig, enabling numa, and saving it back. BUILD_BIN2C is related to kexec.

c-po changed the task status from Open to Needs testing.Apr 25 2021, 8:05 PM
c-po assigned this task to xrobau.
c-po changed the task status from Needs testing to Backport candidate.Apr 27 2021, 6:14 AM