On Wed, Oct 09, 2024 at 02:44:30PM +0800, Oliver Sang wrote: [snip] > > > > I will look into this now, if I provide patches would you be able to test > > them using the same boxes? It'd be much appreciated! > > sure! that's our pleasure! > Hi Oliver, Thanks so much for this, could you give the below a try? I've not tried to seriously test it locally yet, so it'd be good to set your test machines on it. If this doesn't help it suggests call stack/branching might be a thing here in which case I have other approaches I can take before we have to duplicate this code. This patch is against the mm-unstable branch in Andrew's tree [0] but hopefully should apply fine to Linus's too. [0]:https://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm.git/ Thanks again! Best, Lorenzo ----8<----