On Fri, Nov 28, 2025 at 08:57:28AM +0000, Jon Hunter wrote: > > On 27/11/2025 12:48, Harry Yoo wrote: > > ... > > > > > I have been looking into a regression for Linux v6.18-rc where time > > > > taken to > > > > run some internal graphics tests on our Tegra234 device has increased > > > > from > > > > around 35% causing the tests to timeout. Bisect is pointing to this > > > > commit > > > > and I also see we have CONFIG_KVFREE_RCU_BATCHED=y. > > > > > > Thanks for reporting! Uh, this has been put aside while I was busy working > > > on other stuff... but now that we have two people complaining about this, > > > I'll allocate some time to investigate and improve it. > > > > > > It'll take some time though :) > > > > By the way, how many CPUs do you have on your system, and does your > > kernel have CONFIG_CODE_TAGGING enabled? > > For this device there are 12 CPUs. I don't see CONFIG_CODE_TAGGING enabled.
Thanks! Then it's probably due to kmem_cache_destroy(). Please let me know this patch improves your test execution time. https://lore.kernel.org/linux-mm/[email protected]/ -- Cheers, Harry / Hyeonggon
