On 11/27/25 12:38, Jon Hunter wrote: > > > On 31/10/2025 21:32, Daniel Gomez wrote: >> >> >> On 10/09/2025 10.01, Vlastimil Babka wrote: >> >> Hi Vlastimil, >> >> This patch increases kmod selftest (stress module loader) runtime by about >> ~50-60%, from ~200s to ~300s total execution time. My tested kernel has >> CONFIG_KVFREE_RCU_BATCHED enabled. Any idea or suggestions on what might be >> causing this, or how to address it? >> > > 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.
Do the tegra tests involve (frequent) module unloads too, then? Or calling kmem_cache_destroy() somewhere? Thanks, Vlastimil > I have not tried disabling CONFIG_KVFREE_RCU_BATCHED=y but I can. I am > not sure if there are any downsides to disabling this? > > Thanks > Jon >
