On Thu, Apr 17, 2025 at 10:06:11AM -0700, Caleb Sander Mateos wrote: > Hi Linux NVMe folks, > On a 32 KB NVMe passthru read workload, we see 2.4% of CPU time is > spent in _raw_spin_lock_irqsave called from dma_pool_alloc and > dma_pool_free. Just curious, do you have multiple cpu NUMA nodes here? Or do these CPUs share a last-level-cache?