Re: [RFC v2 PATCH 0/16] Optimize this_cpu_*() ops for non-x86 (ARM64 for this series)
"David Hildenbrand (Arm)" <[email protected]>
| Newsgroups | org.infradead.lists.linux-arm-kernel,org.kernel.vger.linux-kernel,org.kvack.linux-mm |
|---|---|
| Message-ID | <[email protected]> |
On 8/4/26 23:56, Christoph Lameter (Ampere) wrote: > On Tue, 4 Aug 2026, David Hildenbrand (Arm) wrote: > >>> These are operations that are key to the performance in critical parts of >>> memory management and this code is replicated by being inlined thousands >>> of times in the kernel. >> >> Cool, then it is easy to show the difference by running micro + macro benchmarks. > > And we have done so repeatedly. Look at Yang's posts. > I'm getting tired of this. So to be clear: claiming that the additional instructions are unacceptable I'd expect something minimal like: "removing these 3 instructions speeds up micro-benchmark (a, b, c) by X% and macro-benchmarks (d, e, f) by Y% compared to Mark's approach". [1] https://lore.kernel.org/r/[email protected] -- Cheers, David