On 15/05/18 17:17, Peter Zijlstra wrote: <> >> >> So I would love some mm guy to explain where are those bits collected? > > Depends on the architecture, some architectures only ever set bits, > some, like x86, clear bits again. You want to look at switch_mm(). > > Basically x86 clears the bit again when we switch away from the mm and > have/will invalidate TLBs for it in doing so. > Ha, OK I am starting to get a picture. >> Which brings me to another question. How can I find from >> within a thread Say at the file_operations->mmap() call that the thread >> is indeed core-pinned. What mm_cpumask should I inspect? > > is_percpu_thread(). Right thank you a lot Peter. this helps. Boaz > . >
