Nitesh Lal wrote: > @Jesse do you think the Part-1 findings explain the behavior that you have > observed in the past? > > Also, let me know if there are any suggestions or experiments to try here. Wow Nitesh, nice work! That's quite a bit of spelunking you had to do there! Your results that show the older kernels with ranged affinity issues is consistent with what I remember from that time, and the original problem. I'm glad to see that a) Thomas fixed the kernel to even do better than ranged affinity masks, and that b) if you revert my patch, the new behavior is better and still maintains the fix from a). For me this explains the whole picture and makes me feel comfortable with the patch that reverts the initial affinity mask (that also introduces a subtle bug with the reserved CPUs that I believe you've noted already). Thanks for this work! Jesse
