* Peter Zijlstra: > On Fri, Apr 05, 2019 at 12:16:39PM +0200, Florian Weimer wrote: > >> > True; but I suppose glibc already does lots of that anyway, right? It >> > does contain the right information. >> >> If I recall correctly my last investigation, >> /sys/devices/system/cpu/possible does not reflect the size of the >> affinity mask, either. > > Strictly speaking correct; the bitmap can be longer than the highest > possible cpu number, however the remainder would be 0-padding and could > thus be stripped without issue. Doesn't the kernel still enforce the larget bitmap in sched_getaffinity, even if the bits are always zero? Thanks, Florian
