On Tue, Feb 18, 2020 at 03:35:25PM -0600, Kim Phillips wrote:
The only reason to have it show in /proc/cpuinfo is for userspace, but they can check for a nonzero count prior to using, instead.
How is userspace going to check it? perf tool or people *can* check it? If perf is going to check it then I'm fine with having the bug bit in /proc/cpuinfo along with a patch for perf adding usage for it.
If not and people in userspace can maybe check it but they probably won't then adding that bug bit would be a waste of bit.
Let me know if you'd like me to send a v4, or if you will just apply this version of yours.
I can take the simpler version for now. If you still want to have perf tool check the bit, you could submit a new patch adding that bug bit along with a perf tool patch using it...