On Tue, Jan 21, 2014 at 08:31:05AM -0500, Prarit Bhargava wrote:
>> So ... I think this should be rejected or reverted.
>
> OK. Have a link to where these problems cropped up?
Not yet Josh -- I'm still gathering reports. Here's basically what I have so
far (I'm bogged down with a few things and this isn't critical so it has lower
priority).
We're seeing some large systems that should properly support cpu0 hotplug report
back that they do not. I'm not sure why, other than I believe that some of the
init code may not properly recognize cpu0 hotplug flags. I've also seen some
systems that should not have booted with cpu0 hotplug claim to support it ... so
something is broken :( ... I'm just not sure what.
FWIW, I requested a revert in RHEL7 for this, and QA reported that the revert
fixed some other issues with perf.
OK, thanks for the info. I did the revert yesterday and it should be in
the 3.13.0-1.fc21 build.
josh