Re: [GIT pull] CPU hotplug updates for 4.9

From: Thomas Gleixner
Date: Wed Mar 08 2017 - 04:43:59 EST


On Tue, 7 Mar 2017, Bart Van Assche wrote:
> On Tue, 2017-03-07 at 10:30 +0100, Thomas Gleixner wrote:
> > That's odd. There was no change related to the hotplug stuff post 4.10
> > neither in the core nor in that particular driver.
> >
> > I have no immediate clue what to look for aside of asking you whether you
> > could do a bisect between 4.10 and 4.11-rc1.
> I will keep trying to find the commit that introduced this behavior. The
> bisect I ran this morning yielded a commit that only changes ARM code which
> does not make sense since I ran the bisect on an x86 system. I guess that
> means that during one of the bisect steps I did not wait long enough to see
> whether or not the hang occurs and hence that I provided incorrect input to
> the bisect process.

Before you proceed with bisecting, could you try Linus head first,
especially commit:

fa3aa7a54fe6 ("jiffies: Revert bogus conversion of NSEC_PER_SEC to TICK_NSEC")

which fixes: 93825f2ec736 ("jiffies: Reuse TICK_NSEC instead of NSEC_PER_JIFFY")