Re: PM regression in next
On Thu, 11 Jan 2018 16:23:22 -0800 Tony Lindgren <tony@xxxxxxxxxxx> wrote:
> * Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx> [180112 00:18]:
> > On Thu, 11 Jan 2018 16:01:13 -0800 Tony Lindgren <tony@xxxxxxxxxxx> wrote:
> > > Hi all,
> > >
> > > I'm seeing a considerable idle power consumption regression in
> > > Linux next, with power consumption for my idle test system going
> > > to 17.5mW compared to the usual 8mW on my test device.
> > >
> > > Git bisect points to merge commit e130bc1d00a4 ("Merge branch
> > > 'akpm-current/current'") being the first bad commit.
> > >
> > > I have also verified that commit 70286688e5ad ("ipc/mqueue.c:
> > > have RT tasks queue in by priority in wq_add()") is good, and
> > > commit e2d7fe89e8ae ("Merge remote-tracking branch
> > > 'init_task/init_task'") is good.
> > Do you mean that everything up to and including 70286688e5ad
> > ("ipc/mqueue.c: have RT tasks queue in by priority in wq_add()") is
> > good?
> Yes I'm not seeing the regression in your branch at commit
> 70286688e5ad. I'm seeing it only with the merge commit
That's weird. All I'm seeing between 70286688e5ad and end-of-mm is:
And I don't see how any of those can cause this. Did anything else
change, like context switch rates, interrupt rates, etc?