On Fri, 11 Aug 2017 17:01:30 +0200
Frederic Weisbecker wrote:
> > Personally, I think NOHZ_FULL_ALL should just die.
>
> Yeah, although it's still useful for automatic boot testing to detect issues
> with nohz_full on.
Maybe we could rename/modify it to be a boot-time testing option for
nohz_
On 8/11/2017 11:35 AM, Christopher Lameter wrote:
Ah, Chris since you are here: What is happening with the dataplane
patches?
Work has been crazy and I keep expecting to have a chunk of time to work
on it and it doesn't happen.
September is looking relatively good though for my having time to
On Fri, 11 Aug 2017, Chris Metcalf wrote:
> > > Maybe a CONFIG_HOUSEKEEPING_BOOT_ONLY as a way to restrict housekeeping
> > > by default to just the boot cpu. In conjunction with NOHZ_FULL_ALL you
> > > would
> > > then get the expected semantics.
> > A big box with only the boot cpu for housekee
On 8/11/2017 2:36 AM, Mike Galbraith wrote:
On Thu, 2017-08-10 at 09:57 -0400, Chris Metcalf wrote:
On 8/10/2017 8:54 AM, Frederic Weisbecker wrote:
But perhaps I should add a new NO_HZ_FULL_BUT_HOUSEKEEPING option.
Otherwise we'll change the meaning of NO_HZ_FULL_ALL way too much, to the point
On Fri, Aug 11, 2017 at 08:36:28AM +0200, Mike Galbraith wrote:
> On Thu, 2017-08-10 at 09:57 -0400, Chris Metcalf wrote:
> > On 8/10/2017 8:54 AM, Frederic Weisbecker wrote:
> > > But perhaps I should add a new NO_HZ_FULL_BUT_HOUSEKEEPING option.
> > > Otherwise we'll change the meaning of NO_HZ_F
On Thu, 2017-08-10 at 09:57 -0400, Chris Metcalf wrote:
> On 8/10/2017 8:54 AM, Frederic Weisbecker wrote:
> > But perhaps I should add a new NO_HZ_FULL_BUT_HOUSEKEEPING option.
> > Otherwise we'll change the meaning of NO_HZ_FULL_ALL way too much, to the
> > point
> > that its default behaviour w
On 8/10/2017 8:54 AM, Frederic Weisbecker wrote:
But perhaps I should add a new NO_HZ_FULL_BUT_HOUSEKEEPING option.
Otherwise we'll change the meaning of NO_HZ_FULL_ALL way too much, to the point
that its default behaviour will be the exact opposite of the current one: by
default
every CPU is ho
On Fri, Jul 21, 2017 at 03:48:16PM -0400, Chris Metcalf wrote:
> On 7/21/2017 9:21 AM, Frederic Weisbecker wrote:
> >I'm leaving for two weeks so this is food for thoughts in the meantime :)
> >
> >We have a design issue with nohz_full: it drives the isolation features
> >through the *housekeeping*
On 7/21/2017 9:21 AM, Frederic Weisbecker wrote:
I'm leaving for two weeks so this is food for thoughts in the meantime :)
We have a design issue with nohz_full: it drives the isolation features
through the *housekeeping*() functions: kthreads, unpinned timers,
watchdog, ...
But things should w
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