Re: [PATCH 0/4] Allow CPU0 to be nohz full

2019-04-12 Thread Paul E. McKenney
On Fri, Apr 12, 2019 at 01:16:01PM +1000, Nicholas Piggin wrote: > Paul E. McKenney's on April 12, 2019 1:42 am: > > On Tue, Apr 09, 2019 at 07:21:54PM +1000, Nicholas Piggin wrote: > >> Thomas Gleixner's on April 6, 2019 3:54 am: > >> > On Fri, 5 Apr 2019, Nicholas Piggin wrote: > >> >> Thomas

Re: [PATCH 0/4] Allow CPU0 to be nohz full

2019-04-11 Thread Nicholas Piggin
Paul E. McKenney's on April 12, 2019 1:42 am: > On Tue, Apr 09, 2019 at 07:21:54PM +1000, Nicholas Piggin wrote: >> Thomas Gleixner's on April 6, 2019 3:54 am: >> > On Fri, 5 Apr 2019, Nicholas Piggin wrote: >> >> Thomas Gleixner's on April 5, 2019 12:36 am: >> >> > On Thu, 4 Apr 2019, Nicholas

Re: [PATCH 0/4] Allow CPU0 to be nohz full

2019-04-11 Thread Paul E. McKenney
On Tue, Apr 09, 2019 at 07:21:54PM +1000, Nicholas Piggin wrote: > Thomas Gleixner's on April 6, 2019 3:54 am: > > On Fri, 5 Apr 2019, Nicholas Piggin wrote: > >> Thomas Gleixner's on April 5, 2019 12:36 am: > >> > On Thu, 4 Apr 2019, Nicholas Piggin wrote: > >> > > >> >> I've been looking at

Re: [PATCH 0/4] Allow CPU0 to be nohz full

2019-04-09 Thread Nicholas Piggin
Thomas Gleixner's on April 6, 2019 3:54 am: > On Fri, 5 Apr 2019, Nicholas Piggin wrote: >> Thomas Gleixner's on April 5, 2019 12:36 am: >> > On Thu, 4 Apr 2019, Nicholas Piggin wrote: >> > >> >> I've been looking at ways to fix suspend breakage with CPU0 as a >> >> nohz CPU. I started looking at

Re: [PATCH 0/4] Allow CPU0 to be nohz full

2019-04-05 Thread Thomas Gleixner
On Fri, 5 Apr 2019, Nicholas Piggin wrote: > Thomas Gleixner's on April 5, 2019 12:36 am: > > On Thu, 4 Apr 2019, Nicholas Piggin wrote: > > > >> I've been looking at ways to fix suspend breakage with CPU0 as a > >> nohz CPU. I started looking at various things like allowing CPU0 > >> to take

Re: [PATCH 0/4] Allow CPU0 to be nohz full

2019-04-04 Thread Nicholas Piggin
Thomas Gleixner's on April 5, 2019 12:36 am: > On Thu, 4 Apr 2019, Nicholas Piggin wrote: > >> I've been looking at ways to fix suspend breakage with CPU0 as a >> nohz CPU. I started looking at various things like allowing CPU0 >> to take over do_timer again temporarily or allowing nohz full >>

Re: [PATCH 0/4] Allow CPU0 to be nohz full

2019-04-04 Thread Thomas Gleixner
On Thu, 4 Apr 2019, Nicholas Piggin wrote: > I've been looking at ways to fix suspend breakage with CPU0 as a > nohz CPU. I started looking at various things like allowing CPU0 > to take over do_timer again temporarily or allowing nohz full > to be stopped at runtime (that is quite a significant

[PATCH 0/4] Allow CPU0 to be nohz full

2019-04-04 Thread Nicholas Piggin
I've been looking at ways to fix suspend breakage with CPU0 as a nohz CPU. I started looking at various things like allowing CPU0 to take over do_timer again temporarily or allowing nohz full to be stopped at runtime (that is quite a significant change for little real benefit). The problem then