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Groups > linux.kernel > #1177953 > unrolled thread
| Started by | Frederic Weisbecker <fweisbec@gmail.com> |
|---|---|
| First post | 2015-07-07 01:00 +0200 |
| Last post | 2015-07-07 01:00 +0200 |
| Articles | 1 — 1 participant |
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Re: [PATCH RESEND] nohz: Affining unpinned timers Frederic Weisbecker <fweisbec@gmail.com> - 2015-07-07 01:00 +0200
| From | Frederic Weisbecker <fweisbec@gmail.com> |
|---|---|
| Date | 2015-07-07 01:00 +0200 |
| Subject | Re: [PATCH RESEND] nohz: Affining unpinned timers |
| Message-ID | <pJnwK-5Vl-5@gated-at.bofh.it> |
On Mon, Jul 06, 2015 at 07:18:22PM +0200, Thomas Gleixner wrote: > On Mon, 6 Jul 2015, Frederic Weisbecker wrote: > > I hope everybody received the patch because there is a ";" after each address :-) > > > > On Tue, Jun 23, 2015 at 02:01:33PM +0530, Vatika Harlalka wrote: > > > The problem addressed in this patch is about affining unpinned timers. > > > Adaptive or Full Dynticks CPUs should not be disturbed by unnecessary > > > jitter due to firing of such timers on them. > > > This patch will affine timers to online CPUs which are not Full Dynticks > > > in FULL_NOHZ configured systems. It will not bring about functional > > > changes if NOHZ_FULL is not configured, because is_housekeeping_cpu() > > > always returns true in CONFIG_NO_HZ_FULL=n. > > > > > > Signed-off by: Vatika Harlalka <vatikaharlalka@gmail.com> > > > > The patch looks good to me. Peter, Thomas, are you ok with it too? > > By some definition of OK. The overhead of this is growing and growing. > > We really need to make this a pull not a push model. I'm currently working toward that. See "[PATCH 0/8] tick/nohz: Tick dependency quick check + cleanups" as a first step. Now for this very patch, I don't know how we could make it better. Any suggestion? > Thanks, > > tglx -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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