On Mon 2021-03-29 8:45, Rafael J. Wysocki wrote:
> On Fri, Mar 26, 2021 at 11:53 PM Zhou Ti (x2019cwm) wrote:
> >
> > On Fri, 26 Mar 2021 19:54:26 +0100, Rafael J. Wysocki wrote:
> > > On Fri, Mar 26, 2021 at 6:53 PM Zhou Ti (x2019cwm)
> > > wrote:
> > > >
> > > > On Fri, 26 Mar 2021 18:01:47
On Fri, Mar 26, 2021 at 11:53 PM Zhou Ti (x2019cwm) wrote:
>
> On Fri, 26 Mar 2021 19:54:26 +0100, Rafael J. Wysocki wrote:
> > On Fri, Mar 26, 2021 at 6:53 PM Zhou Ti (x2019cwm) wrote:
> > >
> > > On Fri, 26 Mar 2021 18:01:47 +0100, Rafael J. Wysocki wrote:
> > > > On Thu, Mar 25, 2021 at 9:37
On Fri, 26 Mar 2021 19:54:26 +0100, Rafael J. Wysocki wrote:
> On Fri, Mar 26, 2021 at 6:53 PM Zhou Ti (x2019cwm) wrote:
> >
> > On Fri, 26 Mar 2021 18:01:47 +0100, Rafael J. Wysocki wrote:
> > > On Thu, Mar 25, 2021 at 9:37 PM Zhou Ti (x2019cwm)
> > > wrote:
> > > >
> > > > On March 25, 2021
On Fri, Mar 26, 2021 at 6:53 PM Zhou Ti (x2019cwm) wrote:
>
> On Fri, 26 Mar 2021 18:01:47 +0100, Rafael J. Wysocki wrote:
> > On Thu, Mar 25, 2021 at 9:37 PM Zhou Ti (x2019cwm) wrote:
> > >
> > > On March 25, 2021 15:50, Rafael J. Wysocki wrote:
> > > > On Thu, Mar 25, 2021 at 8:18 PM Zhou Ti
y understand
> > how much of a burden adding an extra branch would impose, so I don't know if
> > this tradeoff is worth it.
>
> It ultimately depends on the governor, which is why I think that the
> negative value check should be done by the governor, if needed, and
> not by
On Thu, Mar 25, 2021 at 9:37 PM Zhou Ti (x2019cwm) wrote:
>
> On March 25, 2021 15:50, Rafael J. Wysocki wrote:
> > On Thu, Mar 25, 2021 at 8:18 PM Zhou Ti (x2019cwm) wrote:
> > >
> > > On March 25, 2021 14:56, Rafael J. Wysocki wrote:
> > > > On Thursday, March 25, 2021 2:14:00 PM CET Frederic
On March 25, 2021 15:50, Rafael J. Wysocki wrote:
> On Thu, Mar 25, 2021 at 8:18 PM Zhou Ti (x2019cwm) wrote:
> >
> > On March 25, 2021 14:56, Rafael J. Wysocki wrote:
> > > On Thursday, March 25, 2021 2:14:00 PM CET Frederic Weisbecker wrote:
> > > > On Tue, Mar 16, 2021 at 04:08:08PM +,
On Thu, Mar 25, 2021 at 8:18 PM Zhou Ti (x2019cwm) wrote:
>
> On March 25, 2021 14:56, Rafael J. Wysocki wrote:
> > On Thursday, March 25, 2021 2:14:00 PM CET Frederic Weisbecker wrote:
> > > On Tue, Mar 16, 2021 at 04:08:08PM +, Zhou Ti (x2019cwm) wrote:
> > > > But I don't think it's a good
On March 25, 2021 14:56, Rafael J. Wysocki wrote:
> On Thursday, March 25, 2021 2:14:00 PM CET Frederic Weisbecker wrote:
> > On Tue, Mar 16, 2021 at 04:08:08PM +, Zhou Ti (x2019cwm) wrote:
> > > But I don't think it's a good idea to handle this in callers, because
> > > logically the
On Thursday, March 25, 2021 2:14:00 PM CET Frederic Weisbecker wrote:
> On Tue, Mar 16, 2021 at 04:08:08PM +, Zhou Ti (x2019cwm) wrote:
> > But I don't think it's a good idea to handle this in callers, because
> > logically the function shouldn't return negative values. Returning 0
> >
On Tue, Mar 16, 2021 at 04:08:08PM +, Zhou Ti (x2019cwm) wrote:
> But I don't think it's a good idea to handle this in callers, because
> logically the function shouldn't return negative values. Returning 0 directly
> would allow idle governors to get another chance to select again.
Hmm,
On March 16, 2021 12:25, Peter Zijlstra wrote:
>On Tue, Mar 16, 2021 at 04:08:08PM +, Zhou Ti (x2019cwm) wrote:
>> But I don't think it's a good idea to handle this in callers, because
>> logically the function shouldn't return negative values. Returning 0
>> directly would allow idle
On Tue, Mar 16, 2021 at 04:08:08PM +, Zhou Ti (x2019cwm) wrote:
> But I don't think it's a good idea to handle this in callers, because
> logically the function shouldn't return negative values. Returning 0
> directly would allow idle governors to get another chance to select
> again.
A:
日 3:57
收件人: Rafael J. Wysocki; Frederic Weisbecker; Peter Zijlstra
抄送: Thomas Gleixner; LKML; Yunfeng Ye; Paul E . McKenney; Marcelo Tosatti; Ingo
Molnar; raf...@kernel.org
主题: 回复: [PATCH 01/10] tick/nohz: Prevent tick_nohz_get_sleep_length() from
returning negative value
Yes, the return
Yes, the return of a negative number results in a very large unsigned integer,
which idle governors use as a baseline prediction for future interrupts and to
correct their own parameters. This problem can lead to the selection of idle
states that are too deep, which can be detrimental to both
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