On 2016年06月07日 17:13, Borislav Petkov wrote:
On Tue, Jun 07, 2016 at 04:44:24PM +0800, Chen Yu wrote:
I'm doing more test to verify this.
I think it would be better if you looked into doing HLT as Brian
suggested, instead of touching any memory during s/r.
OK, I'll also test this solution.
On Tue, Jun 07, 2016 at 04:44:24PM +0800, Chen Yu wrote:
> I'm doing more test to verify this.
I think it would be better if you looked into doing HLT as Brian
suggested, instead of touching any memory during s/r.
--
Regards/Gruss,
Boris.
SUSE Linux GmbH, GF: Felix Imendörffer, Jane Smithar
Hi Pavel,
On 2016年06月07日 16:03, Pavel Machek wrote:
On Mon 2016-06-06 22:19:09, Chen Yu wrote:
Stress test from Varun Koyyalagunta reports that, the
nonboot CPU would hang occasionally, when resuming from
hibernation. Further investigation shows that, the precise
phase when nonboot CPU hangs, i
On Mon 2016-06-06 22:19:09, Chen Yu wrote:
> Stress test from Varun Koyyalagunta reports that, the
> nonboot CPU would hang occasionally, when resuming from
> hibernation. Further investigation shows that, the precise
> phase when nonboot CPU hangs, is the time when the nonboot
> CPU been woken up
On 06/06/16 09:40, Peter Zijlstra wrote:
> On Mon, Jun 06, 2016 at 03:59:06PM +, Chen, Yu C wrote:
>
+ if (hibernation_in_resume())
+ mwait_ptr = empty_zero_page;
+ else
+ mwait_ptr = ¤t_thread_info()->flags;
>>>
>>> Why is this conditional? Is there any
On Mon, Jun 6, 2016 at 12:40 PM, Peter Zijlstra wrote:
> On Mon, Jun 06, 2016 at 03:59:06PM +, Chen, Yu C wrote:
>
>> > > + if (hibernation_in_resume())
>> > > + mwait_ptr = empty_zero_page;
>> > > + else
>> > > + mwait_ptr = ¤t_thread_info()->flags;
>> >
>> > Why is this condi
On Mon, Jun 06, 2016 at 03:59:06PM +, Chen, Yu C wrote:
> > > + if (hibernation_in_resume())
> > > + mwait_ptr = empty_zero_page;
> > > + else
> > > + mwait_ptr = ¤t_thread_info()->flags;
> >
> > Why is this conditional? Is there any case in which the zero page is not
> > als
Rafael J . Wysocki; Pavel
> Machek; Brown, Len; Borislav Petkov; Zhu Guihua; Juergen Gross
> Subject: Re: [PATCH][RFC] x86, hotplug: Use zero page for monitor when
> resuming from hibernation
>
> On Mon, Jun 06, 2016 at 10:19:09PM +0800, Chen Yu wrote:
> > @@ -1595,8 +1596,21 @@
On Mon, Jun 06, 2016 at 10:19:09PM +0800, Chen Yu wrote:
> @@ -1595,8 +1596,21 @@ static inline void mwait_play_dead(void)
>* This should be a memory location in a cache line which is
>* unlikely to be touched by other processors. The actual
>* content is immaterial as it i
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