Hi Willy,
On Tue, Sep 19, 2023 at 3:01 PM Matthew Wilcox wrote:
> On Tue, Sep 19, 2023 at 02:30:59PM +0200, Thomas Gleixner wrote:
> > Though it just occured to me that there are dragons lurking:
> >
> > arch/alpha/Kconfig: select ARCH_NO_PREEMPT
> > arch/hexagon/Kconfig: select ARCH_NO_PRE
On Tue, Sep 19, 2023, at 10:16, Peter Zijlstra wrote:
> On Tue, Sep 19, 2023 at 03:48:09PM +0200, John Paul Adrian Glaubitz wrote:
>> On Tue, 2023-09-19 at 15:42 +0200, Peter Zijlstra wrote:
>> > > The agreement to kill off ia64 wasn't an invitation to kill off other
>> > > stuff
>> > > that peopl
On 19/09/2023 15:16, Peter Zijlstra wrote:
On Tue, Sep 19, 2023 at 03:48:09PM +0200, John Paul Adrian Glaubitz wrote:
On Tue, 2023-09-19 at 15:42 +0200, Peter Zijlstra wrote:
The agreement to kill off ia64 wasn't an invitation to kill off other stuff
that people are still working on! Can we
From: Linus Torvalds
> Sent: 19 September 2023 18:25
>
> On Tue, 19 Sept 2023 at 06:48, John Paul Adrian Glaubitz
> wrote:
> >
> > As Geert poined out, I'm not seeing anything particular problematic with the
> > architectures lacking CONFIG_PREEMPT at the moment. This seems to be more
> > somethi
On Tue, Sep 19 2023 at 10:25, Linus Torvalds wrote:
> PeterZ mentioned the generic entry code, which does this for the entry
> path. But it actually goes much deeper: just do a
>
> git grep preempt_disable arch/x86/kernel
>
> and then do the same for some other architectures.
>
> Looking at alp
* Steven Rostedt wrote:
> On Tue, 19 Sep 2023 20:31:50 +0200
> Thomas Gleixner wrote:
>
> > The removal of cond_resched() might cause latencies, but then I doubt
> > that these museus pieces are used for real work :)
>
> We could simply leave the cond_resched() around but defined as nops for
* Thomas Gleixner wrote:
> On Tue, Sep 19 2023 at 10:25, Linus Torvalds wrote:
> > On Tue, 19 Sept 2023 at 06:48, John Paul Adrian Glaubitz
> > wrote:
> >>
> >> As Geert poined out, I'm not seeing anything particular problematic with
> >> the
> >> architectures lacking CONFIG_PREEMPT at the m
On Tue, Sep 19 2023 at 11:52, Linus Torvalds wrote:
> On Tue, 19 Sept 2023 at 11:37, Steven Rostedt wrote:
>>
>> We could simply leave the cond_resched() around but defined as nops for
>> everything but the "nostalgia club" to keep them from having any regressions.
>
> I doubt the nostalgia club c
On Tue, 19 Sept 2023 at 11:37, Steven Rostedt wrote:
>
> We could simply leave the cond_resched() around but defined as nops for
> everything but the "nostalgia club" to keep them from having any regressions.
I doubt the nostalgia club cares about some latencies (that are
usually only noticeable
On Tue, 19 Sep 2023 20:31:50 +0200
Thomas Gleixner wrote:
> The removal of cond_resched() might cause latencies, but then I doubt
> that these museus pieces are used for real work :)
We could simply leave the cond_resched() around but defined as nops for
everything but the "nostalgia club" to ke
On Tue, Sep 19 2023 at 10:25, Linus Torvalds wrote:
> On Tue, 19 Sept 2023 at 06:48, John Paul Adrian Glaubitz
> wrote:
>>
>> As Geert poined out, I'm not seeing anything particular problematic with the
>> architectures lacking CONFIG_PREEMPT at the moment. This seems to be more
>> something about
Hi Linus!
On Tue, 2023-09-19 at 10:25 -0700, Linus Torvalds wrote:
> On Tue, 19 Sept 2023 at 06:48, John Paul Adrian Glaubitz
> wrote:
> >
> > As Geert poined out, I'm not seeing anything particular problematic with the
> > architectures lacking CONFIG_PREEMPT at the moment. This seems to be mor
On Tue, Sep 19 2023 at 17:41, Anton Ivanov wrote:
> On 19/09/2023 17:22, Richard Weinberger wrote:
>> - Ursprüngliche Mail -
>>> Von: "anton ivanov"
>>> It's been a while. I remember that I dropped it at the time, but do not
>>> remember
>>> the full details.
>>>
>>> There was some stuff
On Tue, 19 Sept 2023 at 06:48, John Paul Adrian Glaubitz
wrote:
>
> As Geert poined out, I'm not seeing anything particular problematic with the
> architectures lacking CONFIG_PREEMPT at the moment. This seems to be more
> something about organizing KConfig files.
It can definitely be problematic
On 19/09/2023 17:22, Richard Weinberger wrote:
- Ursprüngliche Mail -
Von: "anton ivanov"
It's been a while. I remember that I dropped it at the time, but do not remember
the full details.
There was some stuff related to FP state and a few other issues I ran into while
rewriting the
- Ursprüngliche Mail -
> Von: "anton ivanov"
> It's been a while. I remember that I dropped it at the time, but do not
> remember
> the full details.
>
> There was some stuff related to FP state and a few other issues I ran into
> while
> rewriting the interrupt controller. Some of it m
On Tue, 19 Sep 2023 15:32:05 +0100
Matthew Wilcox wrote:
> On Tue, Sep 19, 2023 at 04:24:48PM +0200, John Paul Adrian Glaubitz wrote:
> > If the conversion isn't hard, why is the first reflex the urge to remove an
> > architecture
> > instead of offering advise how to get the conversion done?
On 19/09/2023 16:17, Thomas Gleixner wrote:
On Tue, Sep 19 2023 at 15:21, Anton Ivanov wrote:
On 19/09/2023 14:42, Peter Zijlstra wrote:
If you're working on one of them, then surely it's a simple matter of
working on adding CONFIG_PREEMPT support :-)
In the case of UML adding preempt will b
On Tue, Sep 19 2023 at 15:21, Anton Ivanov wrote:
> On 19/09/2023 14:42, Peter Zijlstra wrote:
>> If you're working on one of them, then surely it's a simple matter of
>> working on adding CONFIG_PREEMPT support :-)
>
> In the case of UML adding preempt will be quite difficult. I looked at
> this a
On Tue, Sep 19, 2023 at 10:51 AM H. Peter Anvin wrote:
>
> On September 19, 2023 7:17:04 AM PDT, Thomas Gleixner
> wrote:
> >On Tue, Sep 19 2023 at 15:48, John Paul Adrian Glaubitz wrote:
> >> On Tue, 2023-09-19 at 15:42 +0200, Peter Zijlstra wrote:
> >>> > The agreement to kill off ia64 wasn't
On September 19, 2023 7:17:04 AM PDT, Thomas Gleixner
wrote:
>On Tue, Sep 19 2023 at 15:48, John Paul Adrian Glaubitz wrote:
>> On Tue, 2023-09-19 at 15:42 +0200, Peter Zijlstra wrote:
>>> > The agreement to kill off ia64 wasn't an invitation to kill off other
>>> > stuff
>>> > that people are s
On 19/09/2023 14:42, Peter Zijlstra wrote:
On Tue, Sep 19, 2023 at 03:37:24PM +0200, John Paul Adrian Glaubitz wrote:
On Tue, 2023-09-19 at 14:00 +0100, Matthew Wilcox wrote:
On Tue, Sep 19, 2023 at 02:30:59PM +0200, Thomas Gleixner wrote:
Though it just occured to me that there are dragons
On Tue, Sep 19, 2023 at 04:24:48PM +0200, John Paul Adrian Glaubitz wrote:
> If the conversion isn't hard, why is the first reflex the urge to remove an
> architecture
> instead of offering advise how to get the conversion done?
Because PREEMPT has been around since before 2005 (cc19ca86a023 crea
On Tue, 2023-09-19 at 16:16 +0200, Peter Zijlstra wrote:
> > I find it a bit unfair that maintainers of architectures that have huge
> > companies
> > behind them use their manpower to urge less popular architectures for
> > removal just
> > because they don't have 150 people working on the port
On Tue, Sep 19 2023 at 15:48, John Paul Adrian Glaubitz wrote:
> On Tue, 2023-09-19 at 15:42 +0200, Peter Zijlstra wrote:
>> > The agreement to kill off ia64 wasn't an invitation to kill off other stuff
>> > that people are still working on! Can we please not do this?
>>
>> If you're working on on
On Tue, Sep 19, 2023 at 03:48:09PM +0200, John Paul Adrian Glaubitz wrote:
> On Tue, 2023-09-19 at 15:42 +0200, Peter Zijlstra wrote:
> > > The agreement to kill off ia64 wasn't an invitation to kill off other
> > > stuff
> > > that people are still working on! Can we please not do this?
> >
> >
On Tue, 2023-09-19 at 15:42 +0200, Peter Zijlstra wrote:
> > The agreement to kill off ia64 wasn't an invitation to kill off other stuff
> > that people are still working on! Can we please not do this?
>
> If you're working on one of them, then surely it's a simple matter of
> working on adding CO
On Tue, Sep 19, 2023 at 03:37:24PM +0200, John Paul Adrian Glaubitz wrote:
> On Tue, 2023-09-19 at 14:00 +0100, Matthew Wilcox wrote:
> > On Tue, Sep 19, 2023 at 02:30:59PM +0200, Thomas Gleixner wrote:
> > > Though it just occured to me that there are dragons lurking:
> > >
> > > arch/alpha/Kconf
On Tue, 2023-09-19 at 14:00 +0100, Matthew Wilcox wrote:
> On Tue, Sep 19, 2023 at 02:30:59PM +0200, Thomas Gleixner wrote:
> > Though it just occured to me that there are dragons lurking:
> >
> > arch/alpha/Kconfig: select ARCH_NO_PREEMPT
> > arch/hexagon/Kconfig: select ARCH_NO_PREEMPT
> >
Hi Willy,
On Tue, Sep 19, 2023 at 3:01 PM Matthew Wilcox wrote:
> On Tue, Sep 19, 2023 at 02:30:59PM +0200, Thomas Gleixner wrote:
> > Though it just occured to me that there are dragons lurking:
> >
> > arch/alpha/Kconfig: select ARCH_NO_PREEMPT
> > arch/hexagon/Kconfig: select ARCH_NO_PRE
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