questions for Linus

questions for Linus

[Mulyadi Santosa]

Hi Greg..

I came with these questions for Linus, hope you're kind enough to
collect it and forward it to Linus in LinuxCon:

1. When will Linux 2.8.x start? and what are the plans regarding the
development model? do we back in dual 2.4.x/2.5x era? personally I
think that model is nice.... makes one really know which tree to
follow when he needs stable one, or the devel one...

2. I saw task/process scheduler is one that under heavy concern
lately, take a look on "200 line patch that does wonder" for example.
I am thinking, we better really incorporate pluggable scheduler
framework, that enable us to change scheduling core algorithm on the
fly. What do you think?

3. I read somewhere that once Coverity helps Linux kernel developers
found out unseen bugs using sophisticated static code analysis. Is
that still happening now? Probably a good deal, squashing bugs in
nowadays kernel's size is pretty hard, I could say..

that's all for now Greg...thanks in advance...hopefully it's still make it..

-- 
regards,

Mulyadi Santosa
Freelance Linux trainer and consultant

blog: the-hydra.blogspot.com
training: mulyaditraining.blogspot.com

questions for Linus

[Stéphan Gorget]

On Tue, May 31, 2011 at 9:12 AM, Mulyadi Santosa
<mulyadi.santosa@gmail.com> wrote:
> Hi Greg..
>
> I came with these questions for Linus, hope you're kind enough to
> collect it and forward it to Linus in LinuxCon:
>
> 1. When will Linux 2.8.x start? and what are the plans regarding the
> development model? do we back in dual 2.4.x/2.5x era? personally I
> think that model is nice.... makes one really know which tree to
> follow when he needs stable one, or the devel one...

In fact Linux 2.8 won't be, it will be 3.0 : https://lkml.org/lkml/2011/5/29/204

>
> 2. I saw task/process scheduler is one that under heavy concern
> lately, take a look on "200 line patch that does wonder" for example.
> I am thinking, we better really incorporate pluggable scheduler
> framework, that enable us to change scheduling core algorithm on the
> fly. What do you think?
>
> 3. I read somewhere that once Coverity helps Linux kernel developers
> found out unseen bugs using sophisticated static code analysis. Is
> that still happening now? Probably a good deal, squashing bugs in
> nowadays kernel's size is pretty hard, I could say..
>
> that's all for now Greg...thanks in advance...hopefully it's still make it..
>
> --
> regards,
>
> Mulyadi Santosa
> Freelance Linux trainer and consultant
>
> blog: the-hydra.blogspot.com
> training: mulyaditraining.blogspot.com
>
> _______________________________________________
> Kernelnewbies mailing list
> Kernelnewbies at kernelnewbies.org
> http://lists.kernelnewbies.org/mailman/listinfo/kernelnewbies
>



-- 
St?phan

questions for Linus

[Mulyadi Santosa]

Hi..

On Tue, May 31, 2011 at 14:17, St?phan Gorget <phantez@gmail.com> wrote:
> On Tue, May 31, 2011 at 9:12 AM, Mulyadi Santosa
> <mulyadi.santosa@gmail.com> wrote:
>> Hi Greg..
>>
>> I came with these questions for Linus, hope you're kind enough to
>> collect it and forward it to Linus in LinuxCon:
>>
>> 1. When will Linux 2.8.x start? and what are the plans regarding the
>> development model? do we back in dual 2.4.x/2.5x era? personally I
>> think that model is nice.... makes one really know which tree to
>> follow when he needs stable one, or the devel one...
>
> In fact Linux 2.8 won't be, it will be 3.0 : https://lkml.org/lkml/2011/5/29/204

Oh crap...sorry, didn't notice that...thanks....

-- 
regards,

Mulyadi Santosa
Freelance Linux trainer and consultant

blog: the-hydra.blogspot.com
training: mulyaditraining.blogspot.com

questions for Linus

[Greg KH]

On Tue, May 31, 2011 at 02:12:36PM +0700, Mulyadi Santosa wrote:
> Hi Greg..
> 
> I came with these questions for Linus, hope you're kind enough to
> collect it and forward it to Linus in LinuxCon:
> 
> 1. When will Linux 2.8.x start? and what are the plans regarding the
> development model? do we back in dual 2.4.x/2.5x era? personally I
> think that model is nice.... makes one really know which tree to
> follow when he needs stable one, or the devel one...

This has been answered already.

> 2. I saw task/process scheduler is one that under heavy concern
> lately, take a look on "200 line patch that does wonder" for example.
> I am thinking, we better really incorporate pluggable scheduler
> framework, that enable us to change scheduling core algorithm on the
> fly. What do you think?

This has been covered many times by the scheduler developers already.
With cgroups, you can do lots of neat things already, no need to change
any kernel code.

> 3. I read somewhere that once Coverity helps Linux kernel developers
> found out unseen bugs using sophisticated static code analysis. Is
> that still happening now? Probably a good deal, squashing bugs in
> nowadays kernel's size is pretty hard, I could say..

I do not think Coverity is doing anything with the kernel anymore.  But
we have lots of other good code coverage tools that do static analysis
that people are using, and fixing bugs with today (sparse, coccinelle,
etc.)

But this is a good one, I'll try to work it into the questions, thanks,

greg k-h

questions for Linus

[Bernd Petrovitsch]

Hi!

On Die, 2011-05-31 at 14:12 +0700, Mulyadi Santosa wrote:
[...] 
> I came with these questions for Linus, hope you're kind enough to
> collect it and forward it to Linus in LinuxCon:

Well, just reads the announcement thread and you will find the answers
there.

> 1. When will Linux 2.8.x start? and what are the plans regarding the
> development model? do we back in dual 2.4.x/2.5x era? personally I

Perhaps we should fall back to the waterfall model from the early 70s?!
SCNR ....

> think that model is nice.... makes one really know which tree to
> follow when he needs stable one, or the devel one...

It is now much simpler - all are stable. Alas, as with all man made
stuff, some are more stable than others.

Bernd
-- 
Bernd Petrovitsch                  Email : bernd at petrovitsch.priv.at
                     LUGA : http://www.luga.at

questions for Linus

[Greg KH]

On Tue, May 31, 2011 at 02:12:36PM +0700, Mulyadi Santosa wrote:
> Hi Greg..
> 
> I came with these questions for Linus, hope you're kind enough to
> collect it and forward it to Linus in LinuxCon:

Thanks for all of the questions everyone, they helped out immensely and
the interview went well.

I think it will be posted online in video form soon, so check the linux
foundation web site for the link if you are interested.

greg k-h

questions for Linus

[Mulyadi Santosa]

On Wed, Jun 1, 2011 at 08:44, Greg KH <greg@kroah.com> wrote:
> I think it will be posted online in video form soon, so check the linux
> foundation web site for the link if you are interested.
>
> greg k-h
>

thanks a ton, Greg! Wow, hopefully I really got answer from Linus :)

-- 
regards,

Mulyadi Santosa
Freelance Linux trainer and consultant

blog: the-hydra.blogspot.com
training: mulyaditraining.blogspot.com

questions for Linus

[Pei Lin]

2011/5/31 Greg KH <greg@kroah.com>:
> On Tue, May 31, 2011 at 02:12:36PM +0700, Mulyadi Santosa wrote:
>> Hi Greg..
>>
>> I came with these questions for Linus, hope you're kind enough to
>> collect it and forward it to Linus in LinuxCon:
>>
>> 1. When will Linux 2.8.x start? and what are the plans regarding the
>> development model? do we back in dual 2.4.x/2.5x era? personally I
>> think that model is nice.... makes one really know which tree to
>> follow when he needs stable one, or the devel one...
>
> This has been answered already.
>
>> 2. I saw task/process scheduler is one that under heavy concern
>> lately, take a look on "200 line patch that does wonder" for example.
>> I am thinking, we better really incorporate pluggable scheduler
>> framework, that enable us to change scheduling core algorithm on the
>> fly. What do you think?
>
> This has been covered many times by the scheduler developers already.
> With cgroups, you can do lots of neat things already, no need to change
> any kernel code.
>


As the newbie, look at here, suddenly one thought rush in my brain.
After twenty years development, the kernel became bigger and bigger.
The cost time for building the kernel becomes much more.
If someone writes one new feature in kernel core, he maybe wants to
load the component directly into running kernel instead of rebuild the
kernel and reboot it.
Could the kernel support all components reloadable dynamically in core
as scheduler, memory management etc?
Now the driver subsystem is modularity, could kernel make everything
modularity and all things be hotplugged?
Even kernel can breakdown to little pieces which running on different
computers or terminals communicate with network or others.
Kernel can be one and more points connection. A little more crazy, :-)

Best Regards
-Lin

>> 3. I read somewhere that once Coverity helps Linux kernel developers
>> found out unseen bugs using sophisticated static code analysis. Is
>> that still happening now? Probably a good deal, squashing bugs in
>> nowadays kernel's size is pretty hard, I could say..
>
> I do not think Coverity is doing anything with the kernel anymore. ?But
> we have lots of other good code coverage tools that do static analysis
> that people are using, and fixing bugs with today (sparse, coccinelle,
> etc.)
>
> But this is a good one, I'll try to work it into the questions, thanks,
>
> greg k-h
>
> _______________________________________________
> Kernelnewbies mailing list
> Kernelnewbies at kernelnewbies.org
> http://lists.kernelnewbies.org/mailman/listinfo/kernelnewbies
>

questions for Linus

[Greg KH]

On Wed, Jun 01, 2011 at 10:32:55AM +0800, Pei Lin wrote:
> As the newbie, look at here, suddenly one thought rush in my brain.
> After twenty years development, the kernel became bigger and bigger.
> The cost time for building the kernel becomes much more.

Sure, more code that does more and more complex compilers means more
time to build the code.

> If someone writes one new feature in kernel core, he maybe wants to
> load the component directly into running kernel instead of rebuild the
> kernel and reboot it.
> Could the kernel support all components reloadable dynamically in core
> as scheduler, memory management etc?

We support modules already, just not for some core things, so you can do
this today.

> Now the driver subsystem is modularity, could kernel make everything
> modularity and all things be hotplugged?

Everything that can be physically hotplugged can be with Linux (i.e.
hardware).  We don't want to have different schedulers, but we do have
different i/o schedulers already that can be changed dynamically.  The
mm core does not make any sense to be a module though.

Hope this helps,

greg k-h

questions for Linus

[nilesh]

Hi Greg,

Included the list as the recipient.
On Wed, 2011-06-01 at 10:44 +0900, Greg KH wrote:
> On Tue, May 31, 2011 at 02:12:36PM +0700, Mulyadi Santosa wrote:
> > Hi Greg..
> > 
> > I came with these questions for Linus, hope you're kind enough to
> > collect it and forward it to Linus in LinuxCon:
> 
> Thanks for all of the questions everyone, they helped out immensely and
> the interview went well.
> 
> I think it will be posted online in video form soon, so check the linux
> foundation web site for the link if you are interested.
> 
Sorry if I got it wrong, but is the interview (in text form) or video
posted on linuxfoundation? Or is it yet to be done? I visited the site
and I do not see that.

> greg k-h
> 

-- 
Thanks,
Nilesh

questions for Linus

[Greg KH]

On Wed, Jun 01, 2011 at 12:10:45PM +0530, nilesh wrote:
> Hi Greg,
> 
> Included the list as the recipient.
> On Wed, 2011-06-01 at 10:44 +0900, Greg KH wrote:
> > On Tue, May 31, 2011 at 02:12:36PM +0700, Mulyadi Santosa wrote:
> > > Hi Greg..
> > > 
> > > I came with these questions for Linus, hope you're kind enough to
> > > collect it and forward it to Linus in LinuxCon:
> > 
> > Thanks for all of the questions everyone, they helped out immensely and
> > the interview went well.
> > 
> > I think it will be posted online in video form soon, so check the linux
> > foundation web site for the link if you are interested.
> > 
> Sorry if I got it wrong, but is the interview (in text form) or video
> posted on linuxfoundation? Or is it yet to be done? I visited the site
> and I do not see that.

It just happened a few hours ago, so I think it might be a week or so
before the video is posted to the web site.  I'll ask the orginizers and
try to find out when it will show up.

I'm sure there will be some news reports of the talk in a few days as
well, there were lots of fun quotes that I'm sure will be repeated, they
are already all over twitter in places...

thanks,

greg k-h

questions for Linus

[nilesh]

On Wed, 2011-06-01 at 16:02 +0900, Greg KH wrote:
> On Wed, Jun 01, 2011 at 12:10:45PM +0530, nilesh wrote:
[...]
> 
> It just happened a few hours ago, so I think it might be a week or so
> before the video is posted to the web site.  I'll ask the orginizers and
> try to find out when it will show up.
> 
Ok. Thanks a lot.

> I'm sure there will be some news reports of the talk in a few days as
> well, there were lots of fun quotes that I'm sure will be repeated, they
> are already all over twitter in places...
> 
> thanks,
> 
> greg k-h


-- 
Thanks,
Nilesh

questions for Linus

[Javier Martinez Canillas]

> It just happened a few hours ago, so I think it might be a week or so
> before the video is posted to the web site. ?I'll ask the orginizers and
> try to find out when it will show up.
>
> I'm sure there will be some news reports of the talk in a few days as
> well, there were lots of fun quotes that I'm sure will be repeated, they
> are already all over twitter in places...
>

In case that someone didn't notice there is a lwn.net coverage of the interview:

http://lwn.net/Articles/445687/

Best regards,

-- 
Javier Mart?nez Canillas
(+34) 682 39 81 69
PhD Student in High Performance Computing
Computer Architecture and Operating System Department (CAOS)
Universitat Aut?noma de Barcelona
Barcelona, Spain

questions for Linus

[nilesh]

On Wed, 2011-06-01 at 12:51 +0530, nilesh wrote:
> On Wed, 2011-06-01 at 16:02 +0900, Greg KH wrote:
> > On Wed, Jun 01, 2011 at 12:10:45PM +0530, nilesh wrote:
> [...]
> > 
> > It just happened a few hours ago, so I think it might be a week or so
> > before the video is posted to the web site.  I'll ask the orginizers and
> > try to find out when it will show up.
> > 
> Ok. Thanks a lot.
> 
I just noticed the interview is now available on youtube also, in case
someone missed it.
http://www.youtube.com/watch?v=__fALdvvcM0

> > I'm sure there will be some news reports of the talk in a few days as
> > well, there were lots of fun quotes that I'm sure will be repeated, they
> > are already all over twitter in places...
> > 
> > thanks,
> > 
> > greg k-h


-- 
Thanks,
Nilesh