How to discover new Linux features (was: Re: Linux 2.6.16-rc1)

How to discover new Linux features (was: Re: Linux 2.6.16-rc1)

[Chuck Ebbert]

In-Reply-To: <20060117183916.399b030f.diegocg@gmail.com>

On Tue, 17 Jan 2006, Diego Calleja wrote:

> Can I ask if it's possible to "mark" new features/important changes?
> 
> I've maintaining http://wiki.kernelnewbies.org/LinuxChanges
> for three releases and the amount of changes is so big it takes hours 
> to extract the relevant changes,

 One way to find new features is to use "make oldconfig".

 Say you are comparing kernels 2.6.14 and 2.6.15, trying to see what
is new.  Just do this:

 1.  Copy a .config file into your 2.6.14 directory.

 2.  Run "make oldconfig" there.  It doesn't really matter what
     answers you give so long as it runs to completion.

 3.  Copy that .config file to your 2.6.15 directory.

 4.  When you run "make oldconfig" all of the new features, drivers
     etc. will cause a prompt.

 5.  There will be some false positives if options have been renamed
     or moved around, but it's generally accurate.

-- 
Chuck
Currently reading: _Noise_ by Hal Clement

Re: How to discover new Linux features (was: Re: Linux 2.6.16-rc1)

[Alex Riesen]

On 1/19/06, Chuck Ebbert <76306.1226@compuserve.com> wrote:
>  Say you are comparing kernels 2.6.14 and 2.6.15, trying to see what
> is new.  Just do this:
>
>  1.  Copy a .config file into your 2.6.14 directory.
>
>  2.  Run "make oldconfig" there.  It doesn't really matter what
>      answers you give so long as it runs to completion.

make it "make allconfig"

Re: How to discover new Linux features (was: Re: Linux 2.6.16-rc1)

[Randy.Dunlap]

On Tue, 24 Jan 2006, Alex Riesen wrote:

> On 1/19/06, Chuck Ebbert <76306.1226@compuserve.com> wrote:
> >  Say you are comparing kernels 2.6.14 and 2.6.15, trying to see what
> > is new.  Just do this:
> >
> >  1.  Copy a .config file into your 2.6.14 directory.
> >
> >  2.  Run "make oldconfig" there.  It doesn't really matter what
> >      answers you give so long as it runs to completion.
>
> make it "make allconfig"

Are you suggesting a new make target?  'make help' lists
allyesconfig, allnoconfig, or allmodconfig (in the all* group).

-- 
~Randy

Re: How to discover new Linux features (was: Re: Linux 2.6.16-rc1)

[Alex Riesen]

Randy.Dunlap, Tue, Jan 24, 2006 16:13:37 +0100:
> > >  Say you are comparing kernels 2.6.14 and 2.6.15, trying to see what
> > > is new.  Just do this:
> > >
> > >  1.  Copy a .config file into your 2.6.14 directory.
> > >
> > >  2.  Run "make oldconfig" there.  It doesn't really matter what
> > >      answers you give so long as it runs to completion.
> >
> > make it "make allconfig"
> 
> Are you suggesting a new make target?  'make help' lists
> allyesconfig, allnoconfig, or allmodconfig (in the all* group).
> 

...! allyesconfig, of course.