Re: [PATCH] [443/2many] MAINTAINERS - HIBERNATION (aka Software Suspend, aka swsusp):

Re: [PATCH] [443/2many] MAINTAINERS - HIBERNATION (aka Software Suspend, aka swsusp):

[Pavel Machek]

> Add file pattern to MAINTAINER entry
> 
> Signed-off-by: Joe Perches <joe@perches.com>

ACK.
								Pavel


-- 
(english) http://www.livejournal.com/~pavelmachek
(cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html

Re: [PATCH] [443/2many] MAINTAINERS - HIBERNATION (aka Software Suspend, aka swsusp):

[Rafael J. Wysocki]

On Monday, 13 August 2007 08:36, joe@perches.com wrote:
> Add file pattern to MAINTAINER entry
> 
> Signed-off-by: Joe Perches <joe@perches.com>
> 
> diff --git a/MAINTAINERS b/MAINTAINERS
> index 29a2179..5ae90a2 100644
> --- a/MAINTAINERS
> +++ b/MAINTAINERS
> @@ -4215,6 +4215,9 @@ P:	Rafael J. Wysocki
>  M:	rjw@sisk.pl
>  L:	linux-pm@lists.linux-foundation.org
>  S:	Supported
> +F:	Documentation/power/swsusp*
> +F:	arch/i386/power/swsusp.S
> +F:	kernel/power/

Well, the list isn't complete.  Please add

arch/i386/power/
arch/x86_64/kernel/suspend_asm.S
arch/x86_64/kernel/suspend.c
drivers/base/power/

There also is a couple of headers.  Do you want to list them too?

>  
>  SUSPEND TO RAM:
>  P:	Pavel Machek
> 
> 

Greetings,
Rafael

-- 
"Premature optimization is the root of all evil." - Donald Knuth

Re: [PATCH] [443/2many] MAINTAINERS - HIBERNATION (aka Software Suspend, aka swsusp):

[Joe Perches]

On Mon, 2007-08-13 at 22:50 +0200, Rafael J. Wysocki wrote:
> Please add
> arch/i386/power/
> arch/x86_64/kernel/suspend_asm.S
> arch/x86_64/kernel/suspend.c
> drivers/base/power/
> There also is a couple of headers.  Do you want to list them too?

Your choice.  Just let me know.

HIBERNATION (aka Software Suspend, aka swsusp):
P:	Pavel Machek
M:	pavel@suse.cz
P:	Rafael J. Wysocki
M:	rjw@sisk.pl
L:	linux-pm@lists.linux-foundation.org
S:	Supported
F:	Documentation/power/swsusp*
F:	arch/i386/power/
F:	arch/x86_64/kernel/suspend*
F:	drivers/base/power/
F:	kernel/power/

Re: [PATCH] [443/2many] MAINTAINERS - HIBERNATION (aka Software Suspend, aka swsusp):

[Joe Perches]

On Mon, 2007-08-13 at 23:25 +0200, Rafael J. Wysocki wrote:
> + include/linux/suspend.h
> + include/linux/freezer.h
> + include/linux/pm.h
> + include/asm-*/suspend.h
> 
> Hm, they are also relevant for suspend to RAM, so perhaps one common
> list of files for suspend to RAM and hibernation would be better?

Maybe just collapse the 2 maintainers blocks into one?

HIBERNATION (aka Software Suspend, aka swsusp) and SUSPEND TO RAM:
P:	Pavel Machek
M:	pavel@suse.cz
P:	Rafael J. Wysocki
M:	rjw@sisk.pl
L:	linux-pm@lists.linux-foundation.org
S:	Supported
F:	Documentation/power/swsusp*
F:	arch/i386/kernel/acpi/
F:	arch/i386/power/
F:	arch/x86_64/kernel/acpi/
F:	arch/x86_64/kernel/suspend_asm.S
F:	arch/x86_64/kernel/suspend.c
F:	drivers/base/power/
F:	kernel/power/
F:	include/linux/suspend.h
F:	include/linux/freezer.h
F:	include/linux/pm.h
F:	include/asm-*/suspend.h

Re: [PATCH] [443/2many] MAINTAINERS - HIBERNATION (aka Software Suspend, aka swsusp):

[Rafael J. Wysocki]

On Monday, 13 August 2007 23:21, Joe Perches wrote:
> On Mon, 2007-08-13 at 23:25 +0200, Rafael J. Wysocki wrote:
> > + include/linux/suspend.h
> > + include/linux/freezer.h
> > + include/linux/pm.h
> > + include/asm-*/suspend.h
> > 
> > Hm, they are also relevant for suspend to RAM, so perhaps one common
> > list of files for suspend to RAM and hibernation would be better?
> 
> Maybe just collapse the 2 maintainers blocks into one?
> 
> HIBERNATION (aka Software Suspend, aka swsusp) and SUSPEND TO RAM:
> P:	Pavel Machek
> M:	pavel@suse.cz
> P:	Rafael J. Wysocki
> M:	rjw@sisk.pl
> L:	linux-pm@lists.linux-foundation.org
> S:	Supported

Then I think it should be "Maintained".

> F:	Documentation/power/swsusp*

F: Documentation/power/

> F:	arch/i386/kernel/acpi/
> F:	arch/i386/power/
> F:	arch/x86_64/kernel/acpi/
> F:	arch/x86_64/kernel/suspend_asm.S
> F:	arch/x86_64/kernel/suspend.c
> F:	drivers/base/power/
> F:	kernel/power/
> F:	include/linux/suspend.h
> F:	include/linux/freezer.h
> F:	include/linux/pm.h
> F:	include/asm-*/suspend.h

Pavel, what do you think?


-- 
"Premature optimization is the root of all evil." - Donald Knuth

Re: [PATCH] [443/2many] MAINTAINERS - HIBERNATION (aka Software Suspend, aka swsusp):

[Pavel Machek]

Hi!

> > > + include/linux/suspend.h
> > > + include/linux/freezer.h
> > > + include/linux/pm.h
> > > + include/asm-*/suspend.h
> > > 
> > > Hm, they are also relevant for suspend to RAM, so perhaps one common
> > > list of files for suspend to RAM and hibernation would be better?
> > 
> > Maybe just collapse the 2 maintainers blocks into one?

No, please don't.

> > HIBERNATION (aka Software Suspend, aka swsusp) and SUSPEND TO RAM:
> > P:	Pavel Machek
> > M:	pavel@suse.cz
> > P:	Rafael J. Wysocki
> > M:	rjw@sisk.pl
> > L:	linux-pm@lists.linux-foundation.org
> > S:	Supported
> 
> Then I think it should be "Maintained".

No, supported is still right :-).
								Pavel
-- 
(english) http://www.livejournal.com/~pavelmachek
(cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html

Re: [PATCH] [443/2many] MAINTAINERS - HIBERNATION (aka Software Suspend, aka swsusp):

[Rafael J. Wysocki]

On Tuesday, 14 August 2007 09:05, Pavel Machek wrote:
> Hi!
> 
> > > > + include/linux/suspend.h
> > > > + include/linux/freezer.h
> > > > + include/linux/pm.h
> > > > + include/asm-*/suspend.h
> > > > 
> > > > Hm, they are also relevant for suspend to RAM, so perhaps one common
> > > > list of files for suspend to RAM and hibernation would be better?
> > > 
> > > Maybe just collapse the 2 maintainers blocks into one?
> 
> No, please don't.

So, I think the F: entries should be the following:

(1) hibernation
F:      Documentation/power/
F:      arch/i386/power/
F:      arch/x86_64/kernel/suspend_asm.S
F:      arch/x86_64/kernel/suspend.c
F:      drivers/base/power/
F:      kernel/power/
F:      include/linux/suspend.h
F:      include/linux/freezer.h
F:      include/linux/pm.h
F:      include/asm-*/suspend.h

(2) suspend
F:      Documentation/power/
F:      arch/i386/kernel/acpi/
F:      arch/x86_64/kernel/acpi/
F:      arch/x86_64/kernel/suspend.c
F:      drivers/base/power/
F:      kernel/power/
F:      include/linux/suspend.h
F:      include/linux/freezer.h
F:      include/linux/pm.h
F:      include/asm-*/suspend.h

> > > HIBERNATION (aka Software Suspend, aka swsusp) and SUSPEND TO RAM:
> > > P:	Pavel Machek
> > > M:	pavel@suse.cz
> > > P:	Rafael J. Wysocki
> > > M:	rjw@sisk.pl
> > > L:	linux-pm@lists.linux-foundation.org
> > > S:	Supported
> > 
> > Then I think it should be "Maintained".
> 
> No, supported is still right :-).

OK

Greetings,
Rafael

Re: [PATCH] [443/2many] MAINTAINERS - HIBERNATION (aka Software Suspend, aka swsusp):

[Joe Perches]

On Tue, 2007-08-14 at 19:37 +0200, Rafael J. Wysocki wrote:
> (1) hibernation
> F:      Documentation/power/
> F:      arch/i386/power/
> F:      arch/x86_64/kernel/suspend_asm.S
> F:      arch/x86_64/kernel/suspend.c
> F:      drivers/base/power/
> F:      kernel/power/
> F:      include/linux/suspend.h
> F:      include/linux/freezer.h
> F:      include/linux/pm.h
> F:      include/asm-*/suspend.h
> 
> (2) suspend
> F:      Documentation/power/
> F:      arch/i386/kernel/acpi/
> F:      arch/x86_64/kernel/acpi/
> F:      arch/x86_64/kernel/suspend.c
> F:      drivers/base/power/
> F:      kernel/power/
> F:      include/linux/suspend.h
> F:      include/linux/freezer.h
> F:      include/linux/pm.h
> F:      include/asm-*/suspend.h

SUSPEND TO RAM:
P:	Pavel Machek
M:	pavel@suse.cz
P:	Rafael J. Wysocki
M:	rjw@sisk.pl
L:	linux-pm@lists.linux-foundation.org
S:	Maintained
F:	Documentation/power/
F:	arch/i386/kernel/acpi/
F:	arch/x86_64/kernel/acpi/
F:	arch/x86_64/kernel/suspend.c
F:	drivers/base/power/
F:	kernel/power/
F:	include/linux/suspend.h
F:	include/linux/freezer.h
F:	include/linux/pm.h
F:	include/asm-*/suspend.h

HIBERNATION (aka Software Suspend, aka swsusp)
P:	Pavel Machek
M:	pavel@suse.cz
P:	Rafael J. Wysocki
M:	rjw@sisk.pl
L:	linux-pm@lists.linux-foundation.org
S:	Supported
F:	Documentation/power/
F:	arch/i386/power/
F:	arch/x86_64/kernel/suspend_asm.S
F:	arch/x86_64/kernel/suspend.c
F:	drivers/base/power/
F:	kernel/power/
F:	include/linux/suspend.h
F:	include/linux/freezer.h
F:	include/linux/pm.h
F:	include/asm-*/suspend.h

Re: [PATCH] [443/2many] MAINTAINERS - HIBERNATION (aka Software Suspend, aka swsusp):

[Rafael J. Wysocki]

On Tuesday, 14 August 2007 19:57, Joe Perches wrote:
> On Tue, 2007-08-14 at 19:37 +0200, Rafael J. Wysocki wrote:
> > (1) hibernation
> > F:      Documentation/power/
> > F:      arch/i386/power/
> > F:      arch/x86_64/kernel/suspend_asm.S
> > F:      arch/x86_64/kernel/suspend.c
> > F:      drivers/base/power/
> > F:      kernel/power/
> > F:      include/linux/suspend.h
> > F:      include/linux/freezer.h
> > F:      include/linux/pm.h
> > F:      include/asm-*/suspend.h
> > 
> > (2) suspend
> > F:      Documentation/power/
> > F:      arch/i386/kernel/acpi/
> > F:      arch/x86_64/kernel/acpi/
> > F:      arch/x86_64/kernel/suspend.c
> > F:      drivers/base/power/
> > F:      kernel/power/
> > F:      include/linux/suspend.h
> > F:      include/linux/freezer.h
> > F:      include/linux/pm.h
> > F:      include/asm-*/suspend.h
> 
> SUSPEND TO RAM:
> P:	Pavel Machek
> M:	pavel@suse.cz
> P:	Rafael J. Wysocki
> M:	rjw@sisk.pl
> L:	linux-pm@lists.linux-foundation.org
> S:	Maintained
> F:	Documentation/power/
> F:	arch/i386/kernel/acpi/
> F:	arch/x86_64/kernel/acpi/
> F:	arch/x86_64/kernel/suspend.c
> F:	drivers/base/power/
> F:	kernel/power/
> F:	include/linux/suspend.h
> F:	include/linux/freezer.h
> F:	include/linux/pm.h
> F:	include/asm-*/suspend.h
> 
> HIBERNATION (aka Software Suspend, aka swsusp)
> P:	Pavel Machek
> M:	pavel@suse.cz
> P:	Rafael J. Wysocki
> M:	rjw@sisk.pl
> L:	linux-pm@lists.linux-foundation.org
> S:	Supported
> F:	Documentation/power/
> F:	arch/i386/power/
> F:	arch/x86_64/kernel/suspend_asm.S
> F:	arch/x86_64/kernel/suspend.c
> F:	drivers/base/power/
> F:	kernel/power/
> F:	include/linux/suspend.h
> F:	include/linux/freezer.h
> F:	include/linux/pm.h
> F:	include/asm-*/suspend.h

ACK

Re: [PATCH] [443/2many] MAINTAINERS - HIBERNATION (aka Software Suspend, aka swsusp):

[Linus Torvalds]

On Tue, 14 Aug 2007, Joe Perches wrote:
>
> SUSPEND TO RAM:
> P:	Pavel Machek
> M:	pavel@suse.cz
> P:	Rafael J. Wysocki
> M:	rjw@sisk.pl
> L:	linux-pm@lists.linux-foundation.org
> S:	Maintained
> F:	Documentation/power/
> F:	arch/i386/kernel/acpi/
> F:	arch/x86_64/kernel/acpi/
> F:	arch/x86_64/kernel/suspend.c
> F:	drivers/base/power/
> F:	kernel/power/
> F:	include/linux/suspend.h
> F:	include/linux/freezer.h
> F:	include/linux/pm.h
> F:	include/asm-*/suspend.h

Quite frankly, I think the MAINTAINERS file gets a whole lot uglier this 
way.

There's also a rather fundamental issue: this will likely make people 
touch the MAINTAINERS file *more*, and from a maintenance standpoint, that 
is exactly the wrong thing to have (one central file that everybody 
touches). It just tends to generate unnecessary merge conflicts etc. 

(We used to have that issue with the central configuration file, for 
example).

So the more I look at these things, the more convinced I am that this is 
not the right thing to do. These things should *not* be in one huge file, 
and I'd much much rather have the maintainership information be carried 
along with the subsystem itself, or the files it contains.

In other words, it would be much better to just have per-file markers, 
along with some per-subdirectory stuff or similar.

			Linus

Re: [PATCH] [443/2many] MAINTAINERS - HIBERNATION (aka Software Suspend, aka swsusp):

[Andrew Morton]

On Tue, 14 Aug 2007 11:15:41 -0700 (PDT)
Linus Torvalds <torvalds@linux-foundation.org> wrote:

> In other words, it would be much better to just have per-file markers, 
> along with some per-subdirectory stuff or similar.

And a `make maintainers' target to pull it all together..

(perhaps we could add a

	maintainer <keyword>

record to Kconfig, then `make maintainers' goes and looks up <keyword>
somewhere and does something with it)

Re: [PATCH] [443/2many] MAINTAINERS - HIBERNATION (aka Software Suspend, aka swsusp):

[Rene Herman]

On 08/14/2007 08:15 PM, Linus Torvalds wrote:

> Quite frankly, I think the MAINTAINERS file gets a whole lot uglier this 
> way.
> 
> There's also a rather fundamental issue: this will likely make people 
> touch the MAINTAINERS file *more*, and from a maintenance standpoint, that 
> is exactly the wrong thing to have (one central file that everybody 
> touches). It just tends to generate unnecessary merge conflicts etc. 
> 
> (We used to have that issue with the central configuration file, for 
> example).
> 
> So the more I look at these things, the more convinced I am that this is 
> not the right thing to do. These things should *not* be in one huge file, 
> and I'd much much rather have the maintainership information be carried 
> along with the subsystem itself, or the files it contains.
> 
> In other words, it would be much better to just have per-file markers, 
> along with some per-subdirectory stuff or similar.

Joe just now convinced me that rather than the per-file markers, the marker 
is meta-information that could just be stored in GIT, with the MAINTAINERS 
file turning into something generated.

git info --maintainer and such (for many possible kinds of --flags) would 
throw out the information.

Rene.

Re: [PATCH] [443/2many] MAINTAINERS - HIBERNATION (aka Software Suspend, aka swsusp):

[Joe Perches]

On Tue, 2007-08-14 at 11:15 -0700, Linus Torvalds wrote:
> Quite frankly, I think the MAINTAINERS file gets a whole lot uglier this 
> way.

Me too.
Chopping up the current file is simple.

How about keeping the whole thing in git?
Please look at thread:
[PATCH] [1/2many] - Find the maintainer(s) for a patch - scripts/get_maintainer.pl

> In other words, it would be much better to just have per-file markers, 
> along with some per-subdirectory stuff or similar.

Perhaps a single top-level MAINTAINERS subdirectory with
500+ files or MAINTAINERS per subdirectory.

Doesn't matter to me.

I'd prefer no per-file external markers,
nor embedded per-file keywords.

Re: [PATCH] [443/2many] MAINTAINERS - HIBERNATION (aka Software Suspend, aka swsusp):

[Dave Jones]

On Tue, Aug 14, 2007 at 11:22:37AM -0700, Andrew Morton wrote:
 > On Tue, 14 Aug 2007 11:15:41 -0700 (PDT)
 > Linus Torvalds <torvalds@linux-foundation.org> wrote:
 > 
 > > In other words, it would be much better to just have per-file markers, 
 > > along with some per-subdirectory stuff or similar.
 > 
 > And a `make maintainers' target to pull it all together..
 > 
 > (perhaps we could add a
 > 
 > 	maintainer <keyword>
 > 
 > record to Kconfig, then `make maintainers' goes and looks up <keyword>
 > somewhere and does something with it)

Not everything that's in MAINTAINERS has a Kconfig entry though,
so it really needs to live in the .c/.h files.

	Dave


-- 
http://www.codemonkey.org.uk

Re: [PATCH] [443/2many] MAINTAINERS - HIBERNATION (aka Software Suspend, aka swsusp):

[Kyle Moffett]

On Aug 14, 2007, at 19:24:30, Dave Jones wrote:
> On Tue, Aug 14, 2007 at 11:22:37AM -0700, Andrew Morton wrote:
>> On Tue, 14 Aug 2007 11:15:41 -0700 (PDT) Linus Torvalds  
>> <torvalds@linux-foundation.org> wrote:
>>> In other words, it would be much better to just have per-file  
>>> markers, along with some per-subdirectory stuff or similar.
>>
>> And a `make maintainers' target to pull it all together..
>>
>> (perhaps we could add a
>>
>> 	maintainer <keyword>
>>
>> record to Kconfig, then `make maintainers' goes and looks up  
>> <keyword> somewhere and does something with it)
>
> Not everything that's in MAINTAINERS has a Kconfig entry though, so  
> it really needs to live in the .c/.h files.

How about making "MAINTAINERS" operate vaguely similar  
to .gitignore?  You would need 4 pieces

(a)  A set of "Maintainers" files sprinkled around the source tree  
where they make sense.  Any file references would be done using  
relative paths and patterns.  For example, there would be one in the  
root directory which has:

[EVERYTHING ELSE]
P: Various Linux Kernel Developers
L: linux-kernel@vger.kernel.org
F: *


Then (using the earlier SUSPEND TO RAM example) in the kernel/power/ 
Maintainers file, you would have:

[SUSPEND TO RAM]
P: Pavel Machek
M: pavel@suse.cz
P: Rafael J. Wysocki
M: rjw@sisk.pl
L: linux-pm@lists.linux-foundation.org
S: Maintained
F: *


Now that at least *one* of the maintainers files has the info for  
Pavel and Rafael, you could just use this simpler form in any other  
Maintainers file and still have it find their entries:

[SUSPEND TO RAM]
F: linux/suspend.h
F: linux/freezer.h
F: linux/pm.h
F: asm-*/suspend.h


(b)  You would need a little tool which generates a combined  
MAINTAINERS file when "make maintainers" is run.  It would iterate  
over the directory tree and combine entries with the same names.   
This also allows you to group people with their associated files even  
if they work on the same subsystem/driver; they would be listed in  
the respective sub-Maintainer-files, but when built it would mention  
both of them.  The intent would not be a MAINTAINERS file which is  
perfectly human-readable, it would be one which can be efficiently  
grepped by a helper tool to find the necessary information.  When the  
resulting MAINTAINERS file is built it would include the source  
"Maintainers" file for each chunk right before said chunk, for example:

[SUSPEND TO RAM]

Origin: kernel/power/Maintainers
P: Pavel Machek
M: pavel@suse.cz
P: Rafael J. Wysocki
M: rjw@sisk.pl
L: linux-pm@lists.linux-foundation.org
S: Maintained
F: kernel/power/*

Origin: include/Maintainers
F: include/linux/suspend.h
F: include/linux/freezer.h
F: include/linux/pm.h
F: include/asm-*/suspend.h



(c)  You would need a tool to go digging through the built  
MAINTAINERS file based on a file, an email address, a subsystem-name- 
regexp, etc.  It would return all matching entries, with the desired  
fields user-selectable.


(d)  You would need a little tool to poke at git similar to the shell  
script Linus posted which dug through the recent commit history  
looking for people doing significant *original* modifications (IE:  
first person to sign-off) on code for which they aren't a maintainer,  
as well as "Maintainers" who haven't recently signed off at all on  
code for which they are responsible.  The output might be something  
like this:

> ## Historical significance: 6 months
> ## Uncategorized file threshold: >10 changes or >20 sign-offs
> ## New maintainer threshold: >20 changes or >40 sign-offs
> ## Neglectful-maintainer threshold: <5 changes and <10 sign-offs
>
> [SUSPEND TO RAM]
> Nigel Cunningham should probably be a maintainer:
>   kernel/power/* (130 changes, 132 sign-offs)
>   include/linux/suspend.h (29 changes, 29 sign-offs)
>
> [RANDOM UNMAINTAINED DRIVER]
> J. Random Hacker has neglected his maintainership:
>   drivers/random/unmaintained.c (0 changes, 0 sign-offs)
>
> [UNCATEGORIZED]
> John Linville should probably add/update a Maintainers entry:
>   drivers/wireless/newly_added_driver.c (142 changes and 453 sign- 
> offs)


Hopefully that kind of tool would make it a hundred times easier to  
keep an eye out for out-dated entries as well as missing new  
entries.  The obsolescence-verification would be based on the rapidly- 
moving git changelog, so it would pick up new maintainers quite  
quickly, as well as noticing uncategorized source files and  
neglectful maintainers.

Soon as I get moved into my new place I'll see what kind of Perl  
scripts I can hack up


Cheers,
Kyle Moffett

Re: [PATCH] [443/2many] MAINTAINERS - HIBERNATION (aka Software Suspend, aka swsusp):

[Rafael J. Wysocki]

On Wednesday, 15 August 2007 04:51, Kyle Moffett wrote:
> On Aug 14, 2007, at 19:24:30, Dave Jones wrote:
> > On Tue, Aug 14, 2007 at 11:22:37AM -0700, Andrew Morton wrote:
> >> On Tue, 14 Aug 2007 11:15:41 -0700 (PDT) Linus Torvalds  
> >> <torvalds@linux-foundation.org> wrote:
> >>> In other words, it would be much better to just have per-file  
> >>> markers, along with some per-subdirectory stuff or similar.
> >>
> >> And a `make maintainers' target to pull it all together..
> >>
> >> (perhaps we could add a
> >>
> >> 	maintainer <keyword>
> >>
> >> record to Kconfig, then `make maintainers' goes and looks up  
> >> <keyword> somewhere and does something with it)
> >
> > Not everything that's in MAINTAINERS has a Kconfig entry though, so  
> > it really needs to live in the .c/.h files.
> 
> How about making "MAINTAINERS" operate vaguely similar  
> to .gitignore?  You would need 4 pieces
> 
> (a)  A set of "Maintainers" files sprinkled around the source tree  
> where they make sense.  Any file references would be done using  
> relative paths and patterns.  For example, there would be one in the  
> root directory which has:
> 
> [EVERYTHING ELSE]
> P: Various Linux Kernel Developers
> L: linux-kernel@vger.kernel.org
> F: *
> 
> 
> Then (using the earlier SUSPEND TO RAM example) in the kernel/power/ 
> Maintainers file, you would have:
> 
> [SUSPEND TO RAM]
> P: Pavel Machek
> M: pavel@suse.cz
> P: Rafael J. Wysocki
> M: rjw@sisk.pl
> L: linux-pm@lists.linux-foundation.org
> S: Maintained
> F: *
> 
> 
> Now that at least *one* of the maintainers files has the info for  
> Pavel and Rafael, you could just use this simpler form in any other  
> Maintainers file and still have it find their entries:
> 
> [SUSPEND TO RAM]
> F: linux/suspend.h
> F: linux/freezer.h
> F: linux/pm.h
> F: asm-*/suspend.h
> 
> 
> (b)  You would need a little tool which generates a combined  
> MAINTAINERS file when "make maintainers" is run.  It would iterate  
> over the directory tree and combine entries with the same names.   
> This also allows you to group people with their associated files even  
> if they work on the same subsystem/driver; they would be listed in  
> the respective sub-Maintainer-files, but when built it would mention  
> both of them.  The intent would not be a MAINTAINERS file which is  
> perfectly human-readable, it would be one which can be efficiently  
> grepped by a helper tool to find the necessary information.  When the  
> resulting MAINTAINERS file is built it would include the source  
> "Maintainers" file for each chunk right before said chunk, for example:
> 
> [SUSPEND TO RAM]
> 
> Origin: kernel/power/Maintainers
> P: Pavel Machek
> M: pavel@suse.cz
> P: Rafael J. Wysocki
> M: rjw@sisk.pl
> L: linux-pm@lists.linux-foundation.org
> S: Maintained
> F: kernel/power/*
> 
> Origin: include/Maintainers
> F: include/linux/suspend.h
> F: include/linux/freezer.h
> F: include/linux/pm.h
> F: include/asm-*/suspend.h
> 
> 
> 
> (c)  You would need a tool to go digging through the built  
> MAINTAINERS file based on a file, an email address, a subsystem-name- 
> regexp, etc.  It would return all matching entries, with the desired  
> fields user-selectable.
> 
> 
> (d)  You would need a little tool to poke at git similar to the shell  
> script Linus posted which dug through the recent commit history  
> looking for people doing significant *original* modifications (IE:  
> first person to sign-off) on code for which they aren't a maintainer,  
> as well as "Maintainers" who haven't recently signed off at all on  
> code for which they are responsible.  The output might be something  
> like this:
> 
> > ## Historical significance: 6 months
> > ## Uncategorized file threshold: >10 changes or >20 sign-offs
> > ## New maintainer threshold: >20 changes or >40 sign-offs
> > ## Neglectful-maintainer threshold: <5 changes and <10 sign-offs
> >
> > [SUSPEND TO RAM]
> > Nigel Cunningham should probably be a maintainer:
> >   kernel/power/* (130 changes, 132 sign-offs)
> >   include/linux/suspend.h (29 changes, 29 sign-offs)
> >
> > [RANDOM UNMAINTAINED DRIVER]
> > J. Random Hacker has neglected his maintainership:
> >   drivers/random/unmaintained.c (0 changes, 0 sign-offs)
> >
> > [UNCATEGORIZED]
> > John Linville should probably add/update a Maintainers entry:
> >   drivers/wireless/newly_added_driver.c (142 changes and 453 sign- 
> > offs)

I like this idea. :-)

Greetings,
Rafael

Storing Maintainers info around the kernel tree

[Kyle Moffett]

[-- Attachment #1: Type: text/plain, Size: 4286 bytes --]

Merging a couple related threads here:

On Aug 16, 2007, at 07:57:23, Rene Herman wrote:
> On 08/16/2007 01:26 PM, Salikh Zakirov wrote:
>> Rene Herman wrote:
>>> Perhaps that immediately suggests an implementation to someone  
>>> already familiar with git internals?
>> perhaps http://www.kernel.org/pub/software/scm/git/docs/ 
>> gitattributes.html and http://www.kernel.org/pub/software/scm/git/ 
>> docs/git-check-attr.html can help you?
>
> No, thanks, saw them, but .gitattributes is in fact in the same  
> category as .gitignore, which would _be_ a property.
>
> If you do this stuff in files scattered around the tree, updating  
> and moving stuff becomes a pain -- the tool would need to go edit  
> files.

 From a practical standpoint we don't want to duplicate someone's  
maintainer information in the attributes of every file they  
maintain.  It would be much easier to put in the "kernel/somesubsys"  
directory a Maintainers file which has:

[SOME RANDOM SUBSYSTEM]
P: J. Random Hacker
M: j.random.hacker@localhost
L: random-subsys-devel@vger.kernel.org
F: *

Anywhere else you had files that you wanted to associate with J.  
Random Hacker's maintainership, you would just use:

[SOME RANDOM SUBSYSTEM]
F: somesubsys.h


I posted a comment describing a mechanism like this a couple days ago:
   http://lkml.org/lkml/2007/8/14/488

Executive overview:
On Aug 15, 2007, at 07:21:04, Rafael J. Wysocki wrote:
> On Wednesday, 15 August 2007 04:51, Kyle Moffett wrote:
>> (a) "Maintainers" files sprinkled around the source tree with  
>> relative pathnames and other data
>>
>> (b) Tool to generate a combined "MAINTAINERS" file from the ones  
>> sprinkled around the source tree
>>
>> (c) Tool to search through the generated "MAINTAINERS" file with  
>> all sorts of useful command-line options
>>
>> (d) Tool to check the generated "MAINTAINERS" file against recent  
>> git history and make suggestions
>
> I like this idea. :-)

Well, to back up this idea with some code, I'm attaching a little  
perl script which does part (b).  Basically you call it as:
   ./maint-combine $(find . -name Maintainers)

It will print any syntax errors on stderr during parsing.  Once it's  
done it will dump to stdout its combined "MAINTAINERS" text.  A  
couple notes:

*  It uses a little "priority" system to figure out what order to  
print the data from each origin in.  For example, the "F:" tag is  
given a score of 0, to force data consisting of just files towards  
the end.  The "P:", "M:", and "L:" tags are given scores of 5, since  
people are generally interesting to know about.  Everything else is  
given a score of "1".  The scores are added up per ($file,  
$subsystem) pair and then during printing each subsystem's data is  
ordered by score (highest comes first).

*  It generally allows any field at all; eventually we might want to  
limit it to a fixed list to help avoid typos.

*  It has a little bit of magic logic for the "F:" field so that it  
figures out the relative directory for each field when generating the  
output.  For example, an entry of "asm-*/suspend.h" in a file  
"include/Maintainers" will produce the output file entry: "F: include/ 
asm-*/suspend.h"

*  The format isn't quite the same as the current MAINTAINERS file,  
to make parsing easier and more dummy-proof I changed the syntax for  
a subsystem-name to use square brackets (IE: "[SUSPEND TO RAM]").   
The samples I gave in my previous email are what I used to test it  
with, plus a little dummy file with some syntax errors to check out  
the error messages:

Maintainers:
> [EVERYTHING ELSE]
> P: Various Linux Kernel Developers
> L: linux-kernel@vger.kernel.org
> F: *

kernel/power/Maintainers:
> [SUSPEND TO RAM]
> P: Pavel Machek
> M: pavel@suse.cz
> P: Rafael J. Wysocki
> M: rjw@sisk.pl
> L: linux-pm@lists.linux-foundation.org
> S: Maintained
> F: *

include/Maintainers:
> [SUSPEND TO RAM]
> F: linux/suspend.h
> F: linux/freezer.h
> F: linux/pm.h
> F: asm-*/suspend.h



If you have any other questions, the perl script is pretty self- 
explanatory and I'll be completely back online this weekend.  With  
any luck I'll have some time in a hotel tomorrow (mmm, slow-as-dirt  
hotel wireless, what fun) to work on parts (c) and (d).

Cheers,
Kyle Moffett


[-- Attachment #2: maint-combine.txt --]
[-- Type: text/plain, Size: 2040 bytes --]

#! /usr/bin/perl

use strict;
use warnings;

## This table is for determining what order to show entries from different
## source "Maintainers" files.  They are prioritized based on the number and
## significance of each field, as listed in this table.  Any field not found
## here will be assumed to have a significance of "1".
my %fieldprio = (
	p => 5,  ## Person
	m => 5,  ## Email
	l => 5,  ## Mailing List
	f => 0,  ## File
);


my %mprio;
my %maint;
my $section;
my $origin;
my $pathprefix;
my $printorigin;

while (<>) {
	unless (defined $origin and $origin eq $ARGV) {
		undef $section;

		## Get rid of extra slashes, unnecessary "./" entries
		$ARGV =~ s{//+}{/}g;
		$ARGV =~ s{(^|/)\./}{$1};

		$origin = $ARGV;
	}

	chomp; s/\s+/ /g; s/^ //; s/ $//;
	/\S+/ or next;

	if (/^\[ ?([^]]+) ?\]$/) {
		$section = uc $1;

		$printorigin = 1 if $origin ne '-';

		$maint{$section}{$origin} ||= [];
		$mprio{$section}{$origin} ||= 0;

		## Figure out a useful path prefix if there is one
		$pathprefix = ($origin =~ m{(^.*/)(?!\.\.?$)[^/]+$})?$1:"";

		next;
	}

	unless (/^([^:]+?) ?: ?(.*)$/) {
		print STDERR "$ARGV:$.: Invalid line: $_\n";
		next;
	}

	my($field,$value) = (lc($1), $2);

	unless (defined $section) {
		print STDERR "$ARGV:$.: Found field '\u$field' before ",
				"any subsystem declaration: $_\n";
		next;
	}

	## Preprocess paths to make them absolute
	$value = $pathprefix.$value if $field eq 'f';

	## Update the sorting order
	if (exists $fieldprio{$field}) {
		$mprio{$section}{$origin} += $fieldprio{$field};
	} else {
		$mprio{$section}{$origin}++;
	}

	push @{$maint{$section}{$origin}}, [$field, $value];
}

sub priosort ( $@ )
{
	my $section = shift;
	return sort {$mprio{$section}{$b} <=> $mprio{$section}{$a}} @_;
}

for $section (sort {$a cmp $b} keys %maint) {
	print "[$section]\n";
	for my $origin (priosort $section, keys %{$maint{$section}}) {
		print "\nOrigin: $origin\n" if $printorigin;
		print "\u$_->[0]: $_->[1]\n" for @{$maint{$section}{$origin}};
	}
	print "\n\n";
}

# vim:set ft=perl:

[-- Attachment #3: Type: text/plain, Size: 0 bytes --]

Re: Storing Maintainers info around the kernel tree

[Rene Herman]

On 08/16/2007 03:04 PM, Kyle Moffett wrote:

> On Aug 16, 2007, at 07:57:23, Rene Herman wrote:

>> category as .gitignore, which would _be_ a property.
>>
>> If you do this stuff in files scattered around the tree, updating and 
>> moving stuff becomes a pain -- the tool would need to go edit files.
> 
> From a practical standpoint we don't want to duplicate someone's 
> maintainer information in the attributes of every file they maintain.  

In a tree structure, you don't have to. As described earlier, the tool 
(git-prop) looks for the requested property being set first on the file 
itself, then on the directory in which it resides, then its parent, and so 
on. If I read things right, this is also how properties work in subversion 
in fact.

So after

$ git prop --set --name maintainer --value \
	"Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>" drivers/ide/
and

$ git prop --set --name maintainer --value \
	"Alan Cox <alan@lxorguk.ukuu.org.uk>" drivers/ide/ide-cd.*

we get:

$ git prop --get --name maintainer drivers/ide/ide-cd.c
Alan Cox <alan@lxorguk.ukuu.org.uk>

$ git prop --get --name maintainer drivers/ide/ide-generic.c
Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>

Now, this override behaviour needs a tree structure ofcourse, but notice I 
set the "maintainer" property only to the name/address. The other 
information from the MAINTAINERS file would be using their own properties:

$ git prop --set --name tree --value \
     "quilt kernel.org/pub/linux/kernel/people/bart/pata-2.6/" drivers/ide/

and nothing under drivers/ide/ would override this value nor would it be 
repeated anywhere. Alan takes care of more than ide-cd but only the actual 
"maintainer" value string would be set on the others as well and repeating 
that much for different "maintenance units" is no different from the current 
MAINTAINERS file where it also is (well, would be, Alan is in fact only 
listed for ide-cd it seems...) repeated in different entries.

(as a slight difference -- in the above example, Alan's information _is_ 
repeated over ide-cd.c and ide-cd.h where the current MAINTAINERS file just 
says "IDE/ATAPI CDROM DRIVER", but that's a bit of an oddbal situation since 
you normally have either single files or a tree that make up a "maintenance 
unit" -- and is in fact just a human versus tool difference).

> It would be much easier to put in the "kernel/somesubsys" directory a 
> Maintainers file which has:

It's ofcourse possible, but note that if we want this stuff to be minimally 
manual, moving files around (and deleting them) then requires editing these 
actual in-tree files via a tool.

With the properties deleting files just requires deleting any file-specific 
properties alongside which is trivial since those are linked from the file.

Moving stuff works by building a list of all properties that are set on the 
source starting at the source and destination's highest shared parent 
directory and then reconstructing this list at the destination, striking 
properties off the list that are already set at the destination.

Adding properties, alongside added files or after the fact, could be done 
via standard patch submissals via the kind of "meta-diff" that already 
exists for "git move".

I really believe this stuff should be meta-data -- and these properties as 
outlined work well it seems.

$ git prop --set --name git.ignore -V ./.gitignore .
$ rm .gitignore

This is something I saw subversion also uses properties for. Takes the value 
from a file instead of the command line. .gitattributes are also easily 
incorporated into the property-system directly.

$ git prop --set --name git.executable scripts/Lindent

Must say I'm not particularly sure if this one has much value over the 
current executable bit storage,but also from svn and example of a boolean 
property.

$ git prop --set --name license --value "GPL v2" .
$ git prop --set --name license --value "GPL" sound/alsa/

and so on. The GPL v2 on the source root only works if you set the property 
on everything that's not, so you may not want to but as a "wouldn't it be 
nice if" kinda thing. Makes for easy license analysis at least...

$ git prop --set --name FIXME drivers/block/floppy.c

Okay, that's probably overdoing it a bit, but as long as I'm having fun here...

Note -- the properties would be versioned themselves ofcourse so that you'd 
always have a tree where data and meta-data matched. Basically, I believe 
you'd view the properties as just more data files, one per property, with 
the exception that they'd not actually live in the working tree and are 
linked from data (files/directories) that do.

Long "letters of intent" this, but I'm by now in love with these things. 
More comments (or implementations obviously :-) welcome. Any significant 
misses in this?

Rene.

Re: [PATCH] [443/2many] MAINTAINERS - HIBERNATION (aka Software Suspend, aka swsusp):

[Joe Perches]

On Tue, 2007-08-14 at 11:15 -0700, Linus Torvalds wrote:
> In other words, it would be much better to just have per-file markers, 
> along with some per-subdirectory stuff or similar.

So that there would be no hot single file, I cut the
MAINTAINER file into single file segments in maintainers/*

00_descriptions
3c359_network_driver
3c505_network_driver
3c59x_network_driver
3cr990_network_driver
...
zd1211rw_wireless_driver
zf_machz_watchdog
zr36067_video_for_linux_driver
zs_decstation_z85c30_serial_driver
zz_the_rest

611 files.

How could "make" make a single MAINTAINERS?

	"cat [0-9a-z]* > ../MAINTAINERS"?

Would it need to?
Anyone have suggestions for Makefile/Kconfig support?

Re: [PATCH] [443/2many] MAINTAINERS - HIBERNATION (aka Software Suspend, aka swsusp):

[Rafael J. Wysocki]

On Monday, 13 August 2007 22:54, Joe Perches wrote:
> On Mon, 2007-08-13 at 22:50 +0200, Rafael J. Wysocki wrote:
> > Please add
> > arch/i386/power/
> > arch/x86_64/kernel/suspend_asm.S
> > arch/x86_64/kernel/suspend.c
> > drivers/base/power/
> > There also is a couple of headers.  Do you want to list them too?
> 
> Your choice.  Just let me know.

+ include/linux/suspend.h
+ include/linux/freezer.h
+ include/linux/pm.h
+ include/asm-*/suspend.h

Hm, they are also relevant for suspend to RAM, so perhaps one common
list of files for suspend to RAM and hibernation would be better?

> HIBERNATION (aka Software Suspend, aka swsusp):
> P:	Pavel Machek
> M:	pavel@suse.cz
> P:	Rafael J. Wysocki
> M:	rjw@sisk.pl
> L:	linux-pm@lists.linux-foundation.org
> S:	Supported
> F:	Documentation/power/swsusp*
> F:	arch/i386/power/
> F:	arch/x86_64/kernel/suspend*
> F:	drivers/base/power/
> F:	kernel/power/
> 
> 
> 
> 
> 

-- 
"Premature optimization is the root of all evil." - Donald Knuth

[PATCH] [443/2many] MAINTAINERS - HIBERNATION (aka Software Suspend, aka swsusp):

[joe]

Add file pattern to MAINTAINER entry

Signed-off-by: Joe Perches <joe@perches.com>

diff --git a/MAINTAINERS b/MAINTAINERS
index 29a2179..5ae90a2 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -4215,6 +4215,9 @@ P:	Rafael J. Wysocki
 M:	rjw@sisk.pl
 L:	linux-pm@lists.linux-foundation.org
 S:	Supported
+F:	Documentation/power/swsusp*
+F:	arch/i386/power/swsusp.S
+F:	kernel/power/
 
 SUSPEND TO RAM:
 P:	Pavel Machek