Need advice on updating the Linux kernel map

Need advice on updating the Linux kernel map

[Constantine Shulyupin]

I was wondering if you could help me. I've recently resumed work on
the map of the Linux kernel - http://www.makelinux.net/kernel_map in
order to make it more up-to-date and to improve it. Please let me know
how I can update the map, as it would help me a lot.

Thank you in advance.
Constantine

Re: Need advice on updating the Linux kernel map

[Valdis.Kletnieks]

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On Sun, 25 Apr 2010 02:02:29 +0300, Constantine Shulyupin said:
> I was wondering if you could help me. I've recently resumed work on
> the map of the Linux kernel - http://www.makelinux.net/kernel_map in
> order to make it more up-to-date and to improve it. Please let me know
> how I can update the map, as it would help me a lot.

A few quick comments:

1) Can we do better than an OSI 7-layer burrito? ;)  As it stands, doing it
that way creates a lot of things that look like layering violations.  For
instance, "Device Model" is up on "virtual", when it actually gets *used*
several levels further down.  And you have a *lot* of vertical lines that
cross a whole bunch of levels.  You would probably be served much better
by letting each column be a lot wider, and maybe only 4 levels high (you
can probably squish virtual/bridges/logical into one wider level).

1b) Much of the I/O column should be one wide section across the bottom of
disk/network/user peripherals, and the 'system run' box should be in some
other column(s).

2) Security and debugging seem to be forced in the "user peripherals" column
for no real rational reason.

3) I see no mention of tracing/oprofile/perf.

Hope that helps...

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Re: Need advice on updating the Linux kernel map

[Constantine Shulyupin]

Hi Valdis,

Thank you for your comments! Is very helpful!


On Tue, Apr 27, 2010 at 4:41 PM,  <Valdis.Kletnieks@vt.edu> wrote:
> On Sun, 25 Apr 2010 02:02:29 +0300, Constantine Shulyupin said:
>> I was wondering if you could help me. I've recently resumed work on
>> the map of the Linux kernel - http://www.makelinux.net/kernel_map in
>> order to make it more up-to-date and to improve it. Please let me know
>> how I can update the map, as it would help me a lot.
>
> A few quick comments:
>
> 1) Can we do better than an OSI 7-layer burrito? ;)  As it stands, doing it
> that way creates a lot of things that look like layering violations.  For
> instance, "Device Model" is up on "virtual", when it actually gets *used*
> several levels further down.  And you have a *lot* of vertical lines that
> cross a whole bunch of levels.  You would probably be served much better
> by letting each column be a lot wider, and maybe only 4 levels high (you
> can probably squish virtual/bridges/logical into one wider level).
>
> 1b) Much of the I/O column should be one wide section across the bottom of
> disk/network/user peripherals, and the 'system run' box should be in some
> other column(s).
>
> 2) Security and debugging seem to be forced in the "user peripherals" column
> for no real rational reason.
>
> 3) I see no mention of tracing/oprofile/perf.
>
> Hope that helps...
>



-- 
Constantine Shulyupin
Embedded Linux Expert
TI DaVinci Expert
Tel-Aviv Israel
http://www.LinuxDriver.co.il/

Re: Need advice on updating the Linux kernel map

[Constantine Shulyupin]

Hi Valdis,

Thank you for your feedback.
I updated and continue to update the map of the Linux kernel -
http://www.makelinux.net/kernel_map

With your feedback I reworked connections and added
tracing/oprofile/perf to debug segment.

Indeeds, security and debugging is forced to be in user interface and
have no direct relations to peripherals. But other places are less
suable. I decided to put security and debugging in UI, because
security limits UI (as user) and debugging expands UI (as developer).

Thanks.

On Tue, Apr 27, 2010 at 4:41 PM,  <Valdis.Kletnieks@vt.edu> wrote:
> On Sun, 25 Apr 2010 02:02:29 +0300, Constantine Shulyupin said:
>> I was wondering if you could help me. I've recently resumed work on
>> the map of the Linux kernel - http://www.makelinux.net/kernel_map in
>> order to make it more up-to-date and to improve it. Please let me know
>> how I can update the map, as it would help me a lot.
>
> A few quick comments:
>
> 1) Can we do better than an OSI 7-layer burrito? ;)  As it stands, doing it
> that way creates a lot of things that look like layering violations.  For
> instance, "Device Model" is up on "virtual", when it actually gets *used*
> several levels further down.  And you have a *lot* of vertical lines that
> cross a whole bunch of levels.  You would probably be served much better
> by letting each column be a lot wider, and maybe only 4 levels high (you
> can probably squish virtual/bridges/logical into one wider level).
>
> 1b) Much of the I/O column should be one wide section across the bottom of
> disk/network/user peripherals, and the 'system run' box should be in some
> other column(s).
>
> 2) Security and debugging seem to be forced in the "user peripherals" column
> for no real rational reason.
>
> 3) I see no mention of tracing/oprofile/perf.
>
> Hope that helps...
>



-- 
Constantine Shulyupin
Embedded Linux Expert
TI DaVinci Expert
Tel-Aviv Israel
http://www.LinuxDriver.co.il/