gmane.linux.configuration

Kconfig entry defined multiple times

gwr — 2012-08-22T08:05:44

Hello,

I am working on kernel 2.6.32.38, and I see :

~~~~~~~~~~~~~~~~~~~~~~~~~~

arch/x86/Kconfig, 202 :
=============

config USE_GENERIC_SMP_HELPERS
     def_bool y
     depends on SMP

~~~~~~~~~~~~~~~~~~~~~~~~~~

arch/Kconfig, 112 :
===========

config USE_GENERIC_SMP_HELPERS
     bool

~~~~~~~~~~~~~~~~~~~~~~~~~~

Although we have this in Kconfig documentation,
================================================
A config option can be defined multiple times with the same name, but every
definition can have only a single input prompt and the type must not 
conflict.
================================================

here,
   - the first definition is a child of "Linux Kernel Configuration for 
x86" MainMenu ( arch/x86/Kconfig, 1 )
   - the second definition is a child of "General setup" Menu ( 
init/Kconfig, 24 )

So the hierarchy is different ; Can someone give explanations on this ?

Thx
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Kconfig

gwr — 2012-08-22T07:59:43

Hello,

I am working on kernel 2.6.32.38, and I see :

~~~~~~~~~~~~~~~~~~~~~~~~~~

arch/x86/Kconfig, 202 :
=============

config USE_GENERIC_SMP_HELPERS
     def_bool y
     depends on SMP

~~~~~~~~~~~~~~~~~~~~~~~~~~

arch/Kconfig, 112 :
===========

config USE_GENERIC_SMP_HELPERS
     bool

~~~~~~~~~~~~~~~~~~~~~~~~~~

Although we have this in Kconfig documentation,
================================================
A config option can be defined multiple times with the same name, but every
definition can have only a single input prompt and the type must not 
conflict.
================================================

here,
   - the first definition is a child of "Linux Kernel Configuration for 
x86" MainMenu ( arch/x86/Kconfig, 1 )
   - the second definition is a child of "General setup" Menu ( 
init/Kconfig, 24 )

So the hierarchy is different ; Can someone give explanations on this ?

Thx


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buffer/tcp configuration

Baldomero Coll — 2011-01-28T15:19:15

Hi,

I'm using ubuntu 10.04 LTS. I would like to configure my IBSS (ad-hoc) network 
augmenting the buffer sizes. I'm trying to give you more details.

I have 3 laptops in ad-hoc mode, and I transfer a file (via TCP protocol) 
between the end nodes using the middle node as relay. What i would like to do 
is to increase the middle node's buffer to allow that in case the second 
wireless link break the first wireless link stand working (until the buffer is 
filled).

I've been configuring the tcp_mem, tcp_rmem and tcp_wmem files of 
the /proc/sys/net/ipv4 folder, but it doen't result in any change.

I thought that the TCP protocol should be also configured, but i don't know 
how to configure parameters such as the congestion window.

Can you gime me some advice?

Regards, bc

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How to insert splint info Makefile? Any idea?

Gary Yang — 2010-03-26T01:29:01

Hi,

I am working on linux-2.6.25. I would like to use splint. At one of the source directory, I typed "splint *.c". I got "Cannot find include file", "Cannot continue". I understand that I need to run splint inside the Makefile so that it will find the correct include files. However, how to insert splint info Makefile? Any idea?


splint *.c
Splint 3.1.2 --- 24 Mar 2010

cache.c:7:25: Cannot find include file asm/pgtable.h on search path:
                 /usr/include;/usr/local/include
  Preprocessing error. (Use -preproc to inhibit warning)
cache.c:42:27: #error Unknown cache type.
Preprocessing error for file: /projects/svdc/P4wsIPCSW/buildsw_canyonlands/linux
                  /arch/m32r/mm/cache.c
*** Cannot continue.


Thanks,


Gary




      
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How to get Root filesystem on PHRAM

Stern, Eli — 2010-02-11T10:35:11

I would like to have my root file system reside on a PHRAM.
Reason: Embedded Linux. This way I can download the file system into RAM, without burning it into Flash. This saves time. I know there are other ways, e.g. Ramdisk, but this will require creating and maintaining several types of images. The phram solution allows using the same image that is burned into Flash.

I tried to create a phram by adding the following to the kernel command line : 
    phram.phram=RAM0,0x83800000,8Mi
Then use it in the mtdparts :
    mtdparts=RAM0:0xcfb48< at >0x7f1cb8(Kernel)ro,0x21dc00(RootFileSystem)ro...

The result is:
    phram: out of memory

Looking at phram.c, seems phram_setup() attempts to kmalloc(), and it is probably too early in the startup sequence.

Is there a way to delay creation of the phram to a stage where kmalloc() is allowed?
On the other hand, is there a way to configure so my phram is always created (at the allowed time) regardless of the command line?

Thanx

Eli Stern

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su subshell

Joe — 2009-09-17T20:34:26

Hi,

I met a strange behavior of su command with "-". I login my host as
root and want to run some command with normal user, say joe. Here is
what I see:

[root< at >stone]# su - joe -c ls
[joe< at >stone]$                                        <===== Instead of
list the files under this directory, the shell login the account joe
[joe< at >stone]$ exit
Desktop Music                                      <===== When I type
exit in the subshell, it prints the output of "ls" command and then
return to root
[root< at >stone]#




If not speficying "-", everything works fine:
[root< at >stone]# su joe -c ls
Desktop Music
[root< at >stone]#


Any ideas? Am I missing something?


Thanks in advance,
Joe
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