[uml-devel] Doubt regarding UML

[uml-devel] Doubt regarding UML

[battipatisainagendra Bhavaniprasad]

Hi All,
           This is prasad,I am new to UML.Can any one clearfy the
 following doubts....
1.What is skas patch,is it required for 2.6 kernel or i comes with
 built in and if apply skas patch for my host kernel ,is it required to
 recompile the hole kernel and then install UML.

2.I have downloaded linux 2.4.27 from kernel.org and applyed
uml-patch-2.4.27-1.bz2 to it.
  after giving following command ......
  make menuconfig ARCH=um
  I have got a prompt to select SKAS mode in gendral setup option.
 My doubt is will linux 2.4.20(which is my host kernel) will have
already skas patch built in?

3.Is there any document to debug kernel by mounting gdb from host kernel.

 please reply ASAP.

 rgds,
 Prasad.

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Re: [uml-devel] [uml-user] Doubt regarding UML

[Blaisorblade]

On mercoledì 23 maggio 2007, battipatisainagendra Bhavaniprasad wrote:
> Hi All,
>            This is prasad,I am new to UML.Can any one clearfy the
>  following doubts....
> 1.What is skas patch,is it required for 2.6 kernel or i comes with
>  built in and if apply skas patch for my host kernel ,is it required to
>  recompile the hole kernel and then install UML.

No vanilla kernel (nor 2.4 nor 2.6) contains already the SKAS3 patch.
But recent UML kernel can run on any host in SKAS0 mode, slightly slower but 
good for normal use.
Otherwise, you can recompile the host kernel after applying on it the SKAS 
patch and UML kernels will automatically use the faster SKAS3 mode.

> 2.I have downloaded linux 2.4.27 from kernel.org and applyed
> uml-patch-2.4.27-1.bz2 to it.
>   after giving following command ......
>   make menuconfig ARCH=um
>   I have got a prompt to select SKAS mode in gendral setup option.

>  My doubt is will linux 2.4.20(which is my host kernel) will have
> already skas patch built in?

No vanilla kernel (nor 2.4 nor 2.6) contains already the SKAS3 patch.

> 3.Is there any document to debug kernel by mounting gdb from host kernel.
There are. Go to this page:
http://user-mode-linux.sourceforge.net/
and look for "debugging" in _that_ page. Then follow the "debugging in SKAS 
mode".
-- 
Inform me of my mistakes, so I can add them to my list!
Paolo Giarrusso, aka Blaisorblade
http://www.user-mode-linux.org/~blaisorblade

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