Re: [uml-devel] [uml-user] 64 bit host ?

Re: [uml-devel] [uml-user] 64 bit host ?

[Antoine Martin]

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lanas wrote:
>>> Even then, I'm surely missing something.  The Fedora Core x86_64
>>> binary is a mere 2 MB.  Shouldn't be a UML-patched kernel about the
>>> same size ?
> 
>> Hmmm, not sure.
>> Looks like the debug info is big indeed.
>> The config files are available, so you should be able to figure out
>> what makes it so fat. (frame-pointers?)
> 
[snip]
> 
> On the other hand, I downloaded today the source code of kernel
> 2.6.23-something and it was about 45 MB all in all.  Hard to imagine
> that a compiled kernel would be of the same size, no ?
Hah, yes. thinking about it, 45MB is a tad excessive!

Antoine
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Re: [uml-devel] [uml-user] 64 bit host ?

[Karol Swietlicki]

On 13/12/2007, Antoine Martin <antoine@nagafix.co.uk> wrote:

I follow only one list, uml-devel, so my reply is only based only on
the context that I have from this mail.

> lanas wrote:
> >>> Even then, I'm surely missing something.  The Fedora Core x86_64
> >>> binary is a mere 2 MB.  Shouldn't be a UML-patched kernel about the
> >>> same size ?

It is. In a way.
karol@BlackBox ~/expe $ du linux
22056   linux
karol@BlackBox ~/expe $ strip linux
karol@BlackBox ~/expe $ du linux
1868    linux

> >> Hmmm, not sure.
> >> Looks like the debug info is big indeed.
> >> The config files are available, so you should be able to figure out
> >> what makes it so fat. (frame-pointers?)

Not at all. Actually, as far as I know it is the lack of frame
pointers that makes the code bigger. Either way, it would never make
it bloat extremely.

> > On the other hand, I downloaded today the source code of kernel
> > 2.6.23-something and it was about 45 MB all in all.  Hard to imagine
> > that a compiled kernel would be of the same size, no ?
> Hah, yes. thinking about it, 45MB is a tad excessive!

Not really. The debug information is really plentiful.
Add in a few libraries with static compiling and you have a
monster-sized kernel on your hands.

> Antoine

Karol Swietlicki

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