Re: allocating memory during kernel startup

[Masao Uebayashi <uebayasi%tombi.co.jp@localhost>]

On Thu, May 06, 2010 at 02:32:57PM -0400, Michael wrote:
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> Hello,
> 
> I recently ran into this problem - there is no easy way to determine
> wether it is safe to call kmem_alloc() yet ( as in, are we far
> enough through startup ) and when we call it too early the whole
> thing just hangs.

We have no clear definition of the kernel state - what is boot, startup,
and when it's done.

> Any chance to just have kmem_alloc() immediately return NULL if it
> isn't ready yet so we can fail gracefully instead of hanging?

I like panic().

I think that complicating memory allocation in bootstrap is not a good
thing.  What is your purpose?

Masao

> 
> have fun
> Michael
> 
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-- 
Masao Uebayashi / Tombi Inc. / Tel: +81-90-9141-4635