Re: [PATCH resubmit] do_mount: reduce stack consumption

[Arjan van de Ven]

On Fri, Nov 04, 2005 at 09:42:12AM -0800, Andrew Morton wrote:
> Andreas Herrmann <AHERRMAN@xxxxxxxxxx> wrote:
> >
> > Obviously you missed the point that (depending on the compiler version,
> >  options etc.) do_move_mount() and do_add_mount() can be inlined.
> 
> I think we found a way of preventing the 3.x compiler from doing that.  Arjan,
> do you recall where we ended up with that problem?

it was mostly caused by -funit-at-a-time that caused 3.x to go haywire. You
need to turn that off in general.

the real fix is in gcc 4.x (4.1 at least) where gcc got a lot smarter about
stack slot lifetimes
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