Re: [PATCH resubmit] do_mount: reduce stack consumption

[Andrew Morton]

Arjan van de Ven <arjanv@xxxxxxxxxx> wrote:
>
> 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.

In that case, does s390 still have a problem that we need to be solving here?

(s390 doesn't implement CONFIG_DEBUG_STACK_USAGE.  Suggest you do so, then
stick a dump_stack() into do_exit()).

(dm is still doing very risky things though)
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