Re: [2.6 patch] i386: always use 4k stacks

Jörn Engel
2005-11-30T11:49:51Z

On Wed, 30 November 2005 03:31:13 -0700, Eric W. Biederman wrote:
> Kenneth Parrish <Kenneth.Parrish@familynet-international.net> writes:
>
> > -=> In article 16 Nov 05 14:40:16, Adrian Bunk wrote to All <=-
> >
> > AB> If one function calls another function you have to add the stack
> > AB> usages.
> >
> > these few may do that, i bet.
> > 0xc02bb528 huft_build: 1432
> > 0xc02bb954 huft_build: 1432
> > 0xc02bc1c4 inflate_dynamic: 1312
> > 0xc02bc2ff inflate_dynamic: 1312
> > 0xc02bc082 inflate_fixed: 1168
> > 0xc02bc172 inflate_fixed: 1168
>
> Now what is interesting is these functions currently run with a 4KiB
> stack on every bootup. So unless they have callers with a
> significant stack footprint things are fine.

The longest call chain for these functions eats roughly 3.2k on i386
with allyesconfig. Measured with a statical code checker, not tested.

Jörn

--
Simplicity is prerequisite for reliability.
-- Edsger W. Dijkstra