[PATCH] RFC: reduce static data usage

Denis Vlasenko vda.linux at googlemail.com
Mon Jul 30 16:41:30 UTC 2007


On 7/29/07, Denis Vlasenko <vda.linux at googlemail.com> wrote:
> On 7/23/07, Bernhard Fischer <rep.dot.nop at gmail.com> wrote:
> > >These six patches make uclibc malloc big(ger) buffers instead of
> > >keeping them in data/bss - should help NOMMU people.
> > >
> > >patch #1: introduce __uc_malloc, so that users can intercept OOM.
> > >patch #2: convert des.c to use __uc_malloc (-70 kbytes of bss)
> > >patch #3: convert resolv.c
> > >patch #4: convert pwd_grp.c
> > >patch #5: convert utent.c, getpass.c
> > >patch #6: convert getnetent.c, md5.c
> > >
> > >This deals with almost all buffers bigger than 100 bytes.
> > >We pay in code size for that (+20 - +40 bytes per module
> > >on i386):
> >
> > Sounds like a good idea to me, fwiw.
> > The '//' comments should be converted to '/**/' imo, but that's just
> > cosmetics. Also, i think that you should hide all stuff that is exported
> > in __uc_malloc.c (see hidden_proto/hidden_def et al).
> > Care to take this into account?
>
> Will do. Things slowed down here due to dead ISP link at home.

// are fixed.

I don't quite understand how to do hiding of __uc_malloc and __uc_malloc_failed.
I see several different usage patterns for XXX_hidden_XXX macros,
and also see open-coded attribute defs.

I will apply patches without attempting to do this hiding stuff.
Can fix it later when I will understand this stuff better.
--
vda



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