Re: 2.4 vm, program load, page faulting, ...

[Andrew Morton]

[e-mail] wrote:
>
> > This is all a bit dubious for several reasons.  Most particularly, the
> > up-front instantiation of the pages in pagetables makes unneeded pages harder
> > to reclaim.  It would be really neat if someone could try putting the
> > madvise(MADV_WILLNEED) into glibc and test that.  Maybe on a 2.4 kernel.
> 
> 
> something like this one?
> 

No, not at all.  I meant a patch against glibc, not against the kernel!

Like this:

	map = mmap(..., PROT_EXEC, ...);
+	if (getenv("MAP_PREFAULT"))
+		madvise(map, length, MADV_WILLNEED);