Re: [PATCH] mm: optionally disable brk()

[Topi Miettinen]

On 5.10.2020 17.12, Jonathan Corbet wrote:
> On Mon, 5 Oct 2020 11:11:35 +0300
> Topi Miettinen <toiwoton@xxxxxxxxx> wrote:
>
> > The point is not to shrink the kernel (it will shrink by one small
> > function) or get rid of complexity. The point is to disable an inferior
> > interface. Memory returned by mmap() is at a random location but with
> > brk() it is located near the data segment, so the address is more easily
> > predictable.
>
> So if your true objective is to get glibc to allocate memory differently,
> perhaps the right thing to do is to patch glibc?

Of course:
https://sourceware.org/pipermail/libc-alpha/2020-October/118319.html

But since glibc is pretty much the only user of brk(), it also makes 
sense to disable it in the kernel if nothing uses it anymore.

-Topi