On Wed, Jul 15, 2020 at 2:35 PM Linus Torvalds <torvalds@xxxxxxxxxxxxxxxxxxxx> wrote: > > The stack relocation only moves down. .. and that may not be true on a grow-up stack. Christ, that code is hard to read. But I think Kirill is right, and I'm wrong. So that "try to expand" code is only ok when non-overlapping, or when moving down. Naresh - from a testing standpoint, that doesn't make any difference: I'd still like you to test on x86. We always shift the stack down there. Linus