# Re: \[RFC, PATCHv2 29/29\] mm, x86: introduce RLIMIT\_VADDR - From: Andy Lutomirski \ - Date: 2017-01-05 17:56:48 - List: linux-api - Page: https://ratatoskr.run/linux-api/2017/01/4905604 - Thread: https://ratatoskr.run/linux-arch/2016/12/4900741/t.md ```text On Wed, Jan 4, 2017 at 6:19 AM, Kirill A. Shutemov [ref] wrote: > On Tue, Jan 03, 2017 at 10:27:22AM -0800, Andy Lutomirski wrote: >> On Tue, Jan 3, 2017 at 8:04 AM, Kirill A. Shutemov [ref] wrote: >> > And what about stack? I'm not sure that everybody would be happy with >> > stack in the middle of address space. >> >> I would, personally. I think that, for very large address spaces, we >> should allocate a large block of stack and get rid of the "stack grows >> down forever" legacy idea. Then we would never need to worry about >> the stack eventually hitting some other allocation. And 2^57 bytes is >> hilariously large for a default stack. > > The stack in the middle of address space can prevent creating other huuuge > contiguous mapping. Databases may want this. Fair enough. OTOH, 2^47 is nowhere near the middle if we were to put it near the top of the legacy address space. -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@kvack.org. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: email@kvack.org ```