Date: Wed, 8 Feb 2017 20:26:29 -0800 From: Eric Biggers <ebiggers3@...il.com> To: Hoeun Ryu <hoeun.ryu@...il.com> Cc: Kees Cook <keescook@...omium.org>, Michal Marek <mmarek@...e.com>, Andrew Morton <akpm@...ux-foundation.org>, Emese Revfy <re.emese@...il.com>, Ingo Molnar <mingo@...nel.org>, Mickaël Salaün <mic@...ikod.net>, Nicholas Piggin <npiggin@...il.com>, Andy Lutomirski <luto@...nel.org>, Michal Hocko <mhocko@...e.com>, "Eric W. Biederman" <ebiederm@...ssion.com>, Mateusz Guzik <mguzik@...hat.com>, linux-kernel@...r.kernel.org, kernel-hardening@...ts.openwall.com Subject: Re: [PATCH v2 2/2] fork: make number of cached stacks (vmapped) configurable using Kbuild On Thu, Feb 09, 2017 at 01:03:47PM +0900, Hoeun Ryu wrote: > +config NR_VMAP_STACK_CACHE > + int "Number of cached stacks" > + default "2" > + depends on VMAP_STACK > + help > + This determines how many stacks can be cached for virtually > + mapped kernel stacks. > + Can you explain in the help text under what circumstances someone should change this, and to what value? As-is, it seems like somewhat of a useless config option which no one will ever change. - Eric
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