linux-kernel - Re: [PATCH 0/3] x86/pti: Get rid of entry trampolines and add some docs

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Message-ID: <CA+55aFwJDk27MjGmPH+ECDbMem9R_xuZydaayrzs-KHedr13DQ@mail.gmail.com>
Date:   Sat, 1 Sep 2018 09:34:43 -0700
From:   Linus Torvalds <torvalds@...ux-foundation.org>
To:     Andrew Lutomirski <luto@...nel.org>
Cc:     "the arch/x86 maintainers" <x86@...nel.org>,
        Borislav Petkov <bp@...en8.de>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        Dave Hansen <dave.hansen@...ux.intel.com>,
        Adrian Hunter <adrian.hunter@...el.com>,
        Alexander Shishkin <alexander.shishkin@...ux.intel.com>,
        Arnaldo Carvalho de Melo <acme@...nel.org>,
        Josh Poimboeuf <jpoimboe@...hat.com>,
        Joerg Roedel <joro@...tes.org>, Jiri Olsa <jolsa@...hat.com>,
        Andi Kleen <ak@...ux.intel.com>,
        Peter Zijlstra <peterz@...radead.org>
Subject: Re: [PATCH 0/3] x86/pti: Get rid of entry trampolines and add some docs

On Fri, Aug 31, 2018 at 3:21 PM Andy Lutomirski <luto@...nel.org> wrote:
>
> This gets rid of entry trampolines.

Despite my syntactic comment on 2/3, I'd love for this to go in. The
extra indirection through the trampoline is confusing, I think, in
addition to being a performance issue.

              Linus