linux-kernel - Re: [PATCH] vsprintf: Fix memory barriers of ptr_key to have_filed_random_ptr

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Message-ID: <CA+55aFztxY-w=0tPZ8KAenENA7NCYSWUcCPV4Nzs0ffwrh3G4Q@mail.gmail.com>
Date:   Tue, 15 May 2018 15:31:37 -0700
From:   Linus Torvalds <torvalds@...ux-foundation.org>
To:     Steven Rostedt <rostedt@...dmis.org>
Cc:     Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        Peter Zijlstra <peterz@...radead.org>,
        Kees Cook <keescook@...omium.org>,
        Andrew Morton <akpm@...ux-foundation.org>,
        tcharding <me@...in.cc>
Subject: Re: [PATCH] vsprintf: Fix memory barriers of ptr_key to have_filed_random_ptr_key

On Tue, May 15, 2018 at 1:10 PM Steven Rostedt <rostedt@...dmis.org> wrote:
> The work queue looks to run immediately.

2ms is definitely not "immediately". It's just "soon".

The whole - and _only_ reason we're doing all these changes is that people
wanted reliable object hashes from very early bootup tracing, so I think it
matters.

> we could always do this:

Ugh. I think I prefer the barriers.

                Linus