linux-kernel - Re: [PATCH v2 5/7] x86/mm, tracing: Fix CR2 corruption

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Message-ID: <20190711122126.GN3419@hirez.programming.kicks-ass.net>
Date:   Thu, 11 Jul 2019 14:21:26 +0200
From:   Peter Zijlstra <peterz@...radead.org>
To:     Steven Rostedt <rostedt@...dmis.org>
Cc:     Linus Torvalds <torvalds@...ux-foundation.org>,
        Andy Lutomirski <luto@...nel.org>,
        Thomas Gleixner <tglx@...utronix.de>,
        Borislav Petkov <bp@...en8.de>, Ingo Molnar <mingo@...nel.org>,
        "H. Peter Anvin" <hpa@...or.com>,
        Dave Hansen <dave.hansen@...ux.intel.com>,
        Juergen Gross <jgross@...e.com>,
        LKML <linux-kernel@...r.kernel.org>,
        He Zhe <zhe.he@...driver.com>,
        Joel Fernandes <joel@...lfernandes.org>, devel@...ukata.com,
        stable <stable@...r.kernel.org>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Sasha Levin <sashal@...nel.org>
Subject: Re: [PATCH v2 5/7] x86/mm, tracing: Fix CR2 corruption

On Wed, Jul 10, 2019 at 04:27:09PM -0400, Steven Rostedt wrote:

> But isn't it easier for them to just pull the quick fix in, if it is in

Steve, I've not yet seen a quick fix that actually fixes all the
problems.

Your initial one only fixes the IRQ tracing one, but leaves the context
tracking one wide open.