linux-kernel - Re: [PATCH] x86/mm: Do not split_large_page() for set_kernel_text

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Message-ID: <20190826124452.GS2369@hirez.programming.kicks-ass.net>
Date:   Mon, 26 Aug 2019 14:44:52 +0200
From:   Peter Zijlstra <peterz@...radead.org>
To:     Steven Rostedt <rostedt@...dmis.org>
Cc:     Song Liu <songliubraving@...com>, linux-kernel@...r.kernel.org,
        linux-mm@...ck.org, kernel-team@...com, stable@...r.kernel.org,
        Thomas Gleixner <tglx@...utronix.de>,
        Dave Hansen <dave.hansen@...el.com>,
        Andy Lutomirski <luto@...capital.net>,
        Nadav Amit <namit@...are.com>,
        Daniel Bristot de Oliveira <bristot@...hat.com>
Subject: Re: [PATCH] x86/mm: Do not split_large_page() for
 set_kernel_text_rw()

On Mon, Aug 26, 2019 at 07:33:08AM -0400, Steven Rostedt wrote:
> Anyway, I believe Nadav has some patches that converts ftrace to use
> the shadow page modification trick somewhere.
> 
> Or we also need the text_poke batch processing (did that get upstream?).

It did. And I just did that patch; I'll send out in a bit.

It seems to work, but this is the very first time I've looked at this
code.