linux-kernel - Re: [PATCH V5 7/7] x86/jump_label: Batch jump label updates

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Message-ID: <e3ff2665-cf0a-a172-9484-f609adecbf25@redhat.com>
Date:   Mon, 15 Apr 2019 14:15:09 +0200
From:   Daniel Bristot de Oliveira <bristot@...hat.com>
To:     Peter Zijlstra <peterz@...radead.org>
Cc:     linux-kernel@...r.kernel.org, Thomas Gleixner <tglx@...utronix.de>,
        Ingo Molnar <mingo@...hat.com>, Borislav Petkov <bp@...en8.de>,
        "H. Peter Anvin" <hpa@...or.com>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Masami Hiramatsu <mhiramat@...nel.org>,
        "Steven Rostedt (VMware)" <rostedt@...dmis.org>,
        Jiri Kosina <jkosina@...e.cz>,
        Josh Poimboeuf <jpoimboe@...hat.com>,
        Chris von Recklinghausen <crecklin@...hat.com>,
        Jason Baron <jbaron@...mai.com>, Scott Wood <swood@...hat.com>,
        Marcelo Tosatti <mtosatti@...hat.com>,
        Clark Williams <williams@...hat.com>, x86@...nel.org
Subject: Re: [PATCH V5 7/7] x86/jump_label: Batch jump label updates

On 4/15/19 1:54 PM, Peter Zijlstra wrote:
> So how about we do something like:
> 
> +static struct bp_patching_desc {
> +       int nr_entries;
> +       struct text_patch_loc vec[PAGE_SIZE / sizeof(struct text_patch_loc)];
> +} bp_patching;
> 
> and call it a day?

Sure!

Actually, I used something like that in my first poc patches (for my own), but I
thought people would complain...

If nobody else complains, I will use it in the next version.

-- Daniel