From: Peter Zijlstra <peterz@infradead.org>
To: Andy Lutomirski <luto@amacapital.net>
Cc: Thomas Gleixner <tglx@linutronix.de>,
Borislav Petkov <bp@alien8.de>,
Frederic Weisbecker <fweisbec@gmail.com>,
Brian Gerst <brgerst@gmail.com>,
"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
X86 ML <x86@kernel.org>,
Linus Torvalds <torvalds@linux-foundation.org>
Subject: Re: [PATCH 3/4] x86/asm: Add asm macros for static keys/jump labels
Date: Mon, 9 Nov 2015 10:48:41 +0100 [thread overview]
Message-ID: <20151109094841.GG17308@twins.programming.kicks-ass.net> (raw)
In-Reply-To: <CALCETrVfKj6Qy0xgKAQS8LFGf9mY8es_SaZb2quiE4TscGyZYg@mail.gmail.com>
On Sat, Nov 07, 2015 at 10:16:37AM -0800, Andy Lutomirski wrote:
> >> Unfortunately, these only work if HAVE_JUMP_LABEL ....
>
> Yeah, I don't really like that either. I think that the real fix
> would be to compile in the runtime jump label bits unconditionally.
> Admittedly it would bloat the kernel image a little bit for
> !CONFIG_JUMP_LABEL or if build with an older gcc, and that's even less
> appropriate for 4.4 at this point. Peter?
That is a _lot_ of code for just one user. I'll bet the tiny people
won't be happy about that.
next prev parent reply other threads:[~2015-11-09 9:48 UTC|newest]
Thread overview: 18+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-11-06 23:12 [PATCH 0/4] x86 entry stuff, maybe for 4.4 Andy Lutomirski
2015-11-06 23:12 ` [PATCH 1/4] x86/entry/64: Fix irqflag tracing wrt context tracking Andy Lutomirski
2015-11-07 9:59 ` Thomas Gleixner
2015-11-07 11:18 ` Borislav Petkov
2015-11-09 4:20 ` Andy Lutomirski
2015-11-06 23:12 ` [PATCH 2/4] context_tracking: Switch to new static_branch API Andy Lutomirski
2015-11-07 9:59 ` Thomas Gleixner
2015-11-06 23:12 ` [PATCH 3/4] x86/asm: Add asm macros for static keys/jump labels Andy Lutomirski
2015-11-07 11:20 ` Thomas Gleixner
2015-11-07 16:49 ` Andy Lutomirski
2015-11-07 16:58 ` Thomas Gleixner
2015-11-07 17:05 ` Andy Lutomirski
2015-11-07 17:08 ` Thomas Gleixner
2015-11-07 18:16 ` Andy Lutomirski
2015-11-09 9:48 ` Peter Zijlstra [this message]
2015-11-08 16:16 ` Andy Lutomirski
2015-11-06 23:12 ` [PATCH 4/4] x86/entry/64: Bypass enter_from_user_mode on non-context-tracking boots Andy Lutomirski
2015-11-09 8:52 ` Ingo Molnar
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