linux-kernel - Re: [PATCH 000/208] big x86 FPU code rewrite

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Date:	Tue, 5 May 2015 10:14:23 -0700
From:	Linus Torvalds <torvalds@...ux-foundation.org>
To:	Ingo Molnar <mingo@...nel.org>
Cc:	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	Andy Lutomirski <luto@...capital.net>,
	Borislav Petkov <bp@...en8.de>,
	Dave Hansen <dave.hansen@...ux.intel.com>,
	Fenghua Yu <fenghua.yu@...el.com>,
	"H. Peter Anvin" <hpa@...or.com>, Oleg Nesterov <oleg@...hat.com>,
	Thomas Gleixner <tglx@...utronix.de>
Subject: Re: [PATCH 000/208] big x86 FPU code rewrite

On Tue, May 5, 2015 at 9:23 AM, Ingo Molnar <mingo@...nel.org> wrote:
>  83 files changed, 3742 insertions(+), 2841 deletions(-)

How much of this is just the added instrumentation? Because that's
almost a thousand new lines, which makes me unhappy. The *last* thing
we want is to make this thing bigger. I'm not convinced it's worth it
adding some performance debug code that doesn't really add any new
information, and could be done outside the kernel as just an
independent module instead.

                       Linus
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