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From: =?iso-8859-1?Q?M=E5ns_Rullg=E5rd?= <mans@mansr.com>
To: Steven Rostedt <rostedt@goodmis.org>
Cc: Linus Torvalds <torvalds@linux-foundation.org>,
        Andy Lutomirski <luto@amacapital.net>,
        Thomas Gleixner <tglx@linutronix.de>,
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        Gleb Natapov <gleb@kernel.org>, Paolo Bonzini <pbonzini@redhat.com>
Subject: Re: [ABOMINATION] x86: Fast interrupt return to userspace
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Date: Wed, 07 May 2014 00:37:51 +0100
In-Reply-To: <20140506184922.61ba640b@gandalf.local.home> (Steven Rostedt's
	message of "Tue, 6 May 2014 18:49:22 -0400")
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Steven Rostedt <rostedt@goodmis.org> writes:

> On Tue, 6 May 2014 14:48:50 -0700
> Linus Torvalds <torvalds@linux-foundation.org> wrote:
>
>> Yeah, it's disgusting. I think it is worth fixing to get better
>> numbers (it *would* be very interesting to hear whether this plus the
>> kernel 'retq' thing actually makes real device interrupt overhead
>> lower), but I'd be very wary of using it in production.
>
> Darn it. I was actually hoping that someone else could have the
> reputation of doing "I can't believe they actually did this" code in the
> kernel.

Hey, I tried: http://article.gmane.org/gmane.linux.kernel/1594134

-- 
Måns Rullgård
mans@mansr.com