From: Steven Rostedt <rostedt@goodmis.org>
To: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Andy Lutomirski <luto@amacapital.net>,
Thomas Gleixner <tglx@linutronix.de>,
Linux Kernel Mailing List <linux-kernel@vger.kernel.org>,
"the arch/x86 maintainers" <x86@kernel.org>,
Gleb Natapov <gleb@kernel.org>,
Paolo Bonzini <pbonzini@redhat.com>
Subject: Re: [ABOMINATION] x86: Fast interrupt return to userspace
Date: Tue, 6 May 2014 18:49:22 -0400 [thread overview]
Message-ID: <20140506184922.61ba640b@gandalf.local.home> (raw)
In-Reply-To: <CA+55aFx8UQGS_anYJrSkkzeM+vx97-2sAUTTE6ZxDJNUKTkD0Q@mail.gmail.com>
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.
-- Steve
next prev parent reply other threads:[~2014-05-06 22:49 UTC|newest]
Thread overview: 11+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-05-06 20:29 [ABOMINATION] x86: Fast interrupt return to userspace Andy Lutomirski
2014-05-06 20:35 ` Linus Torvalds
2014-05-06 21:00 ` Linus Torvalds
2014-05-06 21:25 ` Linus Torvalds
2014-05-06 21:34 ` Andy Lutomirski
2014-05-06 21:48 ` Linus Torvalds
2014-05-06 22:49 ` Steven Rostedt [this message]
2014-05-06 23:37 ` Måns Rullgård
2014-05-07 11:14 ` Ingo Molnar
2014-05-07 15:27 ` Andy Lutomirski
2014-05-06 21:40 ` Linus Torvalds
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