linux-kernel - Re: [PATCH v7 1/4] spinlock: A new lockref structure for lockless update of refcount

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Message-ID: <CA+55aFyY-KEvqYze56Vw4wiznEBaxjRqHFT6aVxbu_U3k66BdQ@mail.gmail.com>
Date:	Wed, 4 Sep 2013 08:14:10 -0700
From:	Linus Torvalds <torvalds@...ux-foundation.org>
To:	Waiman Long <waiman.long@...com>
Cc:	Ingo Molnar <mingo@...nel.org>, Al Viro <viro@...iv.linux.org.uk>,
	Benjamin Herrenschmidt <benh@...nel.crashing.org>,
	Jeff Layton <jlayton@...hat.com>,
	Miklos Szeredi <mszeredi@...e.cz>,
	Ingo Molnar <mingo@...hat.com>,
	Thomas Gleixner <tglx@...utronix.de>,
	linux-fsdevel <linux-fsdevel@...r.kernel.org>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	Peter Zijlstra <peterz@...radead.org>,
	Steven Rostedt <rostedt@...dmis.org>,
	Andi Kleen <andi@...stfloor.org>,
	"Chandramouleeswaran, Aswin" <aswin@...com>,
	"Norton, Scott J" <scott.norton@...com>
Subject: Re: [PATCH v7 1/4] spinlock: A new lockref structure for lockless
 update of refcount

On Wed, Sep 4, 2013 at 7:52 AM, Waiman Long <waiman.long@...com> wrote:
>
> The latest tty patches did work. The tty related spinlock contention is now
> completely gone. The short workload can now reach over 8M JPM which is the
> highest I have ever seen.

Good. And this was with the 80-core machine, so there aren't any
scalability issues hiding?

             Linus
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