From: Linus Torvalds <torvalds@linux-foundation.org>
To: Waiman Long <waiman.long@hp.com>
Cc: Ingo Molnar <mingo@kernel.org>, Al Viro <viro@zeniv.linux.org.uk>,
Benjamin Herrenschmidt <benh@kernel.crashing.org>,
Jeff Layton <jlayton@redhat.com>,
Miklos Szeredi <mszeredi@suse.cz>, Ingo Molnar <mingo@redhat.com>,
Thomas Gleixner <tglx@linutronix.de>,
linux-fsdevel <linux-fsdevel@vger.kernel.org>,
Linux Kernel Mailing List <linux-kernel@vger.kernel.org>,
Peter Zijlstra <peterz@infradead.org>,
Steven Rostedt <rostedt@goodmis.org>,
Andi Kleen <andi@firstfloor.org>,
"Chandramouleeswaran, Aswin" <aswin@hp.com>,
"Norton, Scott J" <scott.norton@hp.com>
Subject: Re: [PATCH v7 1/4] spinlock: A new lockref structure for lockless update of refcount
Date: Wed, 4 Sep 2013 14:34:05 -0700 [thread overview]
Message-ID: <CA+55aFy9hywXPhAu8JVSW=a4=2ctFTvQttf+x06mo3f6_4-g3w@mail.gmail.com> (raw)
In-Reply-To: <5227892B.7030906@hp.com>
On Wed, Sep 4, 2013 at 12:25 PM, Waiman Long <waiman.long@hp.com> wrote:
>
> Yes, the perf profile was taking from an 80-core machine. There isn't any
> scalability issue hiding for the short workload on an 80-core machine.
>
> However, I am certain that more may pop up when running in an even larger
> machine like the prototype 240-core machine that our team has been testing
> on.
Sure. Please let us know, I think it's going to be interesting to see
what that shows.
SGI certainly did much larger machines, but their primary target
tended to be all user space, so they had things like "tons of
concurrent page faults in the same process" rather than filename
lookup or the tty layer.
Linus
next prev parent reply other threads:[~2013-09-04 21:34 UTC|newest]
Thread overview: 154+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-08-06 3:12 [PATCH v7 0/4] Lockless update of reference count protected by spinlock Waiman Long
2013-08-06 3:12 ` [PATCH v7 1/4] spinlock: A new lockref structure for lockless update of refcount Waiman Long
2013-08-29 1:40 ` Linus Torvalds
2013-08-29 4:44 ` Benjamin Herrenschmidt
2013-08-29 7:00 ` Ingo Molnar
2013-08-29 16:43 ` Linus Torvalds
2013-08-29 19:25 ` Linus Torvalds
2013-08-29 23:42 ` Linus Torvalds
2013-08-30 0:26 ` Benjamin Herrenschmidt
2013-08-30 0:49 ` Linus Torvalds
2013-08-30 2:06 ` Michael Neuling
2013-08-30 2:30 ` Benjamin Herrenschmidt
2013-08-30 2:35 ` Linus Torvalds
2013-08-30 2:45 ` Benjamin Herrenschmidt
2013-08-30 2:31 ` Linus Torvalds
2013-08-30 2:43 ` Benjamin Herrenschmidt
2013-08-30 7:16 ` Ingo Molnar
2013-08-30 15:28 ` Linus Torvalds
2013-08-30 3:12 ` Waiman Long
2013-08-30 3:54 ` Linus Torvalds
2013-08-30 7:55 ` Sedat Dilek
2013-08-30 8:10 ` Sedat Dilek
2013-08-30 9:27 ` Sedat Dilek
2013-08-30 9:48 ` Ingo Molnar
2013-08-30 9:56 ` Sedat Dilek
2013-08-30 9:58 ` Sedat Dilek
2013-08-30 10:29 ` Sedat Dilek
2013-08-30 10:36 ` Peter Zijlstra
2013-08-30 10:44 ` Sedat Dilek
2013-08-30 10:46 ` Sedat Dilek
2013-08-30 10:52 ` Peter Zijlstra
2013-08-30 10:57 ` Sedat Dilek
2013-08-30 14:05 ` Sedat Dilek
2013-08-30 11:19 ` Sedat Dilek
2013-08-30 10:38 ` Sedat Dilek
2013-08-30 15:34 ` Linus Torvalds
2013-08-30 15:38 ` Sedat Dilek
2013-08-30 16:12 ` Steven Rostedt
2013-08-30 16:16 ` Sedat Dilek
2013-08-30 18:42 ` Linus Torvalds
2013-08-30 16:32 ` Linus Torvalds
2013-08-30 16:37 ` Sedat Dilek
2013-08-30 16:52 ` Linus Torvalds
2013-08-30 17:11 ` Sedat Dilek
2013-08-30 17:26 ` Linus Torvalds
2013-09-01 10:01 ` Sedat Dilek
2013-09-01 10:33 ` Sedat Dilek
2013-09-01 15:32 ` Linus Torvalds
2013-09-01 15:45 ` Sedat Dilek
2013-09-01 15:55 ` Linus Torvalds
2013-09-02 10:30 ` Sedat Dilek
2013-09-02 16:09 ` David Ahern
2013-09-02 16:09 ` David Ahern
2013-09-01 20:59 ` Linus Torvalds
2013-09-01 21:23 ` Al Viro
2013-09-01 22:16 ` Linus Torvalds
2013-09-01 22:35 ` Al Viro
2013-09-01 22:44 ` Al Viro
2013-09-01 22:58 ` Linus Torvalds
2013-09-01 22:48 ` Linus Torvalds
2013-09-01 23:30 ` Al Viro
2013-09-02 0:12 ` Linus Torvalds
2013-09-02 0:50 ` Linus Torvalds
2013-09-02 0:50 ` Linus Torvalds
2013-09-02 7:05 ` Ingo Molnar
2013-09-02 16:44 ` Linus Torvalds
2013-09-03 10:15 ` Ingo Molnar
2013-09-03 15:41 ` Linus Torvalds
2013-09-03 18:34 ` Linus Torvalds
2013-09-03 19:19 ` Ingo Molnar
2013-09-03 21:05 ` Linus Torvalds
2013-09-03 21:13 ` Linus Torvalds
2013-09-03 21:34 ` Linus Torvalds
2013-09-03 21:39 ` Linus Torvalds
2013-09-03 14:08 ` Pavel Machek
2013-09-03 22:37 ` Sedat Dilek
2013-09-03 22:55 ` Dave Jones
2013-09-03 23:05 ` Sedat Dilek
2013-09-03 23:15 ` Dave Jones
2013-09-03 23:20 ` Sedat Dilek
2013-09-03 23:45 ` Sedat Dilek
2013-08-30 18:33 ` Waiman Long
2013-08-30 18:53 ` Linus Torvalds
2013-08-30 19:20 ` Waiman Long
2013-08-30 19:33 ` Linus Torvalds
2013-08-30 20:15 ` Waiman Long
2013-08-30 20:43 ` Linus Torvalds
2013-08-30 20:54 ` Al Viro
2013-08-30 21:03 ` Linus Torvalds
2013-08-30 21:44 ` Al Viro
2013-08-30 22:30 ` Linus Torvalds
2013-08-31 21:23 ` Al Viro
2013-08-31 22:49 ` Linus Torvalds
2013-08-31 23:27 ` Al Viro
2013-09-01 0:13 ` Al Viro
2013-09-01 17:48 ` Al Viro
2013-09-09 8:30 ` Peter Zijlstra
2013-08-30 21:10 ` Waiman Long
2013-08-30 21:22 ` Linus Torvalds
2013-08-30 21:30 ` Al Viro
2013-08-30 21:42 ` Waiman Long
2013-08-30 19:40 ` Al Viro
2013-08-30 19:52 ` Waiman Long
2013-08-30 20:26 ` Al Viro
2013-08-30 20:35 ` Waiman Long
2013-08-30 20:48 ` Al Viro
2013-08-31 2:02 ` Waiman Long
2013-08-31 2:35 ` Al Viro
2013-08-31 2:42 ` Al Viro
2013-09-02 19:25 ` Waiman Long
2013-09-03 6:01 ` Ingo Molnar
2013-09-03 7:24 ` Sedat Dilek
2013-09-03 15:38 ` Linus Torvalds
2013-09-03 15:14 ` Waiman Long
2013-09-03 15:34 ` Linus Torvalds
2013-09-03 19:09 ` Linus Torvalds
2013-09-03 21:01 ` Waiman Long
2013-09-04 14:52 ` Waiman Long
2013-09-04 15:14 ` Linus Torvalds
2013-09-04 19:25 ` Waiman Long
2013-09-04 21:34 ` Linus Torvalds [this message]
2013-09-05 2:35 ` Waiman Long
2013-09-05 13:31 ` Ingo Molnar
2013-09-05 17:33 ` Waiman Long
2013-09-05 17:40 ` Ingo Molnar
2013-09-03 22:41 ` Sedat Dilek
2013-09-03 23:11 ` Sedat Dilek
2013-09-03 23:11 ` Sedat Dilek
2013-09-08 21:45 ` Linus Torvalds
2013-09-09 0:03 ` Al Viro
2013-09-09 0:25 ` Linus Torvalds
2013-09-09 0:35 ` Al Viro
2013-09-09 0:38 ` Linus Torvalds
2013-09-09 0:57 ` Al Viro
2013-09-09 2:09 ` Ramkumar Ramachandra
2013-09-09 0:30 ` Al Viro
2013-09-09 3:32 ` Linus Torvalds
2013-09-09 4:06 ` Ramkumar Ramachandra
2013-09-09 5:44 ` Al Viro
2013-08-30 17:17 ` Peter Zijlstra
2013-08-30 17:28 ` Linus Torvalds
2013-08-30 17:33 ` Linus Torvalds
2013-08-29 15:20 ` Waiman Long
2013-08-06 3:12 ` [PATCH v7 2/4] spinlock: Enable x86 architecture to do lockless refcount update Waiman Long
2013-08-06 3:12 ` [PATCH v7 3/4] dcache: replace d_lock/d_count by d_lockcnt Waiman Long
2013-08-06 3:12 ` [PATCH v7 4/4] dcache: Enable lockless update of dentry's refcount Waiman Long
2013-08-13 18:03 ` [PATCH v7 0/4] Lockless update of reference count protected by spinlock Waiman Long
2013-08-31 3:06 [PATCH v7 1/4] spinlock: A new lockref structure for lockless update of refcount George Spelvin
2013-08-31 17:16 ` Linus Torvalds
2013-09-01 8:50 ` George Spelvin
2013-09-01 11:10 ` Theodore Ts'o
2013-09-01 15:49 ` Linus Torvalds
2013-09-01 18:11 ` Steven Rostedt
2013-09-01 20:03 ` Linus Torvalds
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