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From: Greg KH <gregkh@linuxfoundation.org>
To: Fengguang Wu <fengguang.wu@intel.com>
Cc: Peter Hurley <peter@hurleysoftware.com>,
	LKML <linux-kernel@vger.kernel.org>,
	lkp@01.org, Tejun Heo <tj@kernel.org>
Subject: Re: increased vmap_area_lock contentions on "n_tty: Move buffers into n_tty_data"
Date: Thu, 12 Sep 2013 20:17:00 -0700	[thread overview]
Message-ID: <20130913031700.GB23757@kroah.com> (raw)
In-Reply-To: <20130913005133.GA32479@localhost>

On Fri, Sep 13, 2013 at 08:51:33AM +0800, Fengguang Wu wrote:
> Hi Peter,
> 
> FYI, we noticed much increased vmap_area_lock contentions since this
> commit:

What does that mean?  What is happening, are we allocating/removing more
memory now?

What type of load were you running that showed this problem?

thanks,

greg k-h

  parent reply	other threads:[~2013-09-13  3:16 UTC|newest]

Thread overview: 29+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2013-09-13  0:51 Fengguang Wu
2013-09-13  1:09 ` Fengguang Wu
2013-09-17 15:34   ` Peter Hurley
2013-09-17 23:22     ` Fengguang Wu
2013-09-18  0:22       ` Peter Hurley
2013-09-25  9:04         ` Lin Ming
2013-09-25 11:30           ` Peter Hurley
2013-09-25 14:53             ` Lin Ming
2013-09-25 16:02             ` Lin Ming
2013-09-26  3:20               ` Andi Kleen
2013-09-26 11:52                 ` Peter Hurley
2013-09-26 15:32                   ` Andi Kleen
2013-09-26 17:22                     ` Peter Hurley
2013-09-26  7:33         ` Andrew Morton
2013-09-26 11:31           ` Peter Hurley
2013-09-26 15:04             ` Greg KH
2013-09-26 17:35               ` Peter Hurley
2013-09-26 18:05                 ` Andrew Morton
2013-09-26 21:42                   ` Peter Hurley
2013-09-26 21:58                     ` Andrew Morton
2013-09-26 22:21                       ` Peter Hurley
2013-09-18  0:49   ` Peter Hurley
2013-09-13  3:17 ` Greg KH [this message]
2013-09-13  3:38   ` Fengguang Wu
2013-09-13  3:44     ` Greg KH
2013-09-13  9:55       ` Peter Hurley
2013-09-13 12:34         ` Greg KH
2013-09-17  2:42     ` Peter Hurley
2013-09-17  2:56       ` Fengguang Wu

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