linux-kernel - Re: Question about usage of RCU in the input layer

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Date:	Sat, 21 Mar 2009 11:58:46 -0700
From:	"Paul E. McKenney" <paulmck@...ux.vnet.ibm.com>
To:	Arjan van de Ven <arjan@...radead.org>
Cc:	dipankar@...ibm.com, linux-input@...r.kernel.org,
	dmitry.torokhov@...il.com, linux-kernel@...r.kernel.org
Subject: Re: Question about usage of RCU in the input layer

On Fri, Mar 20, 2009 at 09:58:25PM -0700, Arjan van de Ven wrote:
> On Fri, 20 Mar 2009 18:27:46 -0700
> "Paul E. McKenney" <paulmck@...ux.vnet.ibm.com> wrote:
> 
> > > I've seen only this (input) one to take a long time
> > 
> > Ouch!!!  A -single- synchronize_rcu() taking a full second???  That
> > indicates breakage.
> 
> I'll do a debug mode tomorrow and visualize it as part of the bootgraph;
> hopefully it'll be an interesting result.
> I'll share the graph when I have it....

Looking forward to seeing it!!!

							Thanx, Paul
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