From: "Paul E. McKenney" <paulmck@linux.vnet.ibm.com>
To: Peter Zijlstra <peterz@infradead.org>
Cc: Dave Hansen <dave@sr71.net>, Andi Kleen <ak@linux.intel.com>,
dave.hansen@linux.intel.com, akpm@linux-foundation.org,
jack@suse.cz, viro@zeniv.linux.org.uk, eparis@redhat.com,
john@johnmccutchan.com, rlove@rlove.org,
tim.c.chen@linux.intel.com, linux-kernel@vger.kernel.org
Subject: Re: [RFC][PATCH] fs: optimize inotify/fsnotify code for unwatched files
Date: Mon, 22 Jun 2015 17:31:19 -0700 [thread overview]
Message-ID: <20150623003119.GF3892@linux.vnet.ibm.com> (raw)
In-Reply-To: <20150622190308.GY3644@twins.programming.kicks-ass.net>
On Mon, Jun 22, 2015 at 09:03:08PM +0200, Peter Zijlstra wrote:
> On Mon, Jun 22, 2015 at 09:29:49AM -0700, Paul E. McKenney wrote:
>
> > I believe that there still are some cases. But why would offline
> > CPUs seem so iffy? CPUs coming up execute code before they are fully
> > operational, and during that time, much of the kernel views them as
> > being offline. Yet they do have to execute significant code in order
> > to get themselves set up.
>
> I'm thinking we do far too much during bringup and tear-down as it is.
> But yes maybe.
Boot, suspend, and hibernation indeed would be faster if we did less,
but we still will have to do something.
Thanx, Paul
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next prev parent reply other threads:[~2015-06-23 0:31 UTC|newest]
Thread overview: 20+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-06-19 21:50 [RFC][PATCH] fs: optimize inotify/fsnotify code for unwatched files Dave Hansen
2015-06-19 23:33 ` Andi Kleen
2015-06-20 0:29 ` Paul E. McKenney
2015-06-20 0:39 ` Dave Hansen
2015-06-20 2:21 ` Paul E. McKenney
2015-06-20 18:02 ` Dave Hansen
2015-06-21 1:30 ` Paul E. McKenney
2015-06-22 13:28 ` Peter Zijlstra
2015-06-22 15:11 ` Paul E. McKenney
2015-06-22 15:20 ` Peter Zijlstra
2015-06-22 16:29 ` Paul E. McKenney
2015-06-22 19:03 ` Peter Zijlstra
2015-06-23 0:31 ` Paul E. McKenney [this message]
2015-06-22 18:50 ` Dave Hansen
2015-06-23 0:26 ` Paul E. McKenney
2015-06-24 16:50 ` Dave Hansen
2015-06-24 17:29 ` Paul E. McKenney
2015-06-22 18:52 ` Peter Zijlstra
2015-06-23 0:29 ` Paul E. McKenney
2015-06-23 15:17 ` Jan Kara
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