From: Frederic Weisbecker <fweisbec@gmail.com>
To: "Paul E. McKenney" <paulmck@linux.vnet.ibm.com>
Cc: LKML <linux-kernel@vger.kernel.org>,
Alessio Igor Bogani <abogani@kernel.org>,
Andrew Morton <akpm@linux-foundation.org>,
Avi Kivity <avi@redhat.com>, Chris Metcalf <cmetcalf@tilera.com>,
Christoph Lameter <cl@linux.com>,
Geoff Levand <geoff@infradead.org>,
Gilad Ben Yossef <gilad@benyossef.com>,
Hakan Akkan <hakanakkan@gmail.com>,
"H. Peter Anvin" <hpa@zytor.com>, Ingo Molnar <mingo@kernel.org>,
Kevin Hilman <khilman@ti.com>,
Max Krasnyansky <maxk@qualcomm.com>,
Peter Zijlstra <peterz@infradead.org>,
Stephen Hemminger <shemminger@vyatta.com>,
Steven Rostedt <rostedt@goodmis.org>,
Sven-Thorsten Dietrich <thebigcorporation@gmail.com>,
Thomas Gleixner <tglx@linutronix.de>
Subject: Re: [PATCH 1/5] user_hooks: New user hooks subsystem
Date: Fri, 27 Jul 2012 18:58:29 +0200 [thread overview]
Message-ID: <20120727165824.GN1173@somewhere.redhat.com> (raw)
In-Reply-To: <20120727164054.GJ2442@linux.vnet.ibm.com>
On Fri, Jul 27, 2012 at 09:40:54AM -0700, Paul E. McKenney wrote:
> On Fri, Jul 27, 2012 at 05:40:30PM +0200, Frederic Weisbecker wrote:
> > Create a new subsystem that handles the hooks on kernel/user
> > boundaries currently used by RCU for its userspace extended
> > quiescent state.
> >
> > We need to pull this up from RCU into this new level of indirection
> > because these hooks are also going to be used to implement an "on
> > demand" generic virtual cputime accounting. A necessary step to
> > shutdown the tick while still accounting the cputime.
>
> So this eliminates the case where the architecture might enter an
> RCU extended quiescent state multiple times, but exit it only once?
> (I am hoping that it does...)
Yeah. It should handle that.
next prev parent reply other threads:[~2012-07-27 16:58 UTC|newest]
Thread overview: 22+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-07-27 15:40 [RFC PATCH 0/5] cputime: Generic virtual based cputime accounting Frederic Weisbecker
2012-07-27 15:40 ` [PATCH 1/5] user_hooks: New user hooks subsystem Frederic Weisbecker
2012-07-27 16:40 ` Paul E. McKenney
2012-07-27 16:58 ` Frederic Weisbecker [this message]
2012-07-30 15:08 ` Peter Zijlstra
2012-07-30 15:27 ` Steven Rostedt
2012-07-30 16:30 ` Peter Zijlstra
2012-07-30 15:51 ` Frederic Weisbecker
2012-07-30 16:07 ` Steven Rostedt
2012-07-30 16:31 ` Peter Zijlstra
2012-07-30 16:32 ` Peter Zijlstra
2012-07-31 7:06 ` Ingo Molnar
2012-07-31 10:48 ` Frederic Weisbecker
2012-07-31 14:57 ` Ingo Molnar
2012-07-31 16:14 ` Peter Zijlstra
2012-08-01 12:28 ` Frederic Weisbecker
2012-08-01 12:43 ` Steven Rostedt
2012-08-01 12:45 ` Frederic Weisbecker
2012-07-27 15:40 ` [PATCH 2/5] cputime: Don't allow virtual and irq finegrained cputime accounting simultaneously Frederic Weisbecker
2012-07-27 15:40 ` [PATCH 3/5] cputime: Allow dynamic switch between tick/virtual based cputime accounting Frederic Weisbecker
2012-07-27 15:40 ` [PATCH 4/5] cputime: Rename account_system_vtime to account_vtime Frederic Weisbecker
2012-07-27 15:40 ` [PATCH 5/5] cputime: Generic on-demand virtual cputime accounting Frederic Weisbecker
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20120727165824.GN1173@somewhere.redhat.com \
--to=fweisbec@gmail.com \
--cc=abogani@kernel.org \
--cc=akpm@linux-foundation.org \
--cc=avi@redhat.com \
--cc=cl@linux.com \
--cc=cmetcalf@tilera.com \
--cc=geoff@infradead.org \
--cc=gilad@benyossef.com \
--cc=hakanakkan@gmail.com \
--cc=hpa@zytor.com \
--cc=khilman@ti.com \
--cc=linux-kernel@vger.kernel.org \
--cc=maxk@qualcomm.com \
--cc=mingo@kernel.org \
--cc=paulmck@linux.vnet.ibm.com \
--cc=peterz@infradead.org \
--cc=rostedt@goodmis.org \
--cc=shemminger@vyatta.com \
--cc=tglx@linutronix.de \
--cc=thebigcorporation@gmail.com \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox