From: "Yann E. MORIN" <yann.morin.1998@free.fr>
To: "Paul E. McKenney" <paulmck@linux.vnet.ibm.com>
Cc: "Geert Uytterhoeven" <geert@linux-m68k.org>,
"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
"Ingo Molnar" <mingo@elte.hu>,
laijs@cn.fujitsu.com, dipankar@in.ibm.com,
"Andrew Morton" <akpm@linux-foundation.org>,
"Mathieu Desnoyers" <mathieu.desnoyers@polymtl.ca>,
josh@joshtriplett.org, niv@us.ibm.com,
"Thomas Gleixner" <tglx@linutronix.de>,
"Peter Zijlstra" <peterz@infradead.org>,
"Steven Rostedt" <rostedt@goodmis.org>,
"David Howells" <dhowells@redhat.com>,
edumazet@google.com, darren@dvhart.com,
"Frédéric Weisbecker" <fweisbec@gmail.com>,
sbw@mit.edu, Linux-Arch <linux-arch@vger.kernel.org>,
linux-kbuild <linux-kbuild@vger.kernel.org>
Subject: Re: [PATCH tip/core/rcu 8/9] nohz_full: Add full-system-idle state machine
Date: Sun, 8 Sep 2013 12:32:50 +0200 [thread overview]
Message-ID: <20130908103250.GA3698@free.fr> (raw)
In-Reply-To: <20130907185710.GF3966@linux.vnet.ibm.com>
Paul, All,
On 2013-09-07 11:57 -0700, Paul E. McKenney spake thusly:
> On Sat, Sep 07, 2013 at 11:13:48AM +0200, Yann E. MORIN wrote:
[--SNIP--]
> > I'll see if I can come up with a meaningfull construct that fixes your
> > use-case. Don't hold your breath, though! ;-)
>
> If not, we need to add NR_CPUS to the architectures lacking them...
Unfortunately, I was not able to come up with anything suitable.
I think your proposal to always define NR_CPUS=1 for architectures
without SMP support is a good solution.
After all, if !SMP because the architecture does not support it, I
believe it makes sense that NR_CPUS be defined to 1.
Unless NR_CPUS carries with it a hidden meaning about SMP being
possible, that is, which would probably be wrong anyway, since we have
SMP for this.
Regards,
Yann E. MORIN.
--
.-----------------.--------------------.------------------.--------------------.
| Yann E. MORIN | Real-Time Embedded | /"\ ASCII RIBBON | Erics' conspiracy: |
| +33 662 376 056 | Software Designer | \ / CAMPAIGN | ___ |
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next prev parent reply other threads:[~2013-09-08 10:32 UTC|newest]
Thread overview: 25+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-08-20 2:47 [PATCH tip/core/rcu 0/9] v2 sysidle changes for 3.12 Paul E. McKenney
2013-08-20 2:47 ` [PATCH tip/core/rcu 1/9] rcu: Eliminate unused APIs intended for adaptive ticks Paul E. McKenney
2013-08-20 2:47 ` [PATCH tip/core/rcu 2/9] nohz_full: Add testing information to documentation Paul E. McKenney
2013-08-20 2:47 ` [PATCH tip/core/rcu 3/9] nohz_full: Add Kconfig parameter for scalable detection of all-idle state Paul E. McKenney
2013-08-20 2:47 ` [PATCH tip/core/rcu 4/9] nohz_full: Add rcu_dyntick data " Paul E. McKenney
2013-08-20 2:47 ` [PATCH tip/core/rcu 5/9] nohz_full: Add per-CPU idle-state tracking Paul E. McKenney
2013-08-20 2:47 ` [PATCH tip/core/rcu 6/9] nohz_full: Add full-system idle states and variables Paul E. McKenney
2013-08-20 2:47 ` [PATCH tip/core/rcu 7/9] nohz_full: Add full-system-idle arguments to API Paul E. McKenney
2013-08-20 2:47 ` [PATCH tip/core/rcu 8/9] nohz_full: Add full-system-idle state machine Paul E. McKenney
2013-08-26 5:45 ` Lai Jiangshan
2013-08-26 16:24 ` Paul E. McKenney
2013-08-27 3:41 ` Lai Jiangshan
2013-08-31 21:20 ` Paul E. McKenney
2013-09-06 8:08 ` Geert Uytterhoeven
2013-09-06 17:30 ` Paul E. McKenney
2013-09-06 18:50 ` Geert Uytterhoeven
2013-09-06 19:32 ` Paul E. McKenney
2013-09-07 11:22 ` Geert Uytterhoeven
2013-09-07 18:59 ` Paul E. McKenney
2013-09-07 9:13 ` Yann E. MORIN
2013-09-07 18:57 ` Paul E. McKenney
2013-09-08 10:32 ` Yann E. MORIN [this message]
2013-09-08 10:46 ` Frederic Weisbecker
2013-08-20 2:47 ` [PATCH tip/core/rcu 9/9] nohz_full: Force RCU's grace-period kthreads onto timekeeping CPU Paul E. McKenney
-- strict thread matches above, loose matches on Subject: below --
2013-08-18 1:49 [PATCH tip/core/rcu 0/9] sysidle changes for v3.12 Paul E. McKenney
2013-08-18 1:49 ` [PATCH tip/core/rcu 1/9] rcu: Eliminate unused APIs intended for adaptive ticks Paul E. McKenney
2013-08-18 1:49 ` [PATCH tip/core/rcu 8/9] nohz_full: Add full-system-idle state machine Paul E. McKenney
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