From: Thomas Gleixner <tglx@linutronix.de>
To: Peter Zijlstra <peterz@infradead.org>
Cc: mingo@kernel.org, linux-kernel@vger.kernel.org,
torvalds@linux-foundation.org, fweisbec@gmail.com,
oleg@redhat.com, umgwanakikbuti@gmail.com, rostedt@goodmis.org
Subject: Re: [RFC][PATCH 09/11] sched, x86: Kill saved_preempt_count
Date: Tue, 29 Sep 2015 15:18:02 +0200 (CEST) [thread overview]
Message-ID: <alpine.DEB.2.11.1509291517520.4500@nanos> (raw)
In-Reply-To: <20150929093520.511427093@infradead.org>
On Tue, 29 Sep 2015, Peter Zijlstra wrote:
> With the introduction of the context switch preempt_count invariant,
> and the demise of PREEMPT_ACTIVE, its pointless to save/restore the
> per-cpu preemption count, it must always be 2.
Reviewed-by: Thomas Gleixner <tglx@linutronix.de>
next prev parent reply other threads:[~2015-09-29 13:19 UTC|newest]
Thread overview: 61+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-09-29 9:28 [RFC][PATCH 00/11] sched: Killing PREEMPT_ACTIVE Peter Zijlstra
2015-09-29 9:28 ` [RFC][PATCH 01/11] sched: Simplify INIT_PREEMPT_COUNT Peter Zijlstra
2015-09-29 10:30 ` [tip:sched/core] sched/core: " tip-bot for Peter Zijlstra
2015-09-29 13:19 ` [RFC][PATCH 01/11] sched: " Frederic Weisbecker
2015-09-29 14:43 ` Steven Rostedt
2015-09-29 14:47 ` Peter Zijlstra
[not found] ` <20150929103729.00899e69@gandalf.local.home>
[not found] ` <20150929143559.GL3816@twins.programming.kicks-ass.net>
2015-09-29 15:00 ` Steven Rostedt
2015-09-29 15:05 ` Peter Zijlstra
2015-09-29 9:28 ` [RFC][PATCH 02/11] sched: Create preempt_count invariant Peter Zijlstra
2015-09-29 10:30 ` [tip:sched/core] sched/core: " tip-bot for Peter Zijlstra
2015-09-29 12:55 ` [RFC][PATCH 02/11] sched: " Frederic Weisbecker
2015-09-29 13:02 ` Peter Zijlstra
2015-09-29 14:40 ` Steven Rostedt
2015-09-29 13:11 ` Thomas Gleixner
2015-09-29 14:09 ` Peter Zijlstra
2015-09-29 9:28 ` [RFC][PATCH 03/11] sched: Robustify preemption leak checks Peter Zijlstra
2015-09-29 10:31 ` [tip:sched/core] sched/core: " tip-bot for Peter Zijlstra
2015-09-29 13:13 ` [RFC][PATCH 03/11] sched: " Thomas Gleixner
2015-09-29 13:25 ` Frederic Weisbecker
2015-09-29 14:24 ` Peter Zijlstra
2015-09-29 14:32 ` Frederic Weisbecker
2015-09-29 15:07 ` Steven Rostedt
2015-09-29 15:17 ` Peter Zijlstra
2015-09-29 9:28 ` [RFC][PATCH 04/11] sched: Rework TASK_DEAD preemption exception Peter Zijlstra
2015-09-29 13:13 ` Thomas Gleixner
2015-09-29 13:41 ` Frederic Weisbecker
2015-09-29 15:10 ` Steven Rostedt
2015-09-29 9:28 ` [RFC][PATCH 05/11] sched: Add preempt argument to __schedule() Peter Zijlstra
2015-09-29 13:14 ` Thomas Gleixner
2015-09-29 13:18 ` Frederic Weisbecker
2015-09-29 15:28 ` Steven Rostedt
2015-09-29 15:30 ` Steven Rostedt
2015-09-29 15:29 ` Peter Zijlstra
2015-09-29 9:28 ` [RFC][PATCH 06/11] sched: Fix trace_sched_switch() Peter Zijlstra
2015-09-29 13:15 ` Thomas Gleixner
2015-09-29 15:38 ` Steven Rostedt
2015-09-29 15:48 ` Peter Zijlstra
2015-09-29 16:30 ` Steven Rostedt
2015-09-29 9:28 ` [RFC][PATCH 07/11] sched: Stop setting PREEMPT_ACTIVE Peter Zijlstra
2015-09-29 13:16 ` Thomas Gleixner
2015-09-29 15:41 ` Steven Rostedt
2015-09-29 16:25 ` Peter Zijlstra
2015-09-29 9:28 ` [RFC][PATCH 08/11] sched: Simplify preempt_count tests Peter Zijlstra
2015-09-29 13:17 ` Thomas Gleixner
2015-09-29 15:42 ` Steven Rostedt
2015-09-29 9:28 ` [RFC][PATCH 09/11] sched, x86: Kill saved_preempt_count Peter Zijlstra
2015-09-29 13:18 ` Thomas Gleixner [this message]
2015-09-29 15:44 ` Steven Rostedt
2015-09-29 15:46 ` Peter Zijlstra
2015-09-29 9:28 ` [RFC][PATCH 10/11] sched: Kill PREEMPT_ACTIVE Peter Zijlstra
2015-09-29 13:18 ` Thomas Gleixner
2015-09-29 15:45 ` Steven Rostedt
2015-09-29 9:28 ` [RFC][PATCH 11/11] sched: More notrace Peter Zijlstra
2015-09-29 13:19 ` Thomas Gleixner
2015-09-29 15:58 ` Steven Rostedt
2015-09-29 10:27 ` [RFC][PATCH 12/11] sched: Add preempt_count invariant check Peter Zijlstra
2015-09-29 10:32 ` Peter Zijlstra
2015-09-29 10:56 ` [RFC][PATCH v2 " Peter Zijlstra
2015-09-29 11:55 ` Linus Torvalds
2015-09-29 11:55 ` Peter Zijlstra
2015-09-29 10:34 ` [RFC][PATCH 00/11] sched: Killing PREEMPT_ACTIVE Ingo Molnar
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=alpine.DEB.2.11.1509291517520.4500@nanos \
--to=tglx@linutronix.de \
--cc=fweisbec@gmail.com \
--cc=linux-kernel@vger.kernel.org \
--cc=mingo@kernel.org \
--cc=oleg@redhat.com \
--cc=peterz@infradead.org \
--cc=rostedt@goodmis.org \
--cc=torvalds@linux-foundation.org \
--cc=umgwanakikbuti@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 an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.