Groups | Search | Server Info | Keyboard shortcuts | Login | Register [http] [https] [nntp] [nntps]

Groups > linux.kernel > #1734223

Re: Query regarding synchronize_sched_expedited and resched_cpu

From Steven Rostedt <rostedt@goodmis.org>
Newsgroups linux.kernel
Subject Re: Query regarding synchronize_sched_expedited and resched_cpu
Date 2017-09-18 17:20 +0200
Message-ID <ur603-7Z6-49@gated-at.bofh.it> (permalink)
References <upWP8-22A-9@gated-at.bofh.it> <uqwfT-Yw-3@gated-at.bofh.it> <uqAWd-432-1@gated-at.bofh.it>
Organization linux.* mail to news gateway

Show all headers | View raw

On Sun, 17 Sep 2017 11:37:06 +0530
Neeraj Upadhyay <neeraju@codeaurora.org> wrote:

> Hi Paul, how about replacing raw_spin_trylock_irqsave with
> raw_spin_lock_irqsave in resched_cpu()? Are there any paths
> in RCU code, which depend on trylock check/spinlock recursion?

It looks to me that resched_cpu() was added for nohz full sched
balancing, but is not longer used by that. The only user is currently
RCU. Perhaps we should change that from a trylock to a lock.

-- Steve

Back to linux.kernel | Previous | Next — Previous in thread | Next in thread | Find similar | Unroll thread

Thread

Query regarding synchronize_sched_expedited and resched_cpu Neeraj Upadhyay <neeraju@codeaurora.org> - 2017-09-15 13:20 +0200
  Re: Query regarding synchronize_sched_expedited and resched_cpu "Paul E. McKenney" <paulmck@linux.vnet.ibm.com> - 2017-09-17 03:10 +0200
    Re: Query regarding synchronize_sched_expedited and resched_cpu Neeraj Upadhyay <neeraju@codeaurora.org> - 2017-09-17 08:10 +0200
      Re: Query regarding synchronize_sched_expedited and resched_cpu Steven Rostedt <rostedt@goodmis.org> - 2017-09-18 17:20 +0200
        Re: Query regarding synchronize_sched_expedited and resched_cpu "Paul E. McKenney" <paulmck@linux.vnet.ibm.com> - 2017-09-18 18:10 +0200
          Re: Query regarding synchronize_sched_expedited and resched_cpu Steven Rostedt <rostedt@goodmis.org> - 2017-09-18 18:20 +0200
            Re: Query regarding synchronize_sched_expedited and resched_cpu Steven Rostedt <rostedt@goodmis.org> - 2017-09-18 18:30 +0200
              Re: Query regarding synchronize_sched_expedited and resched_cpu "Paul E. McKenney" <paulmck@linux.vnet.ibm.com> - 2017-09-18 19:00 +0200
                Re: Query regarding synchronize_sched_expedited and resched_cpu "Paul E. McKenney" <paulmck@linux.vnet.ibm.com> - 2017-09-19 02:00 +0200
                Re: Query regarding synchronize_sched_expedited and resched_cpu Steven Rostedt <rostedt@goodmis.org> - 2017-09-19 03:30 +0200
                Re: Query regarding synchronize_sched_expedited and resched_cpu "Paul E. McKenney" <paulmck@linux.vnet.ibm.com> - 2017-09-19 04:30 +0200
                Re: Query regarding synchronize_sched_expedited and resched_cpu Byungchul Park <byungchul.park@lge.com> - 2017-09-19 04:00 +0200
                Re: Query regarding synchronize_sched_expedited and resched_cpu Byungchul Park <byungchul.park@lge.com> - 2017-09-19 04:10 +0200
                Re: Query regarding synchronize_sched_expedited and resched_cpu "Paul E. McKenney" <paulmck@linux.vnet.ibm.com> - 2017-09-19 04:40 +0200
                Re: Query regarding synchronize_sched_expedited and resched_cpu Byungchul Park <byungchul.park@lge.com> - 2017-09-19 04:50 +0200
                Re: Query regarding synchronize_sched_expedited and resched_cpu "Paul E. McKenney" <paulmck@linux.vnet.ibm.com> - 2017-09-19 06:10 +0200
                Re: Query regarding synchronize_sched_expedited and resched_cpu Boqun Feng <boqun.feng@gmail.com> - 2017-09-19 07:40 +0200
                Re: Query regarding synchronize_sched_expedited and resched_cpu Mike Galbraith <efault@gmx.de> - 2017-09-19 08:20 +0200
                Re: Query regarding synchronize_sched_expedited and resched_cpu Byungchul Park <byungchul.park@lge.com> - 2017-09-19 09:00 +0200
                Re: Query regarding synchronize_sched_expedited and resched_cpu "Paul E. McKenney" <paulmck@linux.vnet.ibm.com> - 2017-09-19 15:50 +0200
                Re: Query regarding synchronize_sched_expedited and resched_cpu Peter Zijlstra <peterz@infradead.org> - 2017-09-21 16:00 +0200
                Re: Query regarding synchronize_sched_expedited and resched_cpu "Paul E. McKenney" <paulmck@linux.vnet.ibm.com> - 2017-09-21 17:40 +0200
              Re: Query regarding synchronize_sched_expedited and resched_cpu Byungchul Park <byungchul.park@lge.com> - 2017-09-19 04:00 +0200
            Re: Query regarding synchronize_sched_expedited and resched_cpu "Paul E. McKenney" <paulmck@linux.vnet.ibm.com> - 2017-09-18 18:30 +0200
              Re: Query regarding synchronize_sched_expedited and resched_cpu "Paul E. McKenney" <paulmck@linux.vnet.ibm.com> - 2017-09-19 17:40 +0200
                Re: Query regarding synchronize_sched_expedited and resched_cpu Steven Rostedt <rostedt@goodmis.org> - 2017-09-19 18:00 +0200
                Re: Query regarding synchronize_sched_expedited and resched_cpu "Paul E. McKenney" <paulmck@linux.vnet.ibm.com> - 2017-09-19 18:20 +0200
                Re: Query regarding synchronize_sched_expedited and resched_cpu Peter Zijlstra <peterz@infradead.org> - 2017-09-21 16:10 +0200
                Re: Query regarding synchronize_sched_expedited and resched_cpu "Paul E. McKenney" <paulmck@linux.vnet.ibm.com> - 2017-09-21 18:10 +0200
                Re: Query regarding synchronize_sched_expedited and resched_cpu Peter Zijlstra <peterz@infradead.org> - 2017-09-21 18:40 +0200
                Re: Query regarding synchronize_sched_expedited and resched_cpu "Paul E. McKenney" <paulmck@linux.vnet.ibm.com> - 2017-09-21 18:50 +0200
        Re: Query regarding synchronize_sched_expedited and resched_cpu Peter Zijlstra <peterz@infradead.org> - 2017-09-21 16:00 +0200
          Re: Query regarding synchronize_sched_expedited and resched_cpu "Paul E. McKenney" <paulmck@linux.vnet.ibm.com> - 2017-09-21 17:40 +0200
            Re: Query regarding synchronize_sched_expedited and resched_cpu Peter Zijlstra <peterz@infradead.org> - 2017-09-21 18:20 +0200
          Re: Query regarding synchronize_sched_expedited and resched_cpu Steven Rostedt <rostedt@goodmis.org> - 2017-09-21 17:50 +0200

csiph-web