From: Joel Fernandes <joel@joelfernandes.org>
To: "Paul E. McKenney" <paulmck@kernel.org>
Cc: rcu@vger.kernel.org, rushikesh.s.kadam@intel.com,
urezki@gmail.com, neeraj.iitr10@gmail.com, frederic@kernel.org,
rostedt@goodmis.org
Subject: Re: [RFC v1 01/14] rcu: Add a lock-less lazy RCU implementation
Date: Tue, 31 May 2022 21:29:15 +0000 [thread overview]
Message-ID: <YpaIqxdiOH8eGZXC@google.com> (raw)
In-Reply-To: <20220531192532.GK1790663@paulmck-ThinkPad-P17-Gen-1>
On Tue, May 31, 2022 at 12:25:32PM -0700, Paul E. McKenney wrote:
> On Tue, May 31, 2022 at 06:51:48PM +0000, Joel Fernandes wrote:
> > On Tue, May 31, 2022 at 09:45:34AM -0700, Paul E. McKenney wrote:
>
> [ . . . ]
>
> > > Here is hoping!
> > >
> > > After all, if you thought that taking care of applications that need
> > > expediting of grace periods is scary, well, now...
> >
> > Haha... my fear is I don't know all the applications requiring expedited GP
> > and I keep getting surprised by new RCU usages that pop up in the system, or
> > new systems.
> >
> > For one, a number of tools and processes, use ftrace directly in the system,
> > and it may not be practical to chase down every tool. Some of them start
> > tracing randomly in the system. Handling it in-kernel itself would be best if
> > possible.
>
> Shouldn't it be possible to hook into the kernel code that runs when
> the sysfs tracing files are updated? As in, why not both? ;-)
Yes, Point taken on this, let us do both solutions.
thanks,
- Joel
next prev parent reply other threads:[~2022-05-31 21:29 UTC|newest]
Thread overview: 73+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-05-12 3:04 [RFC v1 00/14] Implement call_rcu_lazy() and miscellaneous fixes Joel Fernandes (Google)
2022-05-12 3:04 ` [RFC v1 01/14] rcu: Add a lock-less lazy RCU implementation Joel Fernandes (Google)
2022-05-12 23:56 ` Paul E. McKenney
2022-05-14 15:08 ` Joel Fernandes
2022-05-14 16:34 ` Paul E. McKenney
2022-05-27 23:12 ` Joel Fernandes
2022-05-28 17:57 ` Paul E. McKenney
2022-05-30 14:48 ` Joel Fernandes
2022-05-30 16:42 ` Paul E. McKenney
2022-05-31 2:12 ` Joel Fernandes
2022-05-31 4:26 ` Paul E. McKenney
2022-05-31 16:11 ` Joel Fernandes
2022-05-31 16:45 ` Paul E. McKenney
2022-05-31 18:51 ` Joel Fernandes
2022-05-31 19:25 ` Paul E. McKenney
2022-05-31 21:29 ` Joel Fernandes [this message]
2022-05-31 22:44 ` Joel Fernandes
2022-06-01 14:24 ` Frederic Weisbecker
2022-06-01 16:17 ` Paul E. McKenney
2022-06-01 19:09 ` Joel Fernandes
2022-05-17 9:07 ` Uladzislau Rezki
2022-05-30 14:54 ` Joel Fernandes
2022-06-01 14:12 ` Frederic Weisbecker
2022-06-01 19:10 ` Joel Fernandes
2022-05-12 3:04 ` [RFC v1 02/14] workqueue: Add a lazy version of queue_rcu_work() Joel Fernandes (Google)
2022-05-12 23:58 ` Paul E. McKenney
2022-05-14 14:44 ` Joel Fernandes
2022-05-12 3:04 ` [RFC v1 03/14] block/blk-ioc: Move call_rcu() to call_rcu_lazy() Joel Fernandes (Google)
2022-05-13 0:00 ` Paul E. McKenney
2022-05-12 3:04 ` [RFC v1 04/14] cred: " Joel Fernandes (Google)
2022-05-13 0:02 ` Paul E. McKenney
2022-05-14 14:41 ` Joel Fernandes
2022-05-12 3:04 ` [RFC v1 05/14] fs: Move call_rcu() to call_rcu_lazy() in some paths Joel Fernandes (Google)
2022-05-13 0:07 ` Paul E. McKenney
2022-05-14 14:40 ` Joel Fernandes
2022-05-12 3:04 ` [RFC v1 06/14] kernel: Move various core kernel usages to call_rcu_lazy() Joel Fernandes (Google)
2022-05-12 3:04 ` [RFC v1 07/14] security: Move call_rcu() " Joel Fernandes (Google)
2022-05-12 3:04 ` [RFC v1 08/14] net/core: " Joel Fernandes (Google)
2022-05-12 3:04 ` [RFC v1 09/14] lib: " Joel Fernandes (Google)
2022-05-12 3:04 ` [RFC v1 10/14] kfree/rcu: Queue RCU work via queue_rcu_work_lazy() Joel Fernandes (Google)
2022-05-13 0:12 ` Paul E. McKenney
2022-05-13 14:55 ` Uladzislau Rezki
2022-05-14 14:33 ` Joel Fernandes
2022-05-14 19:10 ` Uladzislau Rezki
2022-05-12 3:04 ` [RFC v1 11/14] i915: Move call_rcu() to call_rcu_lazy() Joel Fernandes (Google)
2022-05-12 3:04 ` [RFC v1 12/14] rcu/kfree: remove useless monitor_todo flag Joel Fernandes (Google)
2022-05-13 14:53 ` Uladzislau Rezki
2022-05-14 14:35 ` Joel Fernandes
2022-05-14 19:48 ` Uladzislau Rezki
2022-05-12 3:04 ` [RFC v1 13/14] rcu/kfree: Fix kfree_rcu_shrink_count() return value Joel Fernandes (Google)
2022-05-13 14:54 ` Uladzislau Rezki
2022-05-14 14:34 ` Joel Fernandes
2022-05-12 3:04 ` [RFC v1 14/14] DEBUG: Toggle rcu_lazy and tune at runtime Joel Fernandes (Google)
2022-05-13 0:16 ` Paul E. McKenney
2022-05-14 14:38 ` Joel Fernandes
2022-05-14 16:21 ` Paul E. McKenney
2022-05-12 3:17 ` [RFC v1 00/14] Implement call_rcu_lazy() and miscellaneous fixes Joel Fernandes
2022-05-12 13:09 ` Uladzislau Rezki
2022-05-12 13:56 ` Uladzislau Rezki
2022-05-12 14:03 ` Joel Fernandes
2022-05-12 14:37 ` Uladzislau Rezki
2022-05-12 16:09 ` Joel Fernandes
2022-05-12 16:32 ` Uladzislau Rezki
[not found] ` <Yn5e7w8NWzThUARb@pc638.lan>
2022-05-13 14:51 ` Joel Fernandes
2022-05-13 15:43 ` Uladzislau Rezki
2022-05-14 14:25 ` Joel Fernandes
2022-05-14 19:01 ` Uladzislau Rezki
2022-08-09 2:25 ` Joel Fernandes
2022-05-13 0:23 ` Paul E. McKenney
2022-05-13 14:45 ` Joel Fernandes
2022-06-13 18:53 ` Joel Fernandes
2022-06-13 22:48 ` Paul E. McKenney
2022-06-16 16:26 ` Joel Fernandes
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