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Message-ID: <20221210133425.4657985e@gandalf.local.home> Date: Sat, 10 Dec 2022 13:34:25 -0500 From: Steven Rostedt <rostedt@...dmis.org> To: "Paul E. McKenney" <paulmck@...nel.org> Cc: linux-kernel@...r.kernel.org, Masami Hiramatsu <mhiramat@...nel.org>, Andrew Morton <akpm@...ux-foundation.org>, Karol Herbst <karolherbst@...il.com>, Pekka Paalanen <ppaalanen@...il.com>, Dave Hansen <dave.hansen@...ux.intel.com>, Andy Lutomirski <luto@...nel.org>, Peter Zijlstra <peterz@...radead.org>, Thomas Gleixner <tglx@...utronix.de>, Ingo Molnar <mingo@...nel.org>, Borislav Petkov <bp@...en8.de> Subject: Re: [for-next][PATCH 13/25] x86/mm/kmmio: Use rcu_read_lock_sched_notrace() On Sat, 10 Dec 2022 09:47:53 -0800 "Paul E. McKenney" <paulmck@...nel.org> wrote: > > Note, the preempt_disable() is still needed as it uses preempt_enable_no_resched(). > > ... > Executable code can be the best form of comment. ;-) > > This does mess with preempt_count() redundantly, but the overhead from > that should be way down in the noise. I was going to remove it, but then I realized that it would be a functional change, as from the comment above, it uses "preempt_enable_no_resched(), which there is not a rcu_read_unlock_sched() variant. > > Acked-by: Paul E. McKenney <paulmck@...nel.org> Thanks! I'll add this to the commit. -- Steve
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