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From: Thomas Gleixner <tglx@linutronix.de>
To: Wanpeng Li <kernellwp@gmail.com>
Cc: Peter Zijlstra <peterz@infradead.org>,
	"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
	Wanpeng Li <wanpeng.li@hotmail.com>
Subject: Re: [PATCH] x86/apic: Fix suspicious RCU usage in smp_trace_call_function_interrupt
Date: Wed, 12 Oct 2016 15:17:50 +0200 (CEST)	[thread overview]
Message-ID: <alpine.DEB.2.20.1610121516220.8572@nanos> (raw)
In-Reply-To: <CANRm+Cz_Y1-YDp+E7A6ibN3HZbomf29+8E4126trGUjcxSQ24g@mail.gmail.com>

On Wed, 12 Oct 2016, Wanpeng Li wrote:
> irq_enter() which is called in scheduler_ipi() is too late to tell RCU
> susbstems to end the extended quiescent state before ack_APIC_irq(),
> any ideas?

You can call irq_enter/exit() in __smp_reschedule_interrupt(). It can be
called nested.

Thanks,

	tglx

  reply	other threads:[~2016-10-12 13:20 UTC|newest]

Thread overview: 8+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2016-09-15  6:22 Wanpeng Li
2016-09-15  8:58 ` Thomas Gleixner
2016-09-18  8:32   ` Wanpeng Li
2016-09-18 11:35   ` Wanpeng Li
2016-09-19  8:10   ` Peter Zijlstra
2016-10-12 11:07     ` Wanpeng Li
2016-10-12 13:17       ` Thomas Gleixner [this message]
2016-10-13 12:19         ` Wanpeng Li

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