linux-kernel - [tip:irq/core] genirq/cpuhotplug: Set force affinity flag on hotplug migration

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Date:   Thu, 22 Jun 2017 09:57:12 -0700
From:   tip-bot for Thomas Gleixner <tipbot@...or.com>
To:     linux-tip-commits@...r.kernel.org
Cc:     axboe@...nel.dk, peterz@...radead.org, mingo@...nel.org,
        hpa@...or.com, hch@....de, marc.zyngier@....com,
        tglx@...utronix.de, keith.busch@...el.com,
        linux-kernel@...r.kernel.org, mpe@...erman.id.au
Subject: [tip:irq/core] genirq/cpuhotplug: Set force affinity flag on
 hotplug migration

Commit-ID:  77f85e66aa8be563ae5804eebf74a78ec6ef5555
Gitweb:     http://git.kernel.org/tip/77f85e66aa8be563ae5804eebf74a78ec6ef5555
Author:     Thomas Gleixner <tglx@...utronix.de>
AuthorDate: Tue, 20 Jun 2017 01:37:31 +0200
Committer:  Thomas Gleixner <tglx@...utronix.de>
CommitDate: Thu, 22 Jun 2017 18:21:18 +0200

genirq/cpuhotplug: Set force affinity flag on hotplug migration

Set the force migration flag when migrating interrupts away from an
outgoing CPU.

Signed-off-by: Thomas Gleixner <tglx@...utronix.de>
Cc: Jens Axboe <axboe@...nel.dk>
Cc: Marc Zyngier <marc.zyngier@....com>
Cc: Michael Ellerman <mpe@...erman.id.au>
Cc: Keith Busch <keith.busch@...el.com>
Cc: Peter Zijlstra <peterz@...radead.org>
Cc: Christoph Hellwig <hch@....de>
Link: http://lkml.kernel.org/r/20170619235445.681874648@linutronix.de

---
 kernel/irq/cpuhotplug.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/kernel/irq/cpuhotplug.c b/kernel/irq/cpuhotplug.c
index 6f46587..e09cb91 100644
--- a/kernel/irq/cpuhotplug.c
+++ b/kernel/irq/cpuhotplug.c
@@ -79,7 +79,7 @@ static bool migrate_one_irq(struct irq_desc *desc)
 		brokeaff = true;
 	}
 
-	err = irq_do_set_affinity(d, affinity, false);
+	err = irq_do_set_affinity(d, affinity, true);
 	if (err) {
 		pr_warn_ratelimited("IRQ%u: set affinity failed(%d).\n",
 				    d->irq, err);