2018-07-05 23:54:02 +02:00
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From 337d0fd9226878e4407f0cdb7f44a03377df8cf6 Mon Sep 17 00:00:00 2001
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2018-05-25 20:04:13 +02:00
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From: =?UTF-8?q?C=C3=A9dric=20Le=20Goater?= <clg@kaod.org>
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Date: Wed, 25 Apr 2018 15:18:28 +0200
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Subject: [PATCH] cpus: tcg: fix never exiting loop on unplug
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MIME-Version: 1.0
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Content-Type: text/plain; charset=UTF-8
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Content-Transfer-Encoding: 8bit
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Commit 9b0605f9837b ("cpus: tcg: unregister thread with RCU, fix
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exiting of loop on unplug") changed the exit condition of the loop in
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the vCPU thread function but forgot to remove the beginning 'while (1)'
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statement. The resulting code :
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while (1) {
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...
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} while (!cpu->unplug || cpu_can_run(cpu));
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is a sequence of two distinct two while() loops, the first not exiting
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in case of an unplug event.
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Remove the first while (1) to fix CPU unplug.
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Signed-off-by: Cédric Le Goater <clg@kaod.org>
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Message-Id: <20180425131828.15604-1-clg@kaod.org>
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Cc: qemu-stable@nongnu.org
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Fixes: 9b0605f9837b68fd56c7fc7c96a3a1a3b983687d
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Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
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Signed-off-by: Cédric Le Goater <clg@kaod.org>
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(cherry picked from commit 54961aac190df28d311802364d19e18d5cda8bab)
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Signed-off-by: Bruce Rogers <brogers@suse.com>
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---
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cpus.c | 2 +-
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1 file changed, 1 insertion(+), 1 deletion(-)
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diff --git a/cpus.c b/cpus.c
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index ef39603cf9..b13112b8e2 100644
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--- a/cpus.c
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+++ b/cpus.c
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@@ -1648,7 +1648,7 @@ static void *qemu_tcg_cpu_thread_fn(void *arg)
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/* process any pending work */
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cpu->exit_request = 1;
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- while (1) {
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+ do {
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if (cpu_can_run(cpu)) {
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int r;
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qemu_mutex_unlock_iothread();
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