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[PULL,03/30] cpus: tcg: fix never exiting loop on unplug

Message ID 1525817687-34620-4-git-send-email-pbonzini@redhat.com
State New
Headers show
Series [PULL,01/30] configure: recognize more rpmbuild macros | expand

Commit Message

Paolo Bonzini May 8, 2018, 10:14 p.m. UTC 
From: Cédric Le Goater <clg@kaod.org>

Commit 9b0605f9837b ("cpus: tcg: unregister thread with RCU, fix
exiting of loop on unplug") changed the exit condition of the loop in
the vCPU thread function but forgot to remove the beginning 'while (1)'
statement. The resulting code :

	while (1) {
	...
	} while (!cpu->unplug || cpu_can_run(cpu));

is a sequence of two distinct two while() loops, the first not exiting
in case of an unplug event.

Remove the first while (1) to fix CPU unplug.

Signed-off-by: Cédric Le Goater <clg@kaod.org>
Message-Id: <20180425131828.15604-1-clg@kaod.org>
Cc: qemu-stable@nongnu.org
Fixes: 9b0605f9837b68fd56c7fc7c96a3a1a3b983687d
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Cédric Le Goater <clg@kaod.org>
---
 cpus.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
diff mbox series

Patch

diff --git a/cpus.c b/cpus.c
index be3a4eb..d1f1629 100644
--- a/cpus.c
+++ b/cpus.c
@@ -1648,7 +1648,7 @@  static void *qemu_tcg_cpu_thread_fn(void *arg)
     /* process any pending work */
     cpu->exit_request = 1;
 
-    while (1) {
+    do {
         if (cpu_can_run(cpu)) {
             int r;
             qemu_mutex_unlock_iothread();