Module Name: src
Committed By: bouyer
Date: Tue May 31 12:52:59 UTC 2022
Modified Files:
src/sys/arch/xen/x86: hypervisor_machdep.c
Log Message:
stipending(): if we're going to process some interrupts don't return 0.
Hopefully fixes random hang seen in i386 Xen PV.
The bug has been there ~forever but was masked by the fact that spllower()
did call event handlers much more often.
To generate a diff of this commit:
cvs rdiff -u -r1.40 -r1.41 src/sys/arch/xen/x86/hypervisor_machdep.c
Please note that diffs are not public domain; they are subject to the
copyright notices on the relevant files.
Modified files:
Index: src/sys/arch/xen/x86/hypervisor_machdep.c
diff -u src/sys/arch/xen/x86/hypervisor_machdep.c:1.40 src/sys/arch/xen/x86/hypervisor_machdep.c:1.41
--- src/sys/arch/xen/x86/hypervisor_machdep.c:1.40 Thu May 19 09:54:27 2022
+++ src/sys/arch/xen/x86/hypervisor_machdep.c Tue May 31 12:52:59 2022
@@ -1,4 +1,4 @@
-/* $NetBSD: hypervisor_machdep.c,v 1.40 2022/05/19 09:54:27 bouyer Exp $ */
+/* $NetBSD: hypervisor_machdep.c,v 1.41 2022/05/31 12:52:59 bouyer Exp $ */
/*
*
@@ -54,7 +54,7 @@
#include <sys/cdefs.h>
-__KERNEL_RCSID(0, "$NetBSD: hypervisor_machdep.c,v 1.40 2022/05/19 09:54:27 bouyer Exp $");
+__KERNEL_RCSID(0, "$NetBSD: hypervisor_machdep.c,v 1.41 2022/05/31 12:52:59 bouyer Exp $");
#include <sys/param.h>
#include <sys/systm.h>
@@ -208,6 +208,7 @@ stipending(void)
*/
while (vci->evtchn_upcall_pending) {
+ ret = 1;
x86_disable_intr();
vci->evtchn_upcall_pending = 0;
