From: Sasha Levin <levinsasha928@gmail.com>
Date: Thu, 2 Aug 2012 14:29:23 +0000 (+0200)
Subject: kvm tools: prevent guest softlockup errors when pausing
X-Git-Tag: next-20120816~7^2~5
X-Git-Url: https://git.karo-electronics.de/?a=commitdiff_plain;h=32683a394b93723365e98edc1788cd8f4226d57e;p=karo-tx-linux.git

kvm tools: prevent guest softlockup errors when pausing

Use the new KVM_KVMCLOCK_CTRL ioctl to prevent guests from wrongfully
detecting lockups when in fact they were paused.

Signed-off-by: Sasha Levin <levinsasha928@gmail.com>
Signed-off-by: Pekka Enberg <penberg@kernel.org>
---

diff --git a/tools/kvm/builtin-run.c b/tools/kvm/builtin-run.c
index 952534141f55..a36bd004c423 100644
--- a/tools/kvm/builtin-run.c
+++ b/tools/kvm/builtin-run.c
@@ -531,6 +531,7 @@ static void handle_pause(int fd, u32 type, u32 len, u8 *msg)
 		kvm__continue();
 	} else if (type == KVM_IPC_PAUSE && !is_paused) {
 		kvm->vm_state = KVM_VMSTATE_PAUSED;
+		ioctl(kvm->vm_fd, KVM_KVMCLOCK_CTRL);
 		kvm__pause();
 	} else {
 		return;