Send signals only to the thread which handles console injection
instead of the entire process.
This prevents every single thread from having to ignore SIGALRM
and will help scaling when running large amount of VCPU threads.
Suggested-by: Ingo Molnar <mingo@xxxxxxx>
Signed-off-by: Sasha Levin <levinsasha928@xxxxxxxxx>
---
tools/kvm/kvm.c | 4 +++-
1 files changed, 3 insertions(+), 1 deletions(-)
diff --git a/tools/kvm/kvm.c b/tools/kvm/kvm.c
index 2c56a79..22871db 100644
--- a/tools/kvm/kvm.c
+++ b/tools/kvm/kvm.c
@@ -28,6 +28,7 @@
#include <fcntl.h>
#include <time.h>
#include <sys/eventfd.h>
+#include <asm/unistd.h>
#define DEFINE_KVM_EXIT_REASON(reason) [reason] = #reason
@@ -529,8 +530,9 @@ void kvm__start_timer(struct kvm *kvm)
memset(&sev, 0, sizeof(struct sigevent));
sev.sigev_value.sival_int = 0;
- sev.sigev_notify = SIGEV_SIGNAL;
+ sev.sigev_notify = SIGEV_THREAD_ID;
sev.sigev_signo = SIGALRM;
+ sev._sigev_un._tid = syscall(__NR_gettid);
if (timer_create(CLOCK_REALTIME, &sev, &kvm->timerid) < 0)
die("timer_create()");
--
1.7.5.3
--
To unsubscribe from this list: send the line "unsubscribe kvm" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html
