Commit-ID: f6c26ccc19c270c2494c5d9dc67c1da351e475ca
Gitweb: http://git.kernel.org/tip/f6c26ccc19c270c2494c5d9dc67c1da351e475ca
Author: Sasha Levin <levinsasha928@xxxxxxxxx>
AuthorDate: Wed, 15 Jun 2011 17:33:06 -0400
Committer: Pekka Enberg <penberg@xxxxxxxxxx>
CommitDate: Thu, 16 Jun 2011 17:06:51 +0300
kvm tools: Signal only one thread when injecting console interrupts
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.
Tested-by: Asias He <asias.hejun@xxxxxxxxx>
Acked-by: Ingo Molnar <mingo@xxxxxxx>
Suggested-by: Ingo Molnar <mingo@xxxxxxx>
Signed-off-by: Sasha Levin <levinsasha928@xxxxxxxxx>
Signed-off-by: Pekka Enberg <penberg@xxxxxxxxxx>
---
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 8874cf9..c400c70 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()");
--
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