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kvm tools: Signal only one thread when injecting console interrupts

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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@gmail.com>
Acked-by: Ingo Molnar <mingo@elte.hu>
Suggested-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Sasha Levin <levinsasha928@gmail.com>
Signed-off-by: Pekka Enberg <penberg@kernel.org>
This commit is contained in:
Sasha Levin
2011-06-15 17:33:06 -04:00
committed by Will Deacon
parent 06761c76a4
commit c782873131
1 changed files with 3 additions and 1 deletions
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kvm.c
+3 -1
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@@ -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()");