From: Peter Xu <peterx@redhat.com>
To: Paolo Bonzini <pbonzini@redhat.com>
Cc: linux-kernel@vger.kernel.org, kvm@vger.kernel.org,
stable@vger.kernel.org
Subject: Re: [PATCH] KVM: selftests: Always run vCPU thread with blocked SIG_IPI
Date: Tue, 20 Apr 2021 10:37:39 -0400 [thread overview]
Message-ID: <20210420143739.GA4440@xz-x1> (raw)
In-Reply-To: <20210420081614.684787-1-pbonzini@redhat.com>
On Tue, Apr 20, 2021 at 04:16:14AM -0400, Paolo Bonzini wrote:
> The main thread could start to send SIG_IPI at any time, even before signal
> blocked on vcpu thread. Therefore, start the vcpu thread with the signal
> blocked.
>
> Without this patch, on very busy cores the dirty_log_test could fail directly
> on receiving a SIGUSR1 without a handler (when vcpu runs far slower than main).
>
> Reported-by: Peter Xu <peterx@redhat.com>
> Cc: stable@vger.kernel.org
> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Yes, indeed better! :)
Reviewed-by: Peter Xu <peterx@redhat.com>
--
Peter Xu
next prev parent reply other threads:[~2021-04-20 14:37 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-04-20 8:16 [PATCH] KVM: selftests: Always run vCPU thread with blocked SIG_IPI Paolo Bonzini
2021-04-20 14:37 ` Peter Xu [this message]
2021-04-20 15:32 ` Peter Xu
2021-04-20 16:24 ` Paolo Bonzini
2021-04-20 16:58 ` Peter Xu
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