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Thu, 16 Jan 2020 15:46:36 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1579189607; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=xDQ2F+CNNWhXYTBTpO6p2YNrFa9rPdWT7aJ/DLw9tE8=; b=iQ5MbBwLNcZKPe0LRU3+1Ip220bIk7Xn+9TLqvBnEawl49nwHWj/GmmHD86aU9BWpkHuNR nu+0rJqf1u8nLaTcSW4ID4C7F+u6MJCTnmUjApG65C1FteQtRyIjyjCk2Lhy2Pk8/iT+/1 K866hVQeSU2wFK8zxLVBXoMOuPdChwc= From: Juan Quintela To: qemu-devel@nongnu.org Subject: [PATCH v3 3/5] migration: Don't wait in semaphore for thread we know has finished Date: Thu, 16 Jan 2020 16:46:14 +0100 Message-Id: <20200116154616.11569-4-quintela@redhat.com> In-Reply-To: <20200116154616.11569-1-quintela@redhat.com> References: <20200116154616.11569-1-quintela@redhat.com> MIME-Version: 1.0 X-Scanned-By: MIMEDefang 2.79 on 10.5.11.16 X-MC-Unique: RmL64FbqPuqBsCoUernnzQ-1 X-Mimecast-Spam-Score: 0 X-Mimecast-Originator: redhat.com Content-Transfer-Encoding: quoted-printable X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.2.x-3.x [generic] [fuzzy] X-Received-From: 205.139.110.120 X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Laurent Vivier , Paolo Bonzini , Thomas Huth , "Dr. David Alan Gilbert" , Juan Quintela Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org Sender: "Qemu-devel" X-ZohoMail-DKIM: fail (Header signature does not verify) Content-Type: text/plain; charset="utf-8" If p->quit is true for any channel, we know that it has finished for any reason. So don't wait for it, just continue. Signed-off-by: Juan Quintela --- I could be convinced that the right thing to do in that case is to just do a break instead of a continue. Each option has its own advantages/disadvantanges. --- migration/ram.c | 6 ++++++ 1 file changed, 6 insertions(+) diff --git a/migration/ram.c b/migration/ram.c index 44ca56e1ea..bc918ef28d 100644 --- a/migration/ram.c +++ b/migration/ram.c @@ -1118,6 +1118,12 @@ static void multifd_send_sync_main(RAMState *rs) MultiFDSendParams *p =3D &multifd_send_state->params[i]; =20 trace_multifd_send_sync_main_wait(p->id); + qemu_mutex_lock(&p->mutex); + if (p->quit) { + qemu_mutex_unlock(&p->mutex); + continue; + } + qemu_mutex_unlock(&p->mutex); qemu_sem_wait(&p->sem_sync); } trace_multifd_send_sync_main(multifd_send_state->packet_num); --=20 2.24.1