From patchwork Thu May 26 16:35:49 2016 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Alvise Rigo X-Patchwork-Id: 626798 Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@bilbo.ozlabs.org Received: from lists.gnu.org (lists.gnu.org [IPv6:2001:4830:134:3::11]) (using TLSv1 with cipher AES256-SHA (256/256 bits)) (No client certificate requested) by ozlabs.org (Postfix) with ESMTPS id 3rFwB93y1Qz9t3Z for ; Fri, 27 May 2016 02:50:25 +1000 (AEST) Authentication-Results: ozlabs.org; dkim=fail reason="signature verification failed" (2048-bit key; unprotected) header.d=virtualopensystems-com.20150623.gappssmtp.com header.i=@virtualopensystems-com.20150623.gappssmtp.com header.b=zPgnMjRa; dkim-atps=neutral Received: from localhost ([::1]:39564 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1b5yUJ-0003VC-6c for incoming@patchwork.ozlabs.org; Thu, 26 May 2016 12:50:23 -0400 Received: from eggs.gnu.org ([2001:4830:134:3::10]:58621) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1b5yGr-0006fU-9A for qemu-devel@nongnu.org; Thu, 26 May 2016 12:36:32 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1b5yGm-0003oU-Ba for qemu-devel@nongnu.org; Thu, 26 May 2016 12:36:28 -0400 Received: from mail-wm0-x241.google.com ([2a00:1450:400c:c09::241]:34798) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1b5yGm-0003oI-0x for qemu-devel@nongnu.org; Thu, 26 May 2016 12:36:24 -0400 Received: by mail-wm0-x241.google.com with SMTP id n129so6555334wmn.1 for ; Thu, 26 May 2016 09:36:23 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=virtualopensystems-com.20150623.gappssmtp.com; s=20150623; h=from:to:cc:subject:date:message-id:in-reply-to:references; bh=4ITaZRZFSFmw9LjKnXXtaO/7Fwswj8cgf3W9hvWGHnM=; b=zPgnMjRah/efoHUMd4cEu9Nko7BeI/uO/C8BpbYIJRIAyWlO4nZhyh/N9shzRo7ztX s31gfjXKa2/MlYHyGY5bGS+4y23Hh5s7/fCOM9PmP4z/UOHEfrKMPR/C/pHJ7zpfeyAr 7A64JjUzFs8A0zlwCuTQsQeHoz9iwuOAeS+fHvWwfCzlZwVb457uS8YLE8AOpwDI4vDg o1s424pFqQYqM5y/eanmfZLW7aQ+DetuP85OGWCKhVvFunqB7gSKrRcCiQeJXdftM+ik zuOffRJGUYcQSA8foHpw3a3yQLz5SMKr0rDn9zds6LjTPtLtixmodm7h1Ix1ijGGESsq 0OrA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20130820; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references; bh=4ITaZRZFSFmw9LjKnXXtaO/7Fwswj8cgf3W9hvWGHnM=; b=FzOGQrSpQMSf2rBXQybdMC3RzfMjfWoyeWpeKkaUOD8bW1uwDuJTXigzyiSm2bAjT1 XBHF+3CE9eX1xNFmeL+MxlxRV+NpVBNcT0/jQBT1Dzh10L+LzI7dYwi8jRf9Jr9iBZaX S/0Xv83L+RoGqBmsh1eNpmThUTjBndbe4+JvAIncJEiNVKBPY1w0iPbvqTYTkj5JPRYD JXcKFs5ImSUlnvwusDDdRVEAVX8VEcJ9ht1XDyy/mnLRZZX6vY37AG0xc1+jnp1igLDr Gl98/3pyKrG126wz+iSn1kBmUenDnz12xhbdVR0AdR37jNdZ/KEFJJ1xM1kaMKsTlQr9 gMhg== X-Gm-Message-State: ALyK8tIcqRWfNk1gZl/VEN1IfVdyNmWkrzsvl/u2Ecvdi5p5T+oA40sc6cjK3hFflcS7jA== X-Received: by 10.28.107.85 with SMTP id g82mr4409446wmc.65.1464280583405; Thu, 26 May 2016 09:36:23 -0700 (PDT) Received: from linarch.localdomain (LPuteaux-656-1-278-113.w80-15.abo.wanadoo.fr. [80.15.154.113]) by smtp.googlemail.com with ESMTPSA id lf9sm15133703wjc.44.2016.05.26.09.36.21 (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Thu, 26 May 2016 09:36:22 -0700 (PDT) From: Alvise Rigo To: mttcg@listserver.greensocs.com, alex.bennee@linaro.org Date: Thu, 26 May 2016 18:35:49 +0200 Message-Id: <20160526163549.3276-11-a.rigo@virtualopensystems.com> X-Mailer: git-send-email 2.8.3 In-Reply-To: <20160526163549.3276-1-a.rigo@virtualopensystems.com> References: <20160526163549.3276-1-a.rigo@virtualopensystems.com> X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.2.x-3.x [generic] X-Received-From: 2a00:1450:400c:c09::241 Subject: [Qemu-devel] [RFC 10/10] cpus: Do not sleep if some work item is pending X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.21 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: peter.maydell@linaro.org, rth@twiddle.net, claudio.fontana@huawei.com, qemu-devel@nongnu.org, Alvise Rigo , cota@braap.org, serge.fdrv@gmail.com, pbonzini@redhat.com, jani.kokkonen@huawei.com, tech@virtualopensystems.com, fred.konrad@greensocs.com Errors-To: qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org Sender: "Qemu-devel" If a VCPU returns EXCP_HALTED from the guest code execution and in the mean time receives a work item, it will go to sleep without processing the job. Before sleeping, check if any work has been added. Signed-off-by: Alvise Rigo --- cpus.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/cpus.c b/cpus.c index 7bc96e2..3d19a2e 100644 --- a/cpus.c +++ b/cpus.c @@ -1477,7 +1477,7 @@ static void *qemu_tcg_cpu_thread_fn(void *arg) handle_icount_deadline(); - if (sleep) { + if (sleep && cpu->queued_work_first == NULL) { qemu_cond_wait(cpu->halt_cond, &qemu_global_mutex); }