From patchwork Thu May 3 13:21:26 2018 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Vasant Hegde X-Patchwork-Id: 908043 Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@bilbo.ozlabs.org Received: from lists.ozlabs.org (lists.ozlabs.org [IPv6:2401:3900:2:1::3]) (using TLSv1.2 with cipher ADH-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by ozlabs.org (Postfix) with ESMTPS id 40cG5W5KThz9s35 for ; Thu, 3 May 2018 23:22:07 +1000 (AEST) Authentication-Results: ozlabs.org; dmarc=none (p=none dis=none) header.from=linux.vnet.ibm.com Received: from lists.ozlabs.org (lists.ozlabs.org [IPv6:2401:3900:2:1::3]) by lists.ozlabs.org (Postfix) with ESMTP id 40cG5W2bjmzF2W8 for ; Thu, 3 May 2018 23:22:07 +1000 (AEST) Authentication-Results: lists.ozlabs.org; dmarc=none (p=none dis=none) header.from=linux.vnet.ibm.com X-Original-To: skiboot@lists.ozlabs.org Delivered-To: skiboot@lists.ozlabs.org Authentication-Results: lists.ozlabs.org; spf=none (mailfrom) smtp.mailfrom=linux.vnet.ibm.com (client-ip=148.163.156.1; helo=mx0a-001b2d01.pphosted.com; envelope-from=hegdevasant@linux.vnet.ibm.com; receiver=) Authentication-Results: lists.ozlabs.org; dmarc=none (p=none dis=none) header.from=linux.vnet.ibm.com Received: from mx0a-001b2d01.pphosted.com (mx0a-001b2d01.pphosted.com [148.163.156.1]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by lists.ozlabs.org (Postfix) with ESMTPS id 40cG58697PzF2Rv for ; Thu, 3 May 2018 23:21:48 +1000 (AEST) Received: from pps.filterd (m0098394.ppops.net [127.0.0.1]) by mx0a-001b2d01.pphosted.com (8.16.0.22/8.16.0.22) with SMTP id w43DKs8J058231 for ; Thu, 3 May 2018 09:21:46 -0400 Received: from e06smtp11.uk.ibm.com (e06smtp11.uk.ibm.com [195.75.94.107]) by mx0a-001b2d01.pphosted.com with ESMTP id 2hr344gdmy-1 (version=TLSv1.2 cipher=AES256-GCM-SHA384 bits=256 verify=NOT) for ; Thu, 03 May 2018 09:21:45 -0400 Received: from localhost by e06smtp11.uk.ibm.com with IBM ESMTP SMTP Gateway: Authorized Use Only! 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Violators will be prosecuted; Thu, 3 May 2018 14:21:42 +0100 Received: from d06av21.portsmouth.uk.ibm.com (d06av21.portsmouth.uk.ibm.com [9.149.105.232]) by b06cxnps4076.portsmouth.uk.ibm.com (8.14.9/8.14.9/NCO v10.0) with ESMTP id w43DLfts5505370; Thu, 3 May 2018 13:21:41 GMT Received: from d06av21.portsmouth.uk.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 1C6375204B; Thu, 3 May 2018 13:12:08 +0100 (BST) Received: from hegdevasant.in.ibm.com (unknown [9.109.198.192]) by d06av21.portsmouth.uk.ibm.com (Postfix) with ESMTP id 0E81052045; Thu, 3 May 2018 13:12:06 +0100 (BST) From: Vasant Hegde To: skiboot@lists.ozlabs.org Date: Thu, 3 May 2018 18:51:26 +0530 X-Mailer: git-send-email 2.14.3 In-Reply-To: <20180503132126.6830-1-hegdevasant@linux.vnet.ibm.com> References: <20180503132126.6830-1-hegdevasant@linux.vnet.ibm.com> X-TM-AS-GCONF: 00 x-cbid: 18050313-0040-0000-0000-0000045491C9 X-IBM-AV-DETECTION: SAVI=unused REMOTE=unused XFE=unused x-cbparentid: 18050313-0041-0000-0000-000020F8B897 Message-Id: <20180503132126.6830-2-hegdevasant@linux.vnet.ibm.com> X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10434:, , definitions=2018-05-03_07:, , signatures=0 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 priorityscore=1501 malwarescore=0 suspectscore=1 phishscore=0 bulkscore=0 spamscore=0 clxscore=1011 lowpriorityscore=0 impostorscore=0 adultscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.0.1-1709140000 definitions=main-1805030119 Subject: [Skiboot] [PATCH 2/2] timer: Reschedule timer if OPAL receives early timer interrupt X-BeenThere: skiboot@lists.ozlabs.org X-Mailman-Version: 2.1.26 Precedence: list List-Id: Mailing list for skiboot development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , MIME-Version: 1.0 Errors-To: skiboot-bounces+incoming=patchwork.ozlabs.org@lists.ozlabs.org Sender: "Skiboot" If we receive timer interrupt before timer expiry, we are not rescheduling timer again. Lets fix this by rescheduling timer. Suggested-by: Benjamin Herrenschmidt Signed-off-by: Vasant Hegde --- core/timer.c | 9 +++++++-- 1 file changed, 7 insertions(+), 2 deletions(-) diff --git a/core/timer.c b/core/timer.c index 1c5395178..5890b203c 100644 --- a/core/timer.c +++ b/core/timer.c @@ -203,10 +203,15 @@ static void __check_timers(uint64_t now) for (;;) { t = list_top(&timer_list, struct timer, link); - /* Top of list not expired ? that's it ... */ - if (!t || t->target > now) + if (!t) break; + /* Top of list not expired ? re-schedule timer */ + if (t->target > now) { + update_timer_expiry(t->target); + break; + } + /* Top of list still running, we have to delay handling * it. For now just skip until the next poll, when we have * SLW interrupts, we'll probably want to trip another one