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Fri, 25 Nov 2022 17:32:05 +0000 (GMT) Received: from d06av25.portsmouth.uk.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 840E011C04A; Fri, 25 Nov 2022 17:32:05 +0000 (GMT) Received: from localhost.localdomain (unknown [9.145.29.108]) by d06av25.portsmouth.uk.ibm.com (Postfix) with ESMTP; Fri, 25 Nov 2022 17:32:05 +0000 (GMT) From: Laurent Dufour To: linuxppc-dev@lists.ozlabs.org, mpe@ellerman.id.au, christophe.leroy@csgroup.eu, npiggin@gmail.com Subject: [PATCH] pseries/mobility: reset the RCU watchdogs after a LPM Date: Fri, 25 Nov 2022 18:32:04 +0100 Message-Id: <20221125173204.15329-1-ldufour@linux.ibm.com> X-Mailer: git-send-email 2.38.1 MIME-Version: 1.0 X-TM-AS-GCONF: 00 X-Proofpoint-GUID: QXfFMnDoU-HeCj_YbipiqHy52RmVp2VB X-Proofpoint-ORIG-GUID: ip9skIX22mkkl8nvAkE4uU__T88bnBj0 X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.219,Aquarius:18.0.895,Hydra:6.0.545,FMLib:17.11.122.1 definitions=2022-11-25_08,2022-11-25_01,2022-06-22_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 priorityscore=1501 spamscore=0 phishscore=0 bulkscore=0 malwarescore=0 suspectscore=0 adultscore=0 clxscore=1011 impostorscore=0 mlxlogscore=912 lowpriorityscore=0 mlxscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2210170000 definitions=main-2211250136 X-BeenThere: linuxppc-dev@lists.ozlabs.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Linux on PowerPC Developers Mail List List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: linuxppc-dev-bounces+incoming=patchwork.ozlabs.org@lists.ozlabs.org Sender: "Linuxppc-dev" The RCU watchdog timer should be reset when restarting the CPU after a Live Partition Mobility operation. Signed-off-by: Laurent Dufour Acked-by: Nicholas Piggin --- arch/powerpc/platforms/pseries/mobility.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) diff --git a/arch/powerpc/platforms/pseries/mobility.c b/arch/powerpc/platforms/pseries/mobility.c index 634fac5db3f9..9e10f38dd9ad 100644 --- a/arch/powerpc/platforms/pseries/mobility.c +++ b/arch/powerpc/platforms/pseries/mobility.c @@ -636,8 +636,10 @@ static int do_join(void *arg) } /* * Execution may have been suspended for several seconds, so - * reset the watchdog. + * reset the watchdogs. */ + rcu_cpu_stall_reset(); + /* touch_nmi_watchdog() also touch the soft lockup watchdog */ touch_nmi_watchdog(); return ret; }