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Tue, 9 Jun 2020 09:04:02 +0000 (GMT) Received: from b06wcsmtp001.portsmouth.uk.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 6CFF6A406D; Tue, 9 Jun 2020 09:04:00 +0000 (GMT) Received: from JAVRIS.in.ibm.com (unknown [9.199.50.138]) by b06wcsmtp001.portsmouth.uk.ibm.com (Postfix) with ESMTPS; Tue, 9 Jun 2020 09:04:00 +0000 (GMT) Subject: Re: [PATCH v3] selftests: powerpc: Fix CPU affinity for child process To: Harish References: <20200609081423.529664-1-harish@linux.ibm.com> From: Kamalesh Babulal Message-ID: <94ca8f60-3e1a-73d3-fc06-ece5981dfd59@linux.vnet.ibm.com> Date: Tue, 9 Jun 2020 14:33:58 +0530 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:68.0) Gecko/20100101 Thunderbird/68.8.0 MIME-Version: 1.0 In-Reply-To: <20200609081423.529664-1-harish@linux.ibm.com> Content-Type: text/plain; charset=utf-8 Content-Language: en-US Content-Transfer-Encoding: 7bit X-TM-AS-GCONF: 00 X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10434:6.0.216, 18.0.687 definitions=2020-06-09_03:2020-06-08, 2020-06-09 signatures=0 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 lowpriorityscore=0 mlxscore=0 impostorscore=0 clxscore=1015 adultscore=0 spamscore=0 phishscore=0 malwarescore=0 mlxlogscore=999 cotscore=-2147483648 bulkscore=0 suspectscore=0 priorityscore=1501 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2004280000 definitions=main-2006090065 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: , Cc: srikar@linux.vnet.ibm.com, shiganta@in.ibm.com, sathnaga@linux.vnet.ibm.com, sandipan@linux.ibm.com, linuxppc-dev@lists.ozlabs.org Errors-To: linuxppc-dev-bounces+linuxppc-dev=archiver.kernel.org@lists.ozlabs.org Sender: "Linuxppc-dev" On 6/9/20 1:44 PM, Harish wrote: > On systems with large number of cpus, test fails trying to set > affinity by calling sched_setaffinity() with smaller size for > affinity mask. This patch fixes it by making sure that the size of > allocated affinity mask is dependent on the number of CPUs as > reported by get_nprocs(). > > Fixes: 00b7ec5c9cf3 ("selftests/powerpc: Import Anton's context_switch2 benchmark") > Reported-by: Shirisha Ganta > Signed-off-by: Sandipan Das > Signed-off-by: Harish LGTM, Reviewed-by: Kamalesh Babulal -- Kamalesh