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Tue, 14 Jul 2020 04:36:55 +0000 (GMT) Received: from b06wcsmtp001.portsmouth.uk.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 3609FA4054; Tue, 14 Jul 2020 04:36:53 +0000 (GMT) Received: from srikart450.in.ibm.com (unknown [9.85.70.163]) by b06wcsmtp001.portsmouth.uk.ibm.com (Postfix) with ESMTP; Tue, 14 Jul 2020 04:36:53 +0000 (GMT) From: Srikar Dronamraju To: Michael Ellerman Subject: [PATCH 04/11] powerpc/smp: Enable small core scheduling sooner Date: Tue, 14 Jul 2020 10:06:17 +0530 Message-Id: <20200714043624.5648-5-srikar@linux.vnet.ibm.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20200714043624.5648-1-srikar@linux.vnet.ibm.com> References: <20200714043624.5648-1-srikar@linux.vnet.ibm.com> X-TM-AS-GCONF: 00 X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10434:6.0.235, 18.0.687 definitions=2020-07-13_17:2020-07-13, 2020-07-13 signatures=0 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 lowpriorityscore=0 adultscore=0 impostorscore=0 priorityscore=1501 suspectscore=0 clxscore=1015 spamscore=0 malwarescore=0 phishscore=0 mlxlogscore=999 mlxscore=0 bulkscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2006250000 definitions=main-2007140034 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: Nathan Lynch , Gautham R Shenoy , Oliver OHalloran , Michael Neuling , Srikar Dronamraju , Michael Ellerman , Anton Blanchard , linuxppc-dev , Nick Piggin Errors-To: linuxppc-dev-bounces+linuxppc-dev=archiver.kernel.org@lists.ozlabs.org Sender: "Linuxppc-dev" Enable small core scheduling as soon as we detect that we are in a system that supports thread group. Doing so would avoid a redundant check. Cc: linuxppc-dev Cc: Michael Ellerman Cc: Nick Piggin Cc: Oliver OHalloran Cc: Nathan Lynch Cc: Michael Neuling Cc: Anton Blanchard Cc: Gautham R Shenoy Cc: Vaidyanathan Srinivasan Signed-off-by: Srikar Dronamraju --- arch/powerpc/kernel/smp.c | 12 ++++++------ 1 file changed, 6 insertions(+), 6 deletions(-) diff --git a/arch/powerpc/kernel/smp.c b/arch/powerpc/kernel/smp.c index 24529f6134aa..7d430fc536cc 100644 --- a/arch/powerpc/kernel/smp.c +++ b/arch/powerpc/kernel/smp.c @@ -892,6 +892,12 @@ static int init_big_cores(void) } has_big_cores = true; + +#ifdef CONFIG_SCHED_SMT + pr_info("Big cores detected. Using small core scheduling\n"); + powerpc_topology[0].mask = smallcore_smt_mask; +#endif + return 0; } @@ -1383,12 +1389,6 @@ void __init smp_cpus_done(unsigned int max_cpus) dump_numa_cpu_topology(); -#ifdef CONFIG_SCHED_SMT - if (has_big_cores) { - pr_info("Big cores detected but using small core scheduling\n"); - powerpc_topology[0].mask = smallcore_smt_mask; - } -#endif set_sched_topology(powerpc_topology); } -- 2.17.1