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Violators will be prosecuted; Thu, 26 Apr 2018 10:25:26 +0100 Received: from d06av23.portsmouth.uk.ibm.com (d06av23.portsmouth.uk.ibm.com [9.149.105.59]) by b06cxnps3074.portsmouth.uk.ibm.com (8.14.9/8.14.9/NCO v10.0) with ESMTP id w3Q9PPuW131490; Thu, 26 Apr 2018 09:25:25 GMT Received: from d06av23.portsmouth.uk.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id F3FFCA404D; Thu, 26 Apr 2018 10:17:22 +0100 (BST) Received: from d06av23.portsmouth.uk.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id A0D18A4053; Thu, 26 Apr 2018 10:17:22 +0100 (BST) Received: from ozlabs.au.ibm.com (unknown [9.192.253.14]) by d06av23.portsmouth.uk.ibm.com (Postfix) with ESMTP; Thu, 26 Apr 2018 10:17:22 +0100 (BST) Received: from [10.61.2.125] (haven.au.ibm.com [9.192.254.114]) (using TLSv1.2 with cipher DHE-RSA-AES128-SHA (128/128 bits)) (No client certificate requested) by ozlabs.au.ibm.com (Postfix) with ESMTPSA id D9B4AA00D7; Thu, 26 Apr 2018 19:25:22 +1000 (AEST) Subject: Re: [PATCH v2 3/7] powerpc: use task_pid_nr() for TID allocation To: Sukadev Bhattiprolu Cc: "Alastair D'Silva" , linuxppc-dev@lists.ozlabs.org, linux-kernel@vger.kernel.org, linux-doc@vger.kernel.org, mikey@neuling.org, vaibhav@linux.vnet.ibm.com, aneesh.kumar@linux.vnet.ibm.com, malat@debian.org, felix@linux.vnet.ibm.com, pombredanne@nexb.com, sukadev@linux.vnet.ibm.com, npiggin@gmail.com, gregkh@linuxfoundation.org, arnd@arndb.de, fbarrat@linux.vnet.ibm.com, corbet@lwn.net, "Alastair D'Silva" , Christophe Lombard References: <20180417020950.21446-1-alastair@au1.ibm.com> <20180418010810.30937-1-alastair@au1.ibm.com> <20180418010810.30937-4-alastair@au1.ibm.com> <20180424211231.GA25392@us.ibm.com> From: Andrew Donnellan Date: Thu, 26 Apr 2018 19:25:22 +1000 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:52.0) Gecko/20100101 Thunderbird/52.7.0 MIME-Version: 1.0 In-Reply-To: <20180424211231.GA25392@us.ibm.com> Content-Type: text/plain; charset=utf-8; format=flowed Content-Language: en-AU Content-Transfer-Encoding: 7bit X-TM-AS-GCONF: 00 x-cbid: 18042609-0012-0000-0000-000005CF43B3 X-IBM-AV-DETECTION: SAVI=unused REMOTE=unused XFE=unused x-cbparentid: 18042609-0013-0000-0000-0000194C4850 Message-Id: X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10434:,, definitions=2018-04-26_04:,, signatures=0 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 priorityscore=1501 malwarescore=0 suspectscore=0 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-1804260091 Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On 25/04/18 07:12, Sukadev Bhattiprolu wrote: > Yes. Like with PIDR, was trying to assign TIDR initially to all threads. > But since only a subset of threads need/use TIDR, we can assign the > value later (when set_thread_tidr() is called). So we should be able to > use task_pid_nr() then. OK. Alastair has also confirmed with me that truncating the pid to a u16 should be safe, so therefore: Reviewed-by: Andrew Donnellan -- Andrew Donnellan OzLabs, ADL Canberra andrew.donnellan@au1.ibm.com IBM Australia Limited