From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mails.dpdk.org (mails.dpdk.org [217.70.189.124]) by inbox.dpdk.org (Postfix) with ESMTP id D2FDCA0C5D for ; Wed, 8 Sep 2021 19:42:51 +0200 (CEST) Received: from [217.70.189.124] (localhost [127.0.0.1]) by mails.dpdk.org (Postfix) with ESMTP id A76C84003E; Wed, 8 Sep 2021 19:42:51 +0200 (CEST) Received: from mx0a-001b2d01.pphosted.com (mx0a-001b2d01.pphosted.com [148.163.156.1]) by mails.dpdk.org (Postfix) with ESMTP id 3A3D34003E; Wed, 8 Sep 2021 19:42:50 +0200 (CEST) Received: from pps.filterd (m0098393.ppops.net [127.0.0.1]) by mx0a-001b2d01.pphosted.com (8.16.0.43/8.16.0.43) with SMTP id 188HXYVA038481; Wed, 8 Sep 2021 13:42:49 -0400 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=ibm.com; h=subject : to : cc : references : from : message-id : date : in-reply-to : content-type : content-transfer-encoding : mime-version; s=pp1; bh=dZCODy/U8LNydA3lKbKQWT28W9s4hPVGMplxWMMv8bo=; b=egvWYxFH9MycBnh4YtOYDJFzrMlIAUQDgKndSTxspoxc1zyW9uzxTzrCug55pa02NnVd eC32YrYD3g8wNKvbOUwSocOtnND1KXyMnp0joZyT8mcvit9+XQUNDZXpB7OUM9xzYp8r JLdBmVQXCoco+9IfQboAP3X9JEwJJVDcNTblpAQWZjlNQmfoEpZVxBqo0dHkRY5qCYUq FrNPz5bQvffEC77xMGaVJW7GYz1RhNTmlYAHUiMM4pVyC3Mc80gJpRRLRZj80z8vU8OD VV+RZWvTMxYYRlYo03etQPvtafmsIW3Q61c44h2J2yMAjcIn5n0YL/ZYhwgDiOBRhyUU cg== Received: from pps.reinject (localhost [127.0.0.1]) by mx0a-001b2d01.pphosted.com with ESMTP id 3axmeqdgkb-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Wed, 08 Sep 2021 13:42:49 -0400 Received: from m0098393.ppops.net (m0098393.ppops.net [127.0.0.1]) by pps.reinject (8.16.0.43/8.16.0.43) with SMTP id 188HXYH3038422; Wed, 8 Sep 2021 13:42:48 -0400 Received: from ppma02dal.us.ibm.com (a.bd.3ea9.ip4.static.sl-reverse.com [169.62.189.10]) by mx0a-001b2d01.pphosted.com with ESMTP id 3axmeqdgjx-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Wed, 08 Sep 2021 13:42:48 -0400 Received: from pps.filterd (ppma02dal.us.ibm.com [127.0.0.1]) by ppma02dal.us.ibm.com (8.16.1.2/8.16.1.2) with SMTP id 188Hc2GR029042; Wed, 8 Sep 2021 17:42:47 GMT Received: from b01cxnp22033.gho.pok.ibm.com (b01cxnp22033.gho.pok.ibm.com [9.57.198.23]) by ppma02dal.us.ibm.com with ESMTP id 3axcnj7sv6-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Wed, 08 Sep 2021 17:42:47 +0000 Received: from b01ledav001.gho.pok.ibm.com (b01ledav001.gho.pok.ibm.com [9.57.199.106]) by b01cxnp22033.gho.pok.ibm.com (8.14.9/8.14.9/NCO v10.0) with ESMTP id 188HglcF14025200 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Wed, 8 Sep 2021 17:42:47 GMT Received: from b01ledav001.gho.pok.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id E82902805C; Wed, 8 Sep 2021 17:42:46 +0000 (GMT) Received: from b01ledav001.gho.pok.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 90CCD28068; Wed, 8 Sep 2021 17:42:46 +0000 (GMT) Received: from Davids-MBP.randomparity.org (unknown [9.211.70.237]) by b01ledav001.gho.pok.ibm.com (Postfix) with ESMTP; Wed, 8 Sep 2021 17:42:46 +0000 (GMT) To: dev@dpdk.org, david.marchand@redhat.com Cc: stable@dpdk.org References: <20210623161246.49474-1-drc@linux.vnet.ibm.com> <20210902221514.3215704-1-drc@linux.vnet.ibm.com> From: David Christensen Message-ID: Date: Wed, 8 Sep 2021 10:42:45 -0700 User-Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.15; rv:78.0) Gecko/20100101 Thunderbird/78.13.0 In-Reply-To: <20210902221514.3215704-1-drc@linux.vnet.ibm.com> Content-Type: text/plain; charset=utf-8; format=flowed Content-Language: en-US X-TM-AS-GCONF: 00 X-Proofpoint-GUID: Uf_lWhGGOC-GHTttIDy3_gu7-tOaE5CS X-Proofpoint-ORIG-GUID: wJg8P_f5yDdougyDGjcZ4bScVg_TpAHe Content-Transfer-Encoding: 7bit X-Proofpoint-UnRewURL: 0 URL was un-rewritten MIME-Version: 1.0 X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10434:6.0.391, 18.0.790 definitions=2021-09-08_06:2021-09-07, 2021-09-08 signatures=0 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 impostorscore=0 bulkscore=0 phishscore=0 adultscore=0 suspectscore=0 malwarescore=0 mlxlogscore=999 priorityscore=1501 clxscore=1015 lowpriorityscore=0 mlxscore=0 spamscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2109030001 definitions=main-2109080110 Subject: Re: [dpdk-stable] [PATCH] eal/ppc: ignore gcc 10 stringop-overflow warnings X-BeenThere: stable@dpdk.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: patches for DPDK stable branches List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: stable-bounces@dpdk.org Sender: "stable" > Suppress gcc warning "warning: writing 16 bytes into a region of > size 0" for users of the POWER rte_memcpy() function. Existing > rte_memcpy() code takes different code paths based on the actual > size of the move so the warning is already addressed. See also > commit b5b3ea803e47 ("eal/x86: ignore gcc 10 stringop-overflow warnings") > > Signed-off-by: David Christensen > --- > v2: > - update copyright year > - rebase for 21.11-rc0 David M, Any chance of getting this approved in the 21.11 cycle? Patch was originally submitted on 6/23, is only applicable to PPC architecture, and has no functional impact because it only disables warnings. Patchwork reports a performance test regression on x86 systems: http://patches.dpdk.org/project/dpdk/patch/20210902221514.3215704-1-drc@linux.vnet.ibm.com/ But I don't see how that is possible. Applying the patch on a local x86 system results in identical x86 binaries with and without the patch applied. It would appear that the test-to-test performance variations exceed the failure threshold on the CI setup. Dave