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GET /api/1.2/patches/831044/?format=api
{ "id": 831044, "url": "http://patchwork.ozlabs.org/api/1.2/patches/831044/?format=api", "web_url": "http://patchwork.ozlabs.org/project/linuxppc-dev/patch/20171027040833.3644-4-aneesh.kumar@linux.vnet.ibm.com/", "project": { "id": 2, "url": "http://patchwork.ozlabs.org/api/1.2/projects/2/?format=api", "name": "Linux PPC development", "link_name": "linuxppc-dev", "list_id": "linuxppc-dev.lists.ozlabs.org", "list_email": "linuxppc-dev@lists.ozlabs.org", "web_url": "https://github.com/linuxppc/wiki/wiki", "scm_url": "https://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux.git", "webscm_url": "https://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux.git/", "list_archive_url": "https://lore.kernel.org/linuxppc-dev/", "list_archive_url_format": "https://lore.kernel.org/linuxppc-dev/{}/", "commit_url_format": "https://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux.git/commit/?id={}" }, "msgid": "<20171027040833.3644-4-aneesh.kumar@linux.vnet.ibm.com>", "list_archive_url": "https://lore.kernel.org/linuxppc-dev/20171027040833.3644-4-aneesh.kumar@linux.vnet.ibm.com/", "date": "2017-10-27T04:08:20", "name": "[03/16] powerpc/pseries: Update hpte find helper to take hash value", "commit_ref": null, "pull_url": null, "state": "changes-requested", "archived": false, "hash": "62d8c3a2eaa2b555d73b1614d60f61a888340ec6", "submitter": { "id": 664, "url": "http://patchwork.ozlabs.org/api/1.2/people/664/?format=api", "name": "Aneesh Kumar K.V", "email": "aneesh.kumar@linux.vnet.ibm.com" }, "delegate": null, "mbox": "http://patchwork.ozlabs.org/project/linuxppc-dev/patch/20171027040833.3644-4-aneesh.kumar@linux.vnet.ibm.com/mbox/", "series": [ { "id": 10486, "url": "http://patchwork.ozlabs.org/api/1.2/series/10486/?format=api", "web_url": "http://patchwork.ozlabs.org/project/linuxppc-dev/list/?series=10486", "date": "2017-10-27T04:08:17", "name": "Remove hash page table slot tracking from linux PTE", "version": 1, "mbox": "http://patchwork.ozlabs.org/series/10486/mbox/" } ], "comments": "http://patchwork.ozlabs.org/api/patches/831044/comments/", "check": "pending", "checks": "http://patchwork.ozlabs.org/api/patches/831044/checks/", "tags": {}, "related": [], "headers": { "Return-Path": "<linuxppc-dev-bounces+patchwork-incoming=ozlabs.org@lists.ozlabs.org>", "X-Original-To": [ "patchwork-incoming@ozlabs.org", "linuxppc-dev@lists.ozlabs.org" ], "Delivered-To": [ "patchwork-incoming@ozlabs.org", "linuxppc-dev@lists.ozlabs.org" ], "Received": [ "from lists.ozlabs.org (lists.ozlabs.org [103.22.144.68])\n\t(using TLSv1.2 with cipher ADH-AES256-GCM-SHA384 (256/256 bits))\n\t(No client certificate requested)\n\tby ozlabs.org (Postfix) with ESMTPS id 3yNVqP3RBDz9t0F\n\tfor <patchwork-incoming@ozlabs.org>;\n\tFri, 27 Oct 2017 15:13:37 +1100 (AEDT)", "from lists.ozlabs.org (lists.ozlabs.org [IPv6:2401:3900:2:1::3])\n\tby lists.ozlabs.org (Postfix) with ESMTP id 3yNVqP2YG0zDrd6\n\tfor <patchwork-incoming@ozlabs.org>;\n\tFri, 27 Oct 2017 15:13:37 +1100 (AEDT)", "from mx0a-001b2d01.pphosted.com (mx0a-001b2d01.pphosted.com\n\t[148.163.156.1])\n\t(using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256\n\tbits)) (No client certificate requested)\n\tby lists.ozlabs.org (Postfix) with ESMTPS id 3yNVkD4XNCzDrbn\n\tfor <linuxppc-dev@lists.ozlabs.org>;\n\tFri, 27 Oct 2017 15:09:08 +1100 (AEDT)", "from pps.filterd (m0098399.ppops.net [127.0.0.1])\n\tby mx0a-001b2d01.pphosted.com (8.16.0.21/8.16.0.21) with SMTP id\n\tv9R492KZ091623\n\tfor <linuxppc-dev@lists.ozlabs.org>; Fri, 27 Oct 2017 00:09:06 -0400", "from e36.co.us.ibm.com (e36.co.us.ibm.com [32.97.110.154])\n\tby mx0a-001b2d01.pphosted.com with ESMTP id 2duvcejpmp-1\n\t(version=TLSv1.2 cipher=AES256-SHA bits=256 verify=NOT)\n\tfor <linuxppc-dev@lists.ozlabs.org>; Fri, 27 Oct 2017 00:09:05 -0400", "from localhost\n\tby e36.co.us.ibm.com with IBM ESMTP SMTP Gateway: Authorized Use\n\tOnly! Violators will be prosecuted\n\tfor <linuxppc-dev@lists.ozlabs.org> from\n\t<aneesh.kumar@linux.vnet.ibm.com>; Thu, 26 Oct 2017 22:09:05 -0600", "from b03cxnp07029.gho.boulder.ibm.com (9.17.130.16)\n\tby e36.co.us.ibm.com (192.168.1.136) with IBM ESMTP SMTP Gateway:\n\tAuthorized Use Only! Violators will be prosecuted; \n\tThu, 26 Oct 2017 22:09:02 -0600", "from b03ledav001.gho.boulder.ibm.com\n\t(b03ledav001.gho.boulder.ibm.com [9.17.130.232])\n\tby b03cxnp07029.gho.boulder.ibm.com (8.14.9/8.14.9/NCO v10.0) with\n\tESMTP id v9R492iF7930266; Thu, 26 Oct 2017 21:09:02 -0700", "from b03ledav001.gho.boulder.ibm.com (unknown [127.0.0.1])\n\tby IMSVA (Postfix) with ESMTP id 2A8846E176;\n\tThu, 26 Oct 2017 22:09:02 -0600 (MDT)", "from skywalker.ibmmodules.com (unknown [9.85.199.61])\n\tby b03ledav001.gho.boulder.ibm.com (Postfix) with ESMTP id 5B9516E121;\n\tThu, 26 Oct 2017 22:08:57 -0600 (MDT)" ], "Authentication-Results": "ozlabs.org;\n\tspf=none (mailfrom) smtp.mailfrom=linux.vnet.ibm.com\n\t(client-ip=148.163.156.1; helo=mx0a-001b2d01.pphosted.com;\n\tenvelope-from=aneesh.kumar@linux.vnet.ibm.com; receiver=<UNKNOWN>)", "From": "\"Aneesh Kumar K.V\" <aneesh.kumar@linux.vnet.ibm.com>", "To": "benh@kernel.crashing.org, paulus@samba.org, mpe@ellerman.id.au", "Subject": "[PATCH 03/16] powerpc/pseries: Update hpte find helper to take hash\n\tvalue", "Date": "Fri, 27 Oct 2017 09:38:20 +0530", "X-Mailer": "git-send-email 2.13.6", "In-Reply-To": "<20171027040833.3644-1-aneesh.kumar@linux.vnet.ibm.com>", "References": "<20171027040833.3644-1-aneesh.kumar@linux.vnet.ibm.com>", "X-TM-AS-GCONF": "00", "x-cbid": "17102704-0020-0000-0000-00000CE87138", "X-IBM-SpamModules-Scores": "", "X-IBM-SpamModules-Versions": "BY=3.00007958; HX=3.00000241; KW=3.00000007;\n\tPH=3.00000004; SC=3.00000239; SDB=6.00937034; UDB=6.00472245;\n\tIPR=6.00717297; \n\tBA=6.00005660; NDR=6.00000001; ZLA=6.00000005; ZF=6.00000009;\n\tZB=6.00000000; \n\tZP=6.00000000; ZH=6.00000000; ZU=6.00000002; MB=3.00017735;\n\tXFM=3.00000015; UTC=2017-10-27 04:09:04", "X-IBM-AV-DETECTION": "SAVI=unused REMOTE=unused XFE=unused", "x-cbparentid": "17102704-0021-0000-0000-00005EAC0D01", "Message-Id": "<20171027040833.3644-4-aneesh.kumar@linux.vnet.ibm.com>", "X-Proofpoint-Virus-Version": "vendor=fsecure engine=2.50.10432:, ,\n\tdefinitions=2017-10-27_02:, , signatures=0", "X-Proofpoint-Spam-Details": "rule=outbound_notspam policy=outbound score=0\n\tpriorityscore=1501\n\tmalwarescore=0 suspectscore=0 phishscore=0 bulkscore=0 spamscore=0\n\tclxscore=1015 lowpriorityscore=0 impostorscore=0 adultscore=0\n\tclassifier=spam adjust=0 reason=mlx scancount=1\n\tengine=8.0.1-1707230000\n\tdefinitions=main-1710270053", "X-BeenThere": "linuxppc-dev@lists.ozlabs.org", "X-Mailman-Version": "2.1.24", "Precedence": "list", "List-Id": "Linux on PowerPC Developers Mail List\n\t<linuxppc-dev.lists.ozlabs.org>", "List-Unsubscribe": "<https://lists.ozlabs.org/options/linuxppc-dev>,\n\t<mailto:linuxppc-dev-request@lists.ozlabs.org?subject=unsubscribe>", "List-Archive": "<http://lists.ozlabs.org/pipermail/linuxppc-dev/>", "List-Post": "<mailto:linuxppc-dev@lists.ozlabs.org>", "List-Help": "<mailto:linuxppc-dev-request@lists.ozlabs.org?subject=help>", "List-Subscribe": "<https://lists.ozlabs.org/listinfo/linuxppc-dev>,\n\t<mailto:linuxppc-dev-request@lists.ozlabs.org?subject=subscribe>", "Cc": "linuxppc-dev@lists.ozlabs.org,\n\t\"Aneesh Kumar K.V\" <aneesh.kumar@linux.vnet.ibm.com>", "Errors-To": "linuxppc-dev-bounces+patchwork-incoming=ozlabs.org@lists.ozlabs.org", "Sender": "\"Linuxppc-dev\"\n\t<linuxppc-dev-bounces+patchwork-incoming=ozlabs.org@lists.ozlabs.org>" }, "content": "The helper now also does secondary hash search so that we can use this in other\nfunctions.\n\nSigned-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>\n---\n arch/powerpc/platforms/pseries/lpar.c | 28 +++++++++++++++++-----------\n 1 file changed, 17 insertions(+), 11 deletions(-)", "diff": "diff --git a/arch/powerpc/platforms/pseries/lpar.c b/arch/powerpc/platforms/pseries/lpar.c\nindex 495ba4e7336d..edab68d9f9f3 100644\n--- a/arch/powerpc/platforms/pseries/lpar.c\n+++ b/arch/powerpc/platforms/pseries/lpar.c\n@@ -328,15 +328,21 @@ static long pSeries_lpar_hpte_updatepp(unsigned long slot,\n \treturn 0;\n }\n \n-static long __pSeries_lpar_hpte_find(unsigned long want_v, unsigned long hpte_group)\n+static long __pSeries_lpar_hpte_find(unsigned long hash, unsigned long want_v)\n {\n \tlong lpar_rc;\n \tunsigned long i, j;\n+\tunsigned long hpte_group;\n+\tbool secondary_search = false;\n \tstruct {\n \t\tunsigned long pteh;\n \t\tunsigned long ptel;\n \t} ptes[4];\n \n+\t/* first check primary */\n+\thpte_group = (hash & htab_hash_mask) * HPTES_PER_GROUP;\n+\n+search_again:\n \tfor (i = 0; i < HPTES_PER_GROUP; i += 4, hpte_group += 4) {\n \n \t\tlpar_rc = plpar_pte_read_4(0, hpte_group, (void *)ptes);\n@@ -346,31 +352,31 @@ static long __pSeries_lpar_hpte_find(unsigned long want_v, unsigned long hpte_gr\n \t\tfor (j = 0; j < 4; j++) {\n \t\t\tif (HPTE_V_COMPARE(ptes[j].pteh, want_v) &&\n \t\t\t (ptes[j].pteh & HPTE_V_VALID))\n-\t\t\t\treturn i + j;\n+\t\t\t\treturn hpte_group + j;\n \t\t}\n \t}\n-\n+\tif (!secondary_search) {\n+\t\thpte_group = (~hash & htab_hash_mask) * HPTES_PER_GROUP;\n+\t\tsecondary_search = true;\n+\t\tgoto search_again;\n+\t}\n \treturn -1;\n }\n \n static long pSeries_lpar_hpte_find(unsigned long vpn, int psize, int ssize)\n {\n \tlong slot;\n-\tunsigned long hash;\n-\tunsigned long want_v;\n-\tunsigned long hpte_group;\n+\tunsigned long hash, want_v;\n \n \thash = hpt_hash(vpn, mmu_psize_defs[psize].shift, ssize);\n \twant_v = hpte_encode_avpn(vpn, psize, ssize);\n-\n-\t/* Bolted entries are always in the primary group */\n-\thpte_group = (hash & htab_hash_mask) * HPTES_PER_GROUP;\n-\tslot = __pSeries_lpar_hpte_find(want_v, hpte_group);\n+\tslot = __pSeries_lpar_hpte_find(hash, want_v);\n \tif (slot < 0)\n \t\treturn -1;\n-\treturn hpte_group + slot;\n+\treturn slot;\n }\n \n+\n static void pSeries_lpar_hpte_updateboltedpp(unsigned long newpp,\n \t\t\t\t\t unsigned long ea,\n \t\t\t\t\t int psize, int ssize)\n", "prefixes": [ "03/16" ] }