Received-SPF: pass (google.com: domain of linux-nfs-owner@vger.kernel.org designates 2620:137:e000::1:18 as permitted sender) client-ip=2620:137:e000::1:18;
From:   Trond Myklebust <trondmy@hammerspace.com>
To:     "bcodding@redhat.com" <bcodding@redhat.com>
CC:     "linux-nfs@vger.kernel.org" <linux-nfs@vger.kernel.org>
Subject: Re: [PATCH v6 05/13] NFS: Improve algorithm for falling back to
 uncached readdir
Thread-Topic: [PATCH v6 05/13] NFS: Improve algorithm for falling back to
 uncached readdir
Thread-Index: AQHYJz5fkvZWF2nTREGh+HaYGEm7A6yeNkSAgAA2EQA=
Date:   Mon, 21 Feb 2022 19:58:37 +0000
Message-ID: <e01f0373409aaf09dbaf59f3aa7deb421af68980.camel@hammerspace.com>
References: <20220221160851.15508-1-trondmy@kernel.org>
         <20220221160851.15508-2-trondmy@kernel.org>
         <20220221160851.15508-3-trondmy@kernel.org>
         <20220221160851.15508-4-trondmy@kernel.org>
         <20220221160851.15508-5-trondmy@kernel.org>
         <20220221160851.15508-6-trondmy@kernel.org>
         <BCE9A6AB-EAA5-477E-BFE7-529AEC443E6A@redhat.com>
In-Reply-To: <BCE9A6AB-EAA5-477E-BFE7-529AEC443E6A@redhat.com>
Accept-Language: en-US, en-GB
Content-Language: en-US
x-ms-exchange-antispam-messagedata-chunkcount: 1
x-ms-exchange-antispam-messagedata-0: =?utf-8?B?N21qdnd0NWRwZlJoUTFNY1g2NC9aR1ZHVERCM1Z6ZDY3L1haVGg1ZjVCVnBx?=
 =?utf-8?B?Tkcwd1JRaFo2YXFoMXphQ1RkbnlLSVlLVC9SMzhJTmVHYSszU0ZXMTh4WjUw?=
 =?utf-8?B?WUU2L245QzZOWVJXN2FnU1JyUzFzQTNlbTRhVnMvejNmVkJ4bGZEaHF2RTda?=
 =?utf-8?B?YWt0QWQ2VGlFRkZhRWhCWk9vc2pjOGJQNWFaTVRucCs4SUd2OCtLbGo0OWRT?=
 =?utf-8?B?L3dMU3REb1Z4c1Qvd2NLNmhKMXFhMUtNcnArOEtEa1V2Q3NBTW1xRzcvL2hy?=
 =?utf-8?B?VUQxUkF2QjQzdG12QUVUcERGWGQ0c0VyMWY0akRKbTRyd1hLWFBSZ1BSakR1?=
 =?utf-8?B?UThyZXIxeDE0V2RtNzlIZzdsUm9MVHFwdkNrRlFRVFBEZkJFSlJDTm1uRlFv?=
 =?utf-8?B?aHJyM2tXa3JJNVZuVm53N21oTzVnZHZwOHZSYTA3RlA4cmI2VzZsWlc3MzZR?=
 =?utf-8?B?UHNCREg1SUt2WW5HV1l5M25GSHE2TTI2QU5FWEFNZ3o5cEhiNGVLUnZFbFA0?=
 =?utf-8?B?UmRxcW5ZR3YxY0E5ZlBLdjFwRjMzZTI2K0YxeSs5MmpTK1ZXL213WmI4R0Yw?=
 =?utf-8?B?Z0VUU21CcXErQmNWY0dKRHlVZ0Y0TldTejhzYXRraWk2WjJXcThCeEhqd1JC?=
 =?utf-8?B?dHJ3eE1hVkhlY2xDWlN0dnFxL1pVQ05YUG9Pek5KRHlvU2JFcGNaNEVtRDZq?=
 =?utf-8?B?U2l4VDJDU1lra3JWNjRhNlUyQm5TSG9jU0lQWk9Ea2tNbld4VkViYS85eUlp?=
 =?utf-8?B?RkY1S3lKdklUVEUxSnJISnN5anBDVnZxRFB4clVxRTVQYndFeXRTR0J5cnQv?=
 =?utf-8?B?VEtSNHB2ajduaTJtVEVBNHdQcGxoaE91OWpXV2hld2dzWUJKYk9xZEZoMEpY?=
 =?utf-8?B?eWY5b0E1SktsV1VYRGR4ODJmdWo2U0tUa1J0QmI2T2lmTm5zY0c5ZmxjKzFv?=
 =?utf-8?B?ZmpCUjFEN0hHVTFsSkh0RmtGZzFnbndnRHE2STVIVHRjK0JkZU12MFoxR1hy?=
 =?utf-8?B?eXF5RGhWWnNvcnZaTUg0V2tseDBjKzFleWxLT0xKdmt6cUpaS2JTeFJHeDVs?=
 =?utf-8?B?R1FhZmtEdVFtSGtMVm5XK0FMWmpjNEVWYkFxaUVtdmI4bFhZakNsR0pxWHY4?=
 =?utf-8?B?bFNpYm5xSG5IMktDNFlNcWJhL1pnMENKcnZOdWdmQmxYelZFUlNVUWlXcUxV?=
 =?utf-8?B?d1RvUUt1bnlwaWl3TGN6T1dRRkF1UXNmRXA1dEtFYm1vNEF2SkFSK1FsS2lV?=
 =?utf-8?B?ZnRKSVN1ckdIN0NEUHpjeUhTQTZIYXFWdkxDQSs5bjZtaStYTS8vQVNOVnBM?=
 =?utf-8?B?bTd5R2szdGNXY1QzQnhtQnoxSTBKUkNKMzg3OHhzeTdWa3VRK3hjMUNjbTl2?=
 =?utf-8?B?bWt2TGJVcXNHTkhyUUdrOXc2S0Z3eWo0VTk2YXJWK0FkbGVtZHJ6ZHJhcE9H?=
 =?utf-8?B?QisxQmxHam45NVNNd3JNUzlhVmdsZXF6UkwvYVlJWk94RXhsQ3F5bTNGVlFl?=
 =?utf-8?B?U3pmUnk2S1k4WStXaGNLTlpVMUE5T093ajFZMklqVzlibHpoYmpIRUxkdm1a?=
 =?utf-8?B?UjVySGZFRE0walBXclFwYmRLK1NBeVIraEhlSHozMzB0TUQyY2xxRmZIMVZQ?=
 =?utf-8?B?UE5hV3c0WlB1T0s4cmROVStOSytIdGxEcVo4MEdtdFhCdThycmR0YWRUMWov?=
 =?utf-8?B?MGVqZ2tWalIyVDJCTjJ4TExvbVJncENPblp6NWhUeUxDQUpleTgxYWs4d3FU?=
 =?utf-8?B?T1Y3NW5rSFplZ05CUEtZZWc0TGgvRmxPR1hDR3dxMHNrcnR0S0p6YlVkNUVZ?=
 =?utf-8?B?MjlwVStZRXVZV3YwU0JJa2NhN0F5bU5HRGhnMkhaeTcyQ3FhOXJURlpPOTgw?=
 =?utf-8?B?cmVGbUNreTU3bjZRMmZYRm8wWS82U0JYNTY0WEpuTHRBL2pxcVY0NlZKN3hu?=
 =?utf-8?B?VWM3ZzA3bmQwVzBTa3NSWkJlQm5XWGN1NFQrL214T1c1eEdZTEFLL2Rzay9U?=
 =?utf-8?B?dXAyOENkMXdoaXppaC9QUWpTTXo3aXQ5TzFqZUNIQUw0NlZVdHNySitZRm1h?=
 =?utf-8?B?V1k3R3dUZzhGSlpya2pPRU1rTlB3YlBHbTVscU50V25Uczk4R0FpeTJ6eDI1?=
 =?utf-8?B?eWRpd3BHb0dBa1VzRGNuUHVGZFdoc24zQ0lIOGFLbXU1OTFDQmFJVTROMjNS?=
 =?utf-8?Q?FR/PwMU8gcMMfTImP8pycHI=3D?=
Content-Type: text/plain; charset="utf-8"
Content-ID: <0043934675B1354C932074C81DC5BC42@namprd13.prod.outlook.com>
Content-Transfer-Encoding: base64
MIME-Version: 1.0
X-OriginatorOrg: hammerspace.com
X-MS-Exchange-CrossTenant-AuthAs: Internal
X-MS-Exchange-CrossTenant-AuthSource: CH0PR13MB5084.namprd13.prod.outlook.com
X-MS-Exchange-CrossTenant-Network-Message-Id: 5d1fce9c-c59c-40b5-72cd-08d9f5748d14
X-MS-Exchange-CrossTenant-originalarrivaltime: 21 Feb 2022 19:58:38.0481
 (UTC)
X-MS-Exchange-CrossTenant-fromentityheader: Hosted
X-MS-Exchange-CrossTenant-id: 0d4fed5c-3a70-46fe-9430-ece41741f59e
X-MS-Exchange-CrossTenant-mailboxtype: HOSTED
X-MS-Exchange-CrossTenant-userprincipalname: jSRuLfH/MzXO4kbrneazBkyJOMvAiJONsUgUZUB+y7FZ9Pq3k6tSVC+oPwmQ4oTTScckmrPYGyMTeuPCMTMelQ==
X-MS-Exchange-Transport-CrossTenantHeadersStamped: BYAPR13MB2582
X-Spam-Status: No, score=-2.0 required=5.0 tests=BAYES_00,DKIM_SIGNED,
	DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS,
	MAILING_LIST_MULTI,RDNS_NONE,SPF_HELO_NONE,T_SCC_BODY_TEXT_LINE
	autolearn=no autolearn_force=no version=3.4.6
X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on
	lindbergh.monkeyblade.net
Precedence: bulk
List-ID: <linux-nfs.vger.kernel.org>
X-Mailing-List: linux-nfs@vger.kernel.org
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=