From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-3.8 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS autolearn=no autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 33368C07E95 for ; Wed, 7 Jul 2021 09:55:43 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 1BCF561CBA for ; Wed, 7 Jul 2021 09:55:43 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231276AbhGGJ6V (ORCPT ); Wed, 7 Jul 2021 05:58:21 -0400 Received: from eu-smtp-delivery-151.mimecast.com ([185.58.85.151]:34602 "EHLO eu-smtp-delivery-151.mimecast.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S230150AbhGGJ6T (ORCPT ); Wed, 7 Jul 2021 05:58:19 -0400 Received: from AcuMS.aculab.com (156.67.243.121 [156.67.243.121]) (Using TLS) by relay.mimecast.com with ESMTP id uk-mta-168-w7_5D2ULM7Sj_pMeGe5qtA-1; Wed, 07 Jul 2021 10:55:36 +0100 X-MC-Unique: w7_5D2ULM7Sj_pMeGe5qtA-1 Received: from AcuMS.Aculab.com (fd9f:af1c:a25b:0:994c:f5c2:35d6:9b65) by AcuMS.aculab.com (fd9f:af1c:a25b:0:994c:f5c2:35d6:9b65) with Microsoft SMTP Server (TLS) id 15.0.1497.18; Wed, 7 Jul 2021 10:55:35 +0100 Received: from AcuMS.Aculab.com ([fe80::994c:f5c2:35d6:9b65]) by AcuMS.aculab.com ([fe80::994c:f5c2:35d6:9b65%12]) with mapi id 15.00.1497.018; Wed, 7 Jul 2021 10:55:35 +0100 From: David Laight To: 'Robin Murphy' , Catalin Marinas CC: Chen Huang , Al Viro , Matthew Wilcox , Christoph Hellwig , Mark Rutland , Andrew Morton , Stephen Rothwell , "Randy Dunlap" , Will Deacon , Linux ARM , linux-mm , "open list" Subject: RE: [BUG] arm64: an infinite loop in generic_perform_write() Thread-Topic: [BUG] arm64: an infinite loop in generic_perform_write() Thread-Index: AQHXcpt1OwfjX4VCyEKfx+OvZYZ3DKs3RYEQ Date: Wed, 7 Jul 2021 09:55:35 +0000 Message-ID: <4a1473fc5af9496e9c8ed02c7f631d72@AcuMS.aculab.com> References: <1c635945-fb25-8871-7b34-f475f75b2caf@huawei.com> <27fbb8c1-2a65-738f-6bec-13f450395ab7@arm.com> <20210624185554.GC25097@arm.com> <20210625103905.GA20835@arm.com> <7f14271a-9b2f-1afc-3caf-c4e5b36efa73@arm.com> <20210706175052.GD15218@arm.com> In-Reply-To: Accept-Language: en-GB, en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: x-ms-exchange-transport-fromentityheader: Hosted x-originating-ip: [10.202.205.107] MIME-Version: 1.0 Authentication-Results: relay.mimecast.com; auth=pass smtp.auth=C51A453 smtp.mailfrom=david.laight@aculab.com X-Mimecast-Spam-Score: 0 X-Mimecast-Originator: aculab.com Content-Language: en-US Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: base64 Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org PiA+IEkgdGhpbmsgaXQncyB3b3J0aCBkb2luZyB0aGUgY29weV90b191c2VyKCkgZmFsbGJhY2sg aW4gYSBsb29wIHVudGlsIGl0DQo+ID4gZmF1bHRzIG9yIGhpdHMgdGhlIGVuZCBvZiB0aGUgYnVm ZmVyLiBUaGlzIHdvdWxkIHNvbHZlIHRoZSBwcm9ibGVtIHdlDQo+ID4gY3VycmVudGx5IGhhdmUg d2l0aCB3cml0aW5nIG1vcmUgYnl0ZXMgdGhhbiBhY3R1YWxseSByZXBvcnRlZC4gVGhlDQo+ID4g Y29weV9mcm9tX3VzZXIoKSBpcyBub3QgbmVjZXNzYXJ5LCBhIGJ5dGUgd291bGQgc3VmZmljZS4N Cj4gDQo+IFRoZSB0aGluZyBpcywgd2UgZG9uJ3QgcmVhbGx5IGhhdmUgdGhhdCBwcm9ibGVtIHNp bmNlIHRoZSBzZXRfZnMgY2xlYW51cA0KPiByZW1vdmVkIElNUC1ERUYgU1RQIGJlaGF2aW91ciBm cm9tIHRoZSBwaWN0dXJlIC0gZXZlbiB3aXRoIHRoZSBjdXJyZW50DQo+IG1lc3Mgd2UgY291bGQg cGVyZmVjdGx5IHdlbGwga25vdyB3aGljaCBvZiB0aGUgdHdvIFNUVFJzIGZhdWx0ZWQgaWYgd2UN Ci4uLg0KDQpUaGVyZSBpcyBhIG11Y2ggbW9yZSBpbnRlcmVzdGluZyBjYXNlIHRob3VnaC4NCkl0 IGlzIHBvc3NpYmxlIGZvciB1c2Vyc3BhY2UgdG8gaGF2ZSBzdXBwbGllZCBhIG1pc2FsaWduZWQN CmJ1ZmZlciB0aGF0IGlzIG1tYXBwZWQgdG8gYW4gSU8gYWRkcmVzcyB0aGF0IGRvZXNuJ3Qgc3Vw cG9ydA0KbWlzYWxpZ25lZCBhY2Nlc3NlcyBldmVuIHRob3VnaCBub3JtYWwgbWVtb3J5IGRvZXMg c3VwcG9ydCB0aGVtLg0KDQpTbyB0aGUgJ2J5dGUgcmV0cnknIGxvb3Agd291bGQgd29yayBmb3Ig dGhlIGVudGlyZSBidWZmZXIuDQoNCglEYXZpZA0KDQotDQpSZWdpc3RlcmVkIEFkZHJlc3MgTGFr ZXNpZGUsIEJyYW1sZXkgUm9hZCwgTW91bnQgRmFybSwgTWlsdG9uIEtleW5lcywgTUsxIDFQVCwg VUsNClJlZ2lzdHJhdGlvbiBObzogMTM5NzM4NiAoV2FsZXMpDQo=