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 Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id ED826E7F154 for ; Wed, 27 Sep 2023 03:00:34 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S235783AbjI0DAe (ORCPT ); Tue, 26 Sep 2023 23:00:34 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:59546 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S235925AbjI0C6c (ORCPT ); Tue, 26 Sep 2023 22:58:32 -0400 Received: from shelob.surriel.com (shelob.surriel.com [96.67.55.147]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 72D8210E9 for ; Tue, 26 Sep 2023 16:58:10 -0700 (PDT) Received: from imladris.home.surriel.com ([10.0.13.28] helo=imladris.surriel.com) by shelob.surriel.com with esmtpsa (TLS1.2) tls TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384 (Exim 4.96) (envelope-from ) id 1qlHvq-0007JE-0r; Tue, 26 Sep 2023 19:57:34 -0400 Message-ID: Subject: Re: [PATCH 2/3] hugetlbfs: close race between MADV_DONTNEED and page fault From: Rik van Riel To: Andrew Morton Cc: linux-kernel@vger.kernel.org, kernel-team@meta.com, linux-mm@kvack.org, muchun.song@linux.dev, mike.kravetz@oracle.com, leit@meta.com, willy@infradead.org Date: Tue, 26 Sep 2023 19:57:34 -0400 In-Reply-To: <20230926141530.26bc8550f2f2411945b566f1@linux-foundation.org> References: <20230926031245.795759-1-riel@surriel.com> <20230926031245.795759-3-riel@surriel.com> <20230926141530.26bc8550f2f2411945b566f1@linux-foundation.org> Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: base64 User-Agent: Evolution 3.46.4 (3.46.4-1.fc37) MIME-Version: 1.0 Sender: riel@surriel.com Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org T24gVHVlLCAyMDIzLTA5LTI2IGF0IDE0OjE1IC0wNzAwLCBBbmRyZXcgTW9ydG9uIHdyb3RlOgo+ IE9uIE1vbiwgMjUgU2VwIDIwMjMgMjM6MTA6NTEgLTA0MDAgcmllbEBzdXJyaWVsLmNvbcKgd3Jv dGU6Cj4gCj4gPiBGcm9tOiBSaWsgdmFuIFJpZWwgPHJpZWxAc3VycmllbC5jb20+Cj4gPiAKPiA+ IE1hbGxvYyBsaWJyYXJpZXMsIGxpa2UgamVtYWxsb2MgYW5kIHRjYWxsb2MsIHRha2UgZGVjaXNp b25zIG9uIHdoZW4KPiA+IHRvIGNhbGwgbWFkdmlzZSBpbmRlcGVuZGVudGx5IGZyb20gdGhlIGNv ZGUgaW4gdGhlIG1haW4KPiA+IGFwcGxpY2F0aW9uLgo+ID4gCj4gPiBUaGlzIHNvbWV0aW1lcyBy ZXN1bHRzIGluIHRoZSBhcHBsaWNhdGlvbiBwYWdlIGZhdWx0aW5nIG9uIGFuCj4gPiBhZGRyZXNz LAo+ID4gcmlnaHQgYWZ0ZXIgdGhlIG1hbGxvYyBsaWJyYXJ5IGhhcyBzaG90IGRvd24gdGhlIGJh Y2tpbmcgbWVtb3J5Cj4gPiB3aXRoCj4gPiBNQURWX0RPTlRORUVELgo+ID4gCj4gPiBVc3VhbGx5 IHRoaXMgaXMgaGFybWxlc3MsIGJlY2F1c2Ugd2UgYWx3YXlzIGhhdmUgc29tZSA0a0IgcGFnZXMK PiA+IHNpdHRpbmcgYXJvdW5kIHRvIHNhdGlzZnkgYSBwYWdlIGZhdWx0LiBIb3dldmVyLCB3aXRo IGh1Z2V0bGJmcwo+ID4gc3lzdGVtcyBvZnRlbiBhbGxvY2F0ZSBvbmx5IHRoZSBleGFjdCBudW1i ZXIgb2YgaHVnZSBwYWdlcyB0aGF0Cj4gPiB0aGUgYXBwbGljYXRpb24gd2FudHMuCj4gPiAKPiA+ IER1ZSB0byBUTEIgYmF0Y2hpbmcsIGh1Z2V0bGJmcyBNQURWX0RPTlRORUVEIHdpbGwgZnJlZSBw YWdlcwo+ID4gb3V0c2lkZSBvZgo+ID4gYW55IGxvY2sgdGFrZW4gb24gdGhlIHBhZ2UgZmF1bHQg cGF0aCwgd2hpY2ggY2FuIG9wZW4gdXAgdGhlCj4gPiBmb2xsb3dpbmcKPiA+IHJhY2UgY29uZGl0 aW9uOgo+ID4gCj4gPiDCoMKgwqDCoMKgwqAgQ1BVIDHCoMKgwqDCoMKgwqDCoMKgwqDCoMKgwqDC oMKgwqDCoMKgwqDCoMKgwqDCoMKgwqDCoMKgwqAgQ1BVIDIKPiA+IAo+ID4gwqDCoMKgwqDCoMKg IE1BRFZfRE9OVE5FRUQKPiA+IMKgwqDCoMKgwqDCoCB1bm1hcCBwYWdlCj4gPiDCoMKgwqDCoMKg wqAgc2hvb3QgZG93biBUTEIgZW50cnkKPiA+IMKgwqDCoMKgwqDCoMKgwqDCoMKgwqDCoMKgwqDC oMKgwqDCoMKgwqDCoMKgwqDCoMKgwqDCoMKgwqDCoMKgwqDCoMKgwqDCoMKgwqAgcGFnZSBmYXVs dAo+ID4gwqDCoMKgwqDCoMKgwqDCoMKgwqDCoMKgwqDCoMKgwqDCoMKgwqDCoMKgwqDCoMKgwqDC oMKgwqDCoMKgwqDCoMKgwqDCoMKgwqDCoCBmYWlsIHRvIGFsbG9jYXRlIGEgaHVnZSBwYWdlCj4g PiDCoMKgwqDCoMKgwqDCoMKgwqDCoMKgwqDCoMKgwqDCoMKgwqDCoMKgwqDCoMKgwqDCoMKgwqDC oMKgwqDCoMKgwqDCoMKgwqDCoMKgIGtpbGxlZCB3aXRoIFNJR0JVUwo+ID4gwqDCoMKgwqDCoMKg IGZyZWUgcGFnZQo+ID4gCj4gPiBGaXggdGhhdCByYWNlIGJ5IHB1bGxpbmcgdGhlIGxvY2tpbmcg ZnJvbQo+ID4gX191bm1hcF9odWdlcGFnZV9maW5hbF9yYW5nZQo+ID4gaW50byBoZWxwZXIgZnVu Y3Rpb25zIGNhbGxlZCBmcm9tIHphcF9wYWdlX3JhbmdlX3NpbmdsZS4gVGhpcwo+ID4gZW5zdXJl cwo+ID4gcGFnZSBmYXVsdHMgc3RheSBsb2NrZWQgb3V0IG9mIHRoZSBNQURWX0RPTlRORUVEIFZN QSB1bnRpbCB0aGUKPiA+IGh1Z2UgcGFnZXMgaGF2ZSBhY3R1YWxseSBiZWVuIGZyZWVkLgo+ID4g Cj4gCj4gV2FzIGEgLXN0YWJsZSBiYWNrcG9ydCBjb25zaWRlcmVkPwo+IApUaGF0J3MgYSBnb29k IGlkZWEuIEknbGwgaGF2ZSB0byBzZWUgaG93IGZhciBiYWNrIAp0aGUgaHVnZXRsYl92bWFfKl9s b2NrIHN0dWZmIGV4aXN0cy4KCldlIHByb2JhYmx5IGRvbid0IHdhbnQgdG8gYmFja3BvcnQgYWxs IHRoZSByZXF1aXJlZAppbmZyYXN0cnVjdHVyZSBldmVyeXdoZXJlLgoKLS0gCkFsbCBSaWdodHMg UmV2ZXJzZWQuCg==