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 bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 592B7ECAAD5 for ; Tue, 6 Sep 2022 16:14:45 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender: Content-Transfer-Encoding:Content-Type:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:In-Reply-To:From:References:Cc:To: Subject:MIME-Version:Date:Message-ID:Reply-To:Content-ID:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Owner; bh=Q0OwxolfM1wQZ1FabLanP6/N8PICNVuVuJp/05JNpEE=; b=37gL3mXV7eeAtV g1ZGdAdzWWd7drcw8Uo65Ae/043f6jdz/s+O6p506GYZ/oPPmlB5Hw1uSWuX2VKvousZ+3+F+X+tY MRtaou9hLAKQTOwRHj7n0gMgLAgdezE5v5nvnyOqRpWJOWZf/QNVvvXmcwfAJgRIJWzO5OZ+WoWc6 VbkneQv1Lguu/l8Q1CSNbpmzCSl4CIhGI2MNGgSwz9jTk4Ove45vFGXo+Ek9p1UC224MDe1HgnT6U PbIwISm8t660SWgvYUxVkq6290OBabT5GC+UsiTImrsrY1onJzVGqQNPlO1bSm/UPW0C6JnNhFH+B HiGjK18Sqite1bHvNakA==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.94.2 #2 (Red Hat Linux)) id 1oVbCI-00FG4F-Cl; Tue, 06 Sep 2022 16:13:10 +0000 Received: from mx0a-001b2d01.pphosted.com ([148.163.156.1]) by bombadil.infradead.org with esmtps (Exim 4.94.2 #2 (Red Hat Linux)) id 1oValH-00Exfz-4n for linux-arm-kernel@lists.infradead.org; Tue, 06 Sep 2022 15:45:16 +0000 Received: from pps.filterd (m0098399.ppops.net [127.0.0.1]) by mx0a-001b2d01.pphosted.com (8.17.1.5/8.17.1.5) with ESMTP id 286FcHE0023464; Tue, 6 Sep 2022 15:44:57 GMT DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=ibm.com; h=message-id : date : mime-version : subject : to : cc : references : from : in-reply-to : content-type : content-transfer-encoding; s=pp1; bh=4MkljBVDokyvV6hOWPaWLbtYatl+ONZEu/cDpFdhfog=; b=Fm+iNgkU5d4uKCI7Y1xRCitnpbuo/A24XIoPyCtfFTdo9mA03DlEDw03VU0vzA4hFfAc kQDEZphbp3WIsa/oiG9V2mArj+hG/lNOjmK0hdHk8I+0wR04Wzp4ep+J43OLvE+H1Yz1 2MOw0MK65npWrjR5L90MbVti0PXZzRqxTTW5bT9hPk9HYuKHgypTy70KjirGFWWxGYiu GsGpr89SmwoGpsvjMQ/lF/3Yw0lHZ6301qLgnVKnxUKdSBuw4XJ49AZACAY+QRe6SD7h dR31b8ygFBKNNQ9b8QhGdaQigvB05g10ZTni8oZjhV8GRActoQ6uT6kxXJgnDqZG5Wy+ DQ== Received: from pps.reinject (localhost [127.0.0.1]) by mx0a-001b2d01.pphosted.com (PPS) with ESMTPS id 3je8su90qt-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Tue, 06 Sep 2022 15:44:57 +0000 Received: from m0098399.ppops.net (m0098399.ppops.net [127.0.0.1]) by pps.reinject (8.17.1.5/8.17.1.5) with ESMTP id 286FcLWh023984; Tue, 6 Sep 2022 15:44:56 GMT Received: from ppma03fra.de.ibm.com (6b.4a.5195.ip4.static.sl-reverse.com [149.81.74.107]) by mx0a-001b2d01.pphosted.com (PPS) with ESMTPS id 3je8su90nq-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Tue, 06 Sep 2022 15:44:56 +0000 Received: from pps.filterd (ppma03fra.de.ibm.com [127.0.0.1]) by ppma03fra.de.ibm.com (8.16.1.2/8.16.1.2) with SMTP id 286FfwEK029294; Tue, 6 Sep 2022 15:44:52 GMT Received: from b06cxnps3074.portsmouth.uk.ibm.com (d06relay09.portsmouth.uk.ibm.com [9.149.109.194]) by ppma03fra.de.ibm.com with ESMTP id 3jbxj8tx7t-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Tue, 06 Sep 2022 15:44:52 +0000 Received: from b06wcsmtp001.portsmouth.uk.ibm.com (b06wcsmtp001.portsmouth.uk.ibm.com [9.149.105.160]) by b06cxnps3074.portsmouth.uk.ibm.com (8.14.9/8.14.9/NCO v10.0) with ESMTP id 286FiodI41025964 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Tue, 6 Sep 2022 15:44:50 GMT Received: from b06wcsmtp001.portsmouth.uk.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 3A287A405B; Tue, 6 Sep 2022 15:44:50 +0000 (GMT) Received: from b06wcsmtp001.portsmouth.uk.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 15515A4054; Tue, 6 Sep 2022 15:44:49 +0000 (GMT) Received: from [9.101.4.33] (unknown [9.101.4.33]) by b06wcsmtp001.portsmouth.uk.ibm.com (Postfix) with ESMTP; Tue, 6 Sep 2022 15:44:49 +0000 (GMT) Message-ID: <70d59f18-472b-489c-ca4e-50e7d992b93e@linux.ibm.com> Date: Tue, 6 Sep 2022 17:44:48 +0200 MIME-Version: 1.0 User-Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.15; rv:102.0) Gecko/20100101 Thunderbird/102.2.0 Subject: Re: [RFC PATCH RESEND 11/28] mm/mmap: mark VMAs as locked before merging or splitting them Content-Language: fr To: Suren Baghdasaryan , akpm@linux-foundation.org Cc: michel@lespinasse.org, jglisse@google.com, mhocko@suse.com, vbabka@suse.cz, hannes@cmpxchg.org, mgorman@suse.de, dave@stgolabs.net, willy@infradead.org, liam.howlett@oracle.com, peterz@infradead.org, laurent.dufour@fr.ibm.com, paulmck@kernel.org, luto@kernel.org, songliubraving@fb.com, peterx@redhat.com, david@redhat.com, dhowells@redhat.com, hughd@google.com, bigeasy@linutronix.de, kent.overstreet@linux.dev, rientjes@google.com, axelrasmussen@google.com, joelaf@google.com, minchan@google.com, kernel-team@android.com, linux-mm@kvack.org, linux-arm-kernel@lists.infradead.org, linuxppc-dev@lists.ozlabs.org, x86@kernel.org, linux-kernel@vger.kernel.org References: <20220901173516.702122-1-surenb@google.com> <20220901173516.702122-12-surenb@google.com> From: Laurent Dufour In-Reply-To: <20220901173516.702122-12-surenb@google.com> X-TM-AS-GCONF: 00 X-Proofpoint-GUID: 825aBYYK_9T5U_u_iVzb9oKQMAjxZkqg X-Proofpoint-ORIG-GUID: BKjiziNjdxx17PCzm6Fd6iufU577aiSy X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.205,Aquarius:18.0.895,Hydra:6.0.528,FMLib:17.11.122.1 definitions=2022-09-06_07,2022-09-06_02,2022-06-22_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 lowpriorityscore=0 impostorscore=0 malwarescore=0 priorityscore=1501 suspectscore=0 mlxlogscore=729 clxscore=1015 mlxscore=0 adultscore=0 bulkscore=0 spamscore=0 phishscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2207270000 definitions=main-2209060073 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20220906_084515_249249_519048B1 X-CRM114-Status: GOOD ( 25.11 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: base64 Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org TGUgMDEvMDkvMjAyMiDDoCAxOTozNCwgU3VyZW4gQmFnaGRhc2FyeWFuIGEgw6ljcml0wqA6Cj4g RGVjaXNpb25zIGFib3V0IHdoZXRoZXIgVk1BcyBjYW4gYmUgbWVyZ2VkIG9yIHNwbGl0IG11c3Qg YmUgbWFkZSB3aGlsZQo+IFZNQXMgYXJlIHByb3RlY3RlZCBmcm9tIHRoZSBjaGFuZ2VzIHdoaWNo IGNhbiBhZmZlY3QgdGhhdCBkZWNpc2lvbi4KPiBGb3IgZXhhbXBsZSwgbWVyZ2Vfdm1hIHVzZXMg dm1hLT5hbm9uX3ZtYSBpbiBpdHMgZGVjaXNpb24gd2hldGhlciB0aGUKPiBWTUEgY2FuIGJlIG1l cmdlZC4gTWVhbndoaWxlLCBwYWdlIGZhdWx0IGhhbmRsZXIgY2hhbmdlcyB2bWEtPmFub25fdm1h Cj4gZHVyaW5nIENPVyBvcGVyYXRpb24uCj4gTWFyayBhbGwgVk1BcyB3aGljaCBtaWdodCBiZSBh ZmZlY3RlZCBieSBhIG1lcmdlIG9yIHNwbGl0IG9wZXJhdGlvbiBhcwo+IGxvY2tlZCBiZWZvcmUg bWFraW5nIGRlY2lzaW9uIGhvdyBzdWNoIG9wZXJhdGlvbnMgc2hvdWxkIGJlIHBlcmZvcm1lZC4K PiAKPiBTaWduZWQtb2ZmLWJ5OiBTdXJlbiBCYWdoZGFzYXJ5YW4gPHN1cmVuYkBnb29nbGUuY29t Pgo+IC0tLQo+ICBtbS9tbWFwLmMgfCAxMCArKysrKysrKystCj4gIDEgZmlsZSBjaGFuZ2VkLCA5 IGluc2VydGlvbnMoKyksIDEgZGVsZXRpb24oLSkKPiAKPiBkaWZmIC0tZ2l0IGEvbW0vbW1hcC5j IGIvbW0vbW1hcC5jCj4gaW5kZXggZWQ1OGNmMDY4OWIyLi5hZGUzOTA5Yzg5YjQgMTAwNjQ0Cj4g LS0tIGEvbW0vbW1hcC5jCj4gKysrIGIvbW0vbW1hcC5jCj4gQEAgLTExNDcsMTAgKzExNDcsMTcg QEAgc3RydWN0IHZtX2FyZWFfc3RydWN0ICp2bWFfbWVyZ2Uoc3RydWN0IG1tX3N0cnVjdCAqbW0s Cj4gIAlpZiAodm1fZmxhZ3MgJiBWTV9TUEVDSUFMKQo+ICAJCXJldHVybiBOVUxMOwo+ICAKPiAr CWlmIChwcmV2KQo+ICsJCXZtYV9tYXJrX2xvY2tlZChwcmV2KTsKPiAgCW5leHQgPSB2bWFfbmV4 dChtbSwgcHJldik7Cj4gIAlhcmVhID0gbmV4dDsKPiAtCWlmIChhcmVhICYmIGFyZWEtPnZtX2Vu ZCA9PSBlbmQpCQkvKiBjYXNlcyA2LCA3LCA4ICovCj4gKwlpZiAoYXJlYSkKPiArCQl2bWFfbWFy a19sb2NrZWQoYXJlYSk7Cj4gKwlpZiAoYXJlYSAmJiBhcmVhLT52bV9lbmQgPT0gZW5kKSB7CQkv KiBjYXNlcyA2LCA3LCA4ICovCj4gIAkJbmV4dCA9IG5leHQtPnZtX25leHQ7Cj4gKwkJaWYgKG5l eHQpCj4gKwkJCXZtYV9tYXJrX2xvY2tlZChuZXh0KTsKPiArCX0KPiAgCj4gIAkvKiB2ZXJpZnkg c29tZSBpbnZhcmlhbnQgdGhhdCBtdXN0IGJlIGVuZm9yY2VkIGJ5IHRoZSBjYWxsZXIgKi8KPiAg CVZNX1dBUk5fT04ocHJldiAmJiBhZGRyIDw9IHByZXYtPnZtX3N0YXJ0KTsKPiBAQCAtMjY4Nyw2 ICsyNjk0LDcgQEAgaW50IF9fc3BsaXRfdm1hKHN0cnVjdCBtbV9zdHJ1Y3QgKm1tLCBzdHJ1Y3Qg dm1fYXJlYV9zdHJ1Y3QgKnZtYSwKPiAgCXN0cnVjdCB2bV9hcmVhX3N0cnVjdCAqbmV3Owo+ICAJ aW50IGVycjsKPiAgCj4gKwl2bWFfbWFya19sb2NrZWQodm1hKTsKPiAgCWlmICh2bWEtPnZtX29w cyAmJiB2bWEtPnZtX29wcy0+bWF5X3NwbGl0KSB7Cj4gIAkJZXJyID0gdm1hLT52bV9vcHMtPm1h eV9zcGxpdCh2bWEsIGFkZHIpOwo+ICAJCWlmIChlcnIpCgpUaGF0IGxvb2tzIGdvb2QgdG8gbWUs IHRoZSBuZXcgVk1BIGFsbG9jYXRlZCBieSB2bV9hcmVhX2R1cCh2bWEpIGlzCmluaGVyaXRpbmcg dGhlIGxvY2tlZCBzdGF0ZSBmcm9tIHZtYS4KClJldmlld2VkLWJ5OiBMYXVyZW50IER1Zm91ciA8 bGF1cmVudC5kdWZvdXJAZnIuaWJtLmNvbT4KCl9fX19fX19fX19fX19fX19fX19fX19fX19fX19f X19fX19fX19fX19fX19fX19fCmxpbnV4LWFybS1rZXJuZWwgbWFpbGluZyBsaXN0CmxpbnV4LWFy bS1rZXJuZWxAbGlzdHMuaW5mcmFkZWFkLm9yZwpodHRwOi8vbGlzdHMuaW5mcmFkZWFkLm9yZy9t YWlsbWFuL2xpc3RpbmZvL2xpbnV4LWFybS1rZXJuZWwK