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Fri, 9 Sep 2022 13:43:29 GMT Received: from d06av24.portsmouth.uk.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id A7FDE42047; Fri, 9 Sep 2022 13:43:29 +0000 (GMT) Received: from d06av24.portsmouth.uk.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 9374A4203F; Fri, 9 Sep 2022 13:43:28 +0000 (GMT) Received: from [9.145.83.17] (unknown [9.145.83.17]) by d06av24.portsmouth.uk.ibm.com (Postfix) with ESMTP; Fri, 9 Sep 2022 13:43:28 +0000 (GMT) Message-ID: <83a36761-2045-3f46-3088-a751c5263b81@linux.ibm.com> Date: Fri, 9 Sep 2022 15:43:28 +0200 MIME-Version: 1.0 User-Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.15; rv:102.0) Gecko/20100101 Thunderbird/102.2.1 Subject: Re: [RFC PATCH RESEND 15/28] mm/mmap: mark adjacent VMAs as locked if they can grow into unmapped area 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> <20220901173516.702122-16-surenb@google.com> From: Laurent Dufour In-Reply-To: <20220901173516.702122-16-surenb@google.com> X-TM-AS-GCONF: 00 X-Proofpoint-GUID: vsmxLApnSa4kFm4DsE4c9nzLp7_dueVe X-Proofpoint-ORIG-GUID: _47dY4KcG9Nanbo62JUX-I9vUetE4UJD 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=2022-09-09_08,2022-09-09_01,2022-06-22_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 impostorscore=0 priorityscore=1501 mlxscore=0 bulkscore=0 adultscore=0 clxscore=1015 lowpriorityscore=0 spamscore=0 malwarescore=0 mlxlogscore=894 phishscore=0 suspectscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2207270000 definitions=main-2209090047 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20220909_064353_332290_9AE4B589 X-CRM114-Status: GOOD ( 21.42 ) 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 TGUgMDEvMDkvMjAyMiDDoCAxOTozNSwgU3VyZW4gQmFnaGRhc2FyeWFuIGEgw6ljcml0wqA6Cj4g V2hpbGUgdW5tYXBwaW5nIFZNQXMsIGFkamFjZW50IFZNQXMgbWlnaHQgYmUgYWJsZSB0byBncm93 IGludG8gdGhlIGFyZWEKPiBiZWluZyB1bm1hcHBlZC4gSW4gc3VjaCBjYXNlcyBtYXJrIGFkamFj ZW50IFZNQXMgYXMgbG9ja2VkIHRvIHByZXZlbnQKPiB0aGlzIGdyb3d0aC4KPiAKPiBTaWduZWQt b2ZmLWJ5OiBTdXJlbiBCYWdoZGFzYXJ5YW4gPHN1cmVuYkBnb29nbGUuY29tPgo+IC0tLQo+ICBt bS9tbWFwLmMgfCA4ICsrKysrKy0tCj4gIDEgZmlsZSBjaGFuZ2VkLCA2IGluc2VydGlvbnMoKyks IDIgZGVsZXRpb25zKC0pCj4gCj4gZGlmZiAtLWdpdCBhL21tL21tYXAuYyBiL21tL21tYXAuYwo+ IGluZGV4IGIwZDc4YmRjMGRlMC4uYjMxY2M5N2MyODAzIDEwMDY0NAo+IC0tLSBhL21tL21tYXAu Ywo+ICsrKyBiL21tL21tYXAuYwo+IEBAIC0yNjgwLDEwICsyNjgwLDE0IEBAIGRldGFjaF92bWFz X3RvX2JlX3VubWFwcGVkKHN0cnVjdCBtbV9zdHJ1Y3QgKm1tLCBzdHJ1Y3Qgdm1fYXJlYV9zdHJ1 Y3QgKnZtYSwKPiAgCSAqIFZNX0dST1dTVVAgVk1BLiBTdWNoIFZNQXMgY2FuIGNoYW5nZSB0aGVp ciBzaXplIHVuZGVyCj4gIAkgKiBkb3duX3JlYWQobW1hcF9sb2NrKSBhbmQgY29sbGlkZSB3aXRo IHRoZSBWTUEgd2UgYXJlIGFib3V0IHRvIHVubWFwLgo+ICAJICovCj4gLQlpZiAodm1hICYmICh2 bWEtPnZtX2ZsYWdzICYgVk1fR1JPV1NET1dOKSkKPiArCWlmICh2bWEgJiYgKHZtYS0+dm1fZmxh Z3MgJiBWTV9HUk9XU0RPV04pKSB7Cj4gKwkJdm1hX21hcmtfbG9ja2VkKHZtYSk7Cj4gIAkJcmV0 dXJuIGZhbHNlOwo+IC0JaWYgKHByZXYgJiYgKHByZXYtPnZtX2ZsYWdzICYgVk1fR1JPV1NVUCkp Cj4gKwl9Cj4gKwlpZiAocHJldiAmJiAocHJldi0+dm1fZmxhZ3MgJiBWTV9HUk9XU1VQKSkgewo+ ICsJCXZtYV9tYXJrX2xvY2tlZChwcmV2KTsKPiAgCQlyZXR1cm4gZmFsc2U7Cj4gKwl9Cj4gIAly ZXR1cm4gdHJ1ZTsKPiAgfQo+CgpUaGF0IGxvb2tzIHJpZ2h0IHRvIGJlLgoKQnV0LCBpbiBhZGRp dGlvbiB0byB0aGF0LCBsaWtlIHRoZSBwcmV2aW91cyBwYXRjaCwgYWxsIHRoZSBWTUFzIHRvIGJl CmRldGFjaGVkIGZyb20gdGhlIHRyZWUgaW4gdGhlIGxvb3AgYWJvdmUsIHNob3VsZCBiZSBtYXJr ZWQgbG9ja2VkIGp1c3QKYmVmb3JlIGNhbGxpbmcgdm1fcmJfZXJhc2UoKS4KCl9fX19fX19fX19f X19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fCmxpbnV4LWFybS1rZXJuZWwgbWFp bGluZyBsaXN0CmxpbnV4LWFybS1rZXJuZWxAbGlzdHMuaW5mcmFkZWFkLm9yZwpodHRwOi8vbGlz dHMuaW5mcmFkZWFkLm9yZy9tYWlsbWFuL2xpc3RpbmZvL2xpbnV4LWFybS1rZXJuZWwK