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Tue, 6 Sep 2022 14:47:58 GMT Received: from b06wcsmtp001.portsmouth.uk.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 8C6A4A405C; Tue, 6 Sep 2022 14:47:58 +0000 (GMT) Received: from b06wcsmtp001.portsmouth.uk.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 69530A4054; Tue, 6 Sep 2022 14:47:57 +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 14:47:57 +0000 (GMT) Message-ID: <98d5f462-c4dc-a967-0ab0-f24dd3e37dff@linux.ibm.com> Date: Tue, 6 Sep 2022 16:47:57 +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 09/28] mm/mempolicy: mark VMA as locked when changing protection policy 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> <20220901173516.702122-10-surenb@google.com> From: Laurent Dufour In-Reply-To: <20220901173516.702122-10-surenb@google.com> X-TM-AS-GCONF: 00 X-Proofpoint-GUID: 7I7HaW_zSPCUESol8JKQ6keMsvh5MEMI X-Proofpoint-ORIG-GUID: n0vpG0zoQiPRwb2hnQ9A_0zBzLzp1LaC 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 clxscore=1015 impostorscore=0 lowpriorityscore=0 mlxscore=0 suspectscore=0 spamscore=0 bulkscore=0 phishscore=0 mlxlogscore=959 malwarescore=0 adultscore=0 priorityscore=1501 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2207270000 definitions=main-2209060070 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20220906_074823_966925_56372E04 X-CRM114-Status: GOOD ( 22.02 ) 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 UHJvdGVjdCBWTUEgZnJvbSBjb25jdXJyZW50IHBhZ2UgZmF1bHQgaGFuZGxlciB3aGlsZSBwZXJm b3JtaW5nIFZNQQo+IHByb3RlY3Rpb24gcG9saWN5IGNoYW5nZXMuCj4gCj4gU2lnbmVkLW9mZi1i eTogU3VyZW4gQmFnaGRhc2FyeWFuIDxzdXJlbmJAZ29vZ2xlLmNvbT4KPiAtLS0KPiAgbW0vbWVt cG9saWN5LmMgfCA2ICsrKysrLQo+ICAxIGZpbGUgY2hhbmdlZCwgNSBpbnNlcnRpb25zKCspLCAx IGRlbGV0aW9uKC0pCj4gCj4gZGlmZiAtLWdpdCBhL21tL21lbXBvbGljeS5jIGIvbW0vbWVtcG9s aWN5LmMKPiBpbmRleCBiNzNkMzI0OGQ5NzYuLjZiZTFlNWM3NTU1NiAxMDA2NDQKPiAtLS0gYS9t bS9tZW1wb2xpY3kuYwo+ICsrKyBiL21tL21lbXBvbGljeS5jCj4gQEAgLTM4Myw4ICszODMsMTAg QEAgdm9pZCBtcG9sX3JlYmluZF9tbShzdHJ1Y3QgbW1fc3RydWN0ICptbSwgbm9kZW1hc2tfdCAq bmV3KQo+ICAJc3RydWN0IHZtX2FyZWFfc3RydWN0ICp2bWE7Cj4gIAo+ICAJbW1hcF93cml0ZV9s b2NrKG1tKTsKPiAtCWZvciAodm1hID0gbW0tPm1tYXA7IHZtYTsgdm1hID0gdm1hLT52bV9uZXh0 KQo+ICsJZm9yICh2bWEgPSBtbS0+bW1hcDsgdm1hOyB2bWEgPSB2bWEtPnZtX25leHQpIHsKPiAr CQl2bWFfbWFya19sb2NrZWQodm1hKTsKPiAgCQltcG9sX3JlYmluZF9wb2xpY3kodm1hLT52bV9w b2xpY3ksIG5ldyk7Cj4gKwl9Cj4gIAltbWFwX3dyaXRlX3VubG9jayhtbSk7Cj4gIH0KPiAgCj4g QEAgLTYzMiw2ICs2MzQsNyBAQCB1bnNpZ25lZCBsb25nIGNoYW5nZV9wcm90X251bWEoc3RydWN0 IHZtX2FyZWFfc3RydWN0ICp2bWEsCj4gIAlzdHJ1Y3QgbW11X2dhdGhlciB0bGI7Cj4gIAlpbnQg bnJfdXBkYXRlZDsKPiAgCj4gKwl2bWFfbWFya19sb2NrZWQodm1hKTsKCklmIEkgdW5kZXJzdGFu ZCB0aGF0IGNvcnJldGx5LCB0aGUgVk1BIGl0c2VsZiBpcyBub3QgaW1wYWN0ZWQsIG9ubHkgdGhl ClBNRHMvUFRFcywgYW5kIHRoZXkgYXJlIHByb3RlY3RlZCB1c2luZyB0aGUgcGFnZSB0YWJsZSBs b2Nrcy4KCkFtIEkgbWlzc2luZyBzb21ldGhpbmc/Cgo+ICAJdGxiX2dhdGhlcl9tbXUoJnRsYiwg dm1hLT52bV9tbSk7Cj4gIAo+ICAJbnJfdXBkYXRlZCA9IGNoYW5nZV9wcm90ZWN0aW9uKCZ0bGIs IHZtYSwgYWRkciwgZW5kLCBQQUdFX05PTkUsCj4gQEAgLTc2NSw2ICs3NjgsNyBAQCBzdGF0aWMg aW50IHZtYV9yZXBsYWNlX3BvbGljeShzdHJ1Y3Qgdm1fYXJlYV9zdHJ1Y3QgKnZtYSwKPiAgCWlm IChJU19FUlIobmV3KSkKPiAgCQlyZXR1cm4gUFRSX0VSUihuZXcpOwo+ICAKPiArCXZtYV9tYXJr X2xvY2tlZCh2bWEpOwo+ICAJaWYgKHZtYS0+dm1fb3BzICYmIHZtYS0+dm1fb3BzLT5zZXRfcG9s aWN5KSB7Cj4gIAkJZXJyID0gdm1hLT52bV9vcHMtPnNldF9wb2xpY3kodm1hLCBuZXcpOwo+ICAJ CWlmIChlcnIpCgoKX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19f X18KbGludXgtYXJtLWtlcm5lbCBtYWlsaW5nIGxpc3QKbGludXgtYXJtLWtlcm5lbEBsaXN0cy5p bmZyYWRlYWQub3JnCmh0dHA6Ly9saXN0cy5pbmZyYWRlYWQub3JnL21haWxtYW4vbGlzdGluZm8v bGludXgtYXJtLWtlcm5lbAo=