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Fri, 9 Sep 2022 14:38:28 GMT Received: from d06av24.portsmouth.uk.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 818724203F; Fri, 9 Sep 2022 14:38:28 +0000 (GMT) Received: from d06av24.portsmouth.uk.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 733AD42042; Fri, 9 Sep 2022 14:38:27 +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 14:38:27 +0000 (GMT) Message-ID: <630714df-dec1-4a41-6af3-380181d11669@linux.ibm.com> Date: Fri, 9 Sep 2022 16:38:27 +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 21/28] mm: introduce find_and_lock_anon_vma to be used from arch-specific code 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> <20220901173516.702122-22-surenb@google.com> From: Laurent Dufour In-Reply-To: <20220901173516.702122-22-surenb@google.com> X-TM-AS-GCONF: 00 X-Proofpoint-ORIG-GUID: IcRKhDOEa6Ts-ePGWWJKeMBqdv8Loc-W X-Proofpoint-GUID: 0Yk3VPJJRdSVQygJF41M58APoGFE1EH4 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 mlxlogscore=601 phishscore=0 mlxscore=0 priorityscore=1501 adultscore=0 impostorscore=0 bulkscore=0 clxscore=1015 malwarescore=0 suspectscore=0 lowpriorityscore=0 spamscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2207270000 definitions=main-2209090051 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20220909_073847_541428_54E54006 X-CRM114-Status: GOOD ( 28.56 ) 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 SW50cm9kdWNlIGZpbmRfYW5kX2xvY2tfYW5vbl92bWEgZnVuY3Rpb24gdG8gbG9va3VwIGFuZCBs b2NrIGFuIGFub255bW91cwo+IFZNQSBkdXJpbmcgcGFnZSBmYXVsdCBoYW5kbGluZy4gV2hlbiBW TUEgaXMgbm90IGZvdW5kLCBjYW4ndCBiZSBsb2NrZWQKPiBvciBjaGFuZ2VzIGFmdGVyIGJlaW5n IGxvY2tlZCwgdGhlIGZ1bmN0aW9uIHJldHVybnMgTlVMTC4gVGhlIGxvb2t1cCBpcwo+IHBlcmZv cm1lZCB1bmRlciBSQ1UgcHJvdGVjdGlvbiB0byBwcmV2ZW50IHRoZSBmb3VuZCBWTUEgZnJvbSBi ZWluZwo+IGRlc3Ryb3llZCBiZWZvcmUgdGhlIFZNQSBsb2NrIGlzIGFjcXVpcmVkLiBWTUEgbG9j ayBzdGF0aXN0aWNzIGFyZQo+IHVwZGF0ZWQgYWNjb3JkaW5nIHRvIHRoZSByZXN1bHRzLgo+IAo+ IFNpZ25lZC1vZmYtYnk6IFN1cmVuIEJhZ2hkYXNhcnlhbiA8c3VyZW5iQGdvb2dsZS5jb20+Cj4g LS0tCj4gIGluY2x1ZGUvbGludXgvbW0uaCB8ICAzICsrKwo+ICBtbS9tZW1vcnkuYyAgICAgICAg fCA0NSArKysrKysrKysrKysrKysrKysrKysrKysrKysrKysrKysrKysrKysrKysrKysKPiAgMiBm aWxlcyBjaGFuZ2VkLCA0OCBpbnNlcnRpb25zKCspCj4gCj4gZGlmZiAtLWdpdCBhL2luY2x1ZGUv bGludXgvbW0uaCBiL2luY2x1ZGUvbGludXgvbW0uaAo+IGluZGV4IDdjMzE5MGVhYWJkNy4uYTNj YmFhN2I5MTE5IDEwMDY0NAo+IC0tLSBhL2luY2x1ZGUvbGludXgvbW0uaAo+ICsrKyBiL2luY2x1 ZGUvbGludXgvbW0uaAo+IEBAIC02ODQsNiArNjg0LDkgQEAgc3RhdGljIGlubGluZSB2b2lkIHZt YV9hc3NlcnRfbm9fcmVhZGVyKHN0cnVjdCB2bV9hcmVhX3N0cnVjdCAqdm1hKQo+ICAJCSAgICAg IHZtYSk7Cj4gIH0KPiAgCj4gK3N0cnVjdCB2bV9hcmVhX3N0cnVjdCAqZmluZF9hbmRfbG9ja19h bm9uX3ZtYShzdHJ1Y3QgbW1fc3RydWN0ICptbSwKPiArCQkJCQkgICAgICB1bnNpZ25lZCBsb25n IGFkZHJlc3MpOwo+ICsKPiAgI2Vsc2UgLyogQ09ORklHX1BFUl9WTUFfTE9DSyAqLwo+ICAKPiAg c3RhdGljIGlubGluZSB2b2lkIHZtYV9pbml0X2xvY2soc3RydWN0IHZtX2FyZWFfc3RydWN0ICp2 bWEpIHt9Cj4gZGlmZiAtLWdpdCBhL21tL21lbW9yeS5jIGIvbW0vbWVtb3J5LmMKPiBpbmRleCAy OWQyZjQ5ZjkyMmEuLmJmNTU3ZjcwNTZkZSAxMDA2NDQKPiAtLS0gYS9tbS9tZW1vcnkuYwo+ICsr KyBiL21tL21lbW9yeS5jCj4gQEAgLTUxODMsNiArNTE4Myw1MSBAQCB2bV9mYXVsdF90IGhhbmRs ZV9tbV9mYXVsdChzdHJ1Y3Qgdm1fYXJlYV9zdHJ1Y3QgKnZtYSwgdW5zaWduZWQgbG9uZyBhZGRy ZXNzLAo+ICB9Cj4gIEVYUE9SVF9TWU1CT0xfR1BMKGhhbmRsZV9tbV9mYXVsdCk7Cj4gIAo+ICsj aWZkZWYgQ09ORklHX1BFUl9WTUFfTE9DSwo+ICtzdGF0aWMgaW5saW5lIHN0cnVjdCB2bV9hcmVh X3N0cnVjdCAqZmluZF92bWFfdW5kZXJfcmN1KHN0cnVjdCBtbV9zdHJ1Y3QgKm1tLAo+ICsJCQkJ CQkJdW5zaWduZWQgbG9uZyBhZGRyZXNzKQo+ICt7Cj4gKwlzdHJ1Y3Qgdm1fYXJlYV9zdHJ1Y3Qg KnZtYSA9IF9fZmluZF92bWEobW0sIGFkZHJlc3MpOwo+ICsKPiArCWlmICghdm1hIHx8IHZtYS0+ dm1fc3RhcnQgPiBhZGRyZXNzKQo+ICsJCXJldHVybiBOVUxMOwo+ICsKPiArCWlmICghdm1hX2lz X2Fub255bW91cyh2bWEpKQo+ICsJCXJldHVybiBOVUxMOwo+ICsKCkl0IGxvb2tzIHRvIG1lIG1v cmUgbmF0dXJhbCB0byBmaXJzdCBjaGVjayB0aGF0IHRoZSBWTUEgaXMgcGFydCBvZiB0aGUgUkIK dHJlZSBiZWZvcmUgdHJ5IHJlYWQgbG9ja2luZyBpdC4KCj4gKwlpZiAoIXZtYV9yZWFkX3RyeWxv Y2sodm1hKSkgewo+ICsJCWNvdW50X3ZtX3ZtYV9sb2NrX2V2ZW50KFZNQV9MT0NLX0FCT1JUKTsK PiArCQlyZXR1cm4gTlVMTDsKPiArCX0KPiArCj4gKwkvKiBDaGVjayBpZiB0aGUgVk1BIGdvdCBp c29sYXRlZCBhZnRlciB3ZSBmb3VuZCBpdCAqLwo+ICsJaWYgKFJCX0VNUFRZX05PREUoJnZtYS0+ dm1fcmIpKSB7Cj4gKwkJdm1hX3JlYWRfdW5sb2NrKHZtYSk7Cj4gKwkJY291bnRfdm1fdm1hX2xv Y2tfZXZlbnQoVk1BX0xPQ0tfTUlTUyk7Cj4gKwkJcmV0dXJuIE5VTEw7Cj4gKwl9Cj4gKwo+ICsJ cmV0dXJuIHZtYTsKPiArfQo+ICsKPiArLyoKPiArICogTG9va3VwIGFuZCBsb2NrIGFuZCBhbm9u eW1vdXMgVk1BLiBSZXR1cm5lZCBWTUEgaXMgZ3VhcmFudGVlZCB0byBiZSBzdGFibGUKPiArICog YW5kIG5vdCBpc29sYXRlZC4gSWYgdGhlIFZNQSBpcyBub3QgZm91bmQgb2YgaXMgYmVpbmcgbW9k aWZpZWQgdGhlIGZ1bmN0aW9uCj4gKyAqIHJldHVybnMgTlVMTC4KPiArICovCj4gK3N0cnVjdCB2 bV9hcmVhX3N0cnVjdCAqZmluZF9hbmRfbG9ja19hbm9uX3ZtYShzdHJ1Y3QgbW1fc3RydWN0ICpt bSwKPiArCQkJCQkgICAgICB1bnNpZ25lZCBsb25nIGFkZHJlc3MpCj4gK3sKPiArCXN0cnVjdCB2 bV9hcmVhX3N0cnVjdCAqdm1hOwo+ICsKPiArCXJjdV9yZWFkX2xvY2soKTsKPiArCXZtYSA9IGZp bmRfdm1hX3VuZGVyX3JjdShtbSwgYWRkcmVzcyk7Cj4gKwlyY3VfcmVhZF91bmxvY2soKTsKPiAr Cj4gKwlyZXR1cm4gdm1hOwo+ICt9Cj4gKyNlbmRpZiAvKiBDT05GSUdfUEVSX1ZNQV9MT0NLICov Cj4gKwo+ICAjaWZuZGVmIF9fUEFHRVRBQkxFX1A0RF9GT0xERUQKPiAgLyoKPiAgICogQWxsb2Nh dGUgcDRkIHBhZ2UgdGFibGUuCgoKX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19f X19fX19fX19fX18KbGludXgtYXJtLWtlcm5lbCBtYWlsaW5nIGxpc3QKbGludXgtYXJtLWtlcm5l bEBsaXN0cy5pbmZyYWRlYWQub3JnCmh0dHA6Ly9saXN0cy5pbmZyYWRlYWQub3JnL21haWxtYW4v bGlzdGluZm8vbGludXgtYXJtLWtlcm5lbAo=