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Fri, 9 Sep 2022 14:23:01 GMT Received: from d06av24.portsmouth.uk.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 60D3042041; Fri, 9 Sep 2022 14:26:36 +0000 (GMT) Received: from d06av24.portsmouth.uk.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 530024203F; Fri, 9 Sep 2022 14:26:35 +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 14:26:35 +0000 (GMT) Message-ID: <5e086349-e12b-0e8f-6100-1814e0c185fe@linux.ibm.com> Date: Fri, 9 Sep 2022 16:26:34 +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 19/28] mm: disallow do_swap_page to handle page faults under VMA lock 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> <20220901173516.702122-20-surenb@google.com> From: Laurent Dufour In-Reply-To: <20220901173516.702122-20-surenb@google.com> X-TM-AS-GCONF: 00 X-Proofpoint-ORIG-GUID: qXaBsnlFWkc8htuvnjQoZRrtArrrpv5u X-Proofpoint-GUID: l_-h7mrIGvq8aOTQrkDf7U1hncHr9B85 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 priorityscore=1501 impostorscore=0 malwarescore=0 spamscore=0 adultscore=0 mlxscore=0 suspectscore=0 bulkscore=0 lowpriorityscore=0 clxscore=1015 phishscore=0 mlxlogscore=906 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2207270000 definitions=main-2209090049 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20220909_072655_031278_71B381A1 X-CRM114-Status: GOOD ( 20.29 ) 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 RHVlIHRvIHRoZSBwb3NzaWJpbGl0eSBvZiBkb19zd2FwX3BhZ2UgZHJvcHBpbmcgbW1hcF9sb2Nr LCBhYm9ydCBmYXVsdAo+IGhhbmRsaW5nIHVuZGVyIFZNQSBsb2NrIGFuZCByZXRyeSBob2xkaW5n IG1tYXBfbG9jay4gVGhpcyBjYW4gYmUgaGFuZGxlZAo+IG1vcmUgZ3JhY2VmdWxseSBpbiB0aGUg ZnV0dXJlLgo+IAo+IFNpZ25lZC1vZmYtYnk6IFN1cmVuIEJhZ2hkYXNhcnlhbiA8c3VyZW5iQGdv b2dsZS5jb20+CgpSZXZpZXdlZC1ieTogTGF1cmVudCBEdWZvdXIgPGxhdXJlbnQuZHVmb3VyQGZy LmlibS5jb20+Cgo+IC0tLQo+ICBtbS9tZW1vcnkuYyB8IDUgKysrKysKPiAgMSBmaWxlIGNoYW5n ZWQsIDUgaW5zZXJ0aW9ucygrKQo+IAo+IGRpZmYgLS1naXQgYS9tbS9tZW1vcnkuYyBiL21tL21l bW9yeS5jCj4gaW5kZXggOWFjOTk0NGU4YzYyLi4yOWQyZjQ5ZjkyMmEgMTAwNjQ0Cj4gLS0tIGEv bW0vbWVtb3J5LmMKPiArKysgYi9tbS9tZW1vcnkuYwo+IEBAIC0zNzM4LDYgKzM3MzgsMTEgQEAg dm1fZmF1bHRfdCBkb19zd2FwX3BhZ2Uoc3RydWN0IHZtX2ZhdWx0ICp2bWYpCj4gIAl2bV9mYXVs dF90IHJldCA9IDA7Cj4gIAl2b2lkICpzaGFkb3cgPSBOVUxMOwo+ICAKPiArCWlmICh2bWYtPmZs YWdzICYgRkFVTFRfRkxBR19WTUFfTE9DSykgewo+ICsJCXJldCA9IFZNX0ZBVUxUX1JFVFJZOwo+ ICsJCWdvdG8gb3V0Owo+ICsJfQo+ICsKPiAgCWlmICghcHRlX3VubWFwX3NhbWUodm1mKSkKPiAg CQlnb3RvIG91dDsKPiAgCgoKX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19f X19fX19fX18KbGludXgtYXJtLWtlcm5lbCBtYWlsaW5nIGxpc3QKbGludXgtYXJtLWtlcm5lbEBs aXN0cy5pbmZyYWRlYWQub3JnCmh0dHA6Ly9saXN0cy5pbmZyYWRlYWQub3JnL21haWxtYW4vbGlz dGluZm8vbGludXgtYXJtLWtlcm5lbAo=