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 B89DEE77188 for ; Tue, 14 Jan 2025 07:52:53 +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-Type: Content-Transfer-Encoding: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=xRKXYto9AxE5ZaxBlufa0AJCI7O4+HJEUp7jcOxSMNQ=; b=i+PKYI0K9D9jaj Gm+hf2EZ2TRTwXb5TeK+0bL0RZDgWB/o6Vh9tf+piSunRWFtYVEugvrYdx+iR6vCng5TDvc8mKVzP Jx8YylR6Y5bB3SoUO1zRZwygPFQ5vePuKa54LwOrb4otBxQV1VLP/fCp+p3mJBH3RYxPKBzQV0l4/ Av3JOLdxXHrnPIUmNW9nMAd+nT/L4Q8hM4KSSDGHMa2iF3nlZk0ivIRIrkgcMHDutb3zzaLUMl487 sJ8zdNIT1ElMCKnEILcn6mF9/q+k60Ddbxi9fomSU7WcQCHVaUIq8XicFp3qtuMVv4pcLqSPW1dta lSjUz8bhpLsS0/QmZ9UA==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.98 #2 (Red Hat Linux)) id 1tXbjD-00000007jrL-2sZY; Tue, 14 Jan 2025 07:52:47 +0000 Received: from out30-112.freemail.mail.aliyun.com ([115.124.30.112]) by bombadil.infradead.org with esmtps (Exim 4.98 #2 (Red Hat Linux)) id 1tXbhx-00000007jiT-21QK; Tue, 14 Jan 2025 07:51:31 +0000 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linux.alibaba.com; s=default; t=1736841084; h=Message-ID:Date:MIME-Version:Subject:To:From:Content-Type; bh=+6aBypYiXpsnIYYHDG4FFvYm+u76PpmDT44lIRDZKQU=; b=PWw61iIBMXUk4YvB3euwT8EQAS8iRj8xwdOPVj9H7Pvlxi+oEERO1nxPhyM+UV8tWNvPGGjtTaEI4AkIy6nCj+zvIxEA6dF7OQrjALsmajtQuzQusZJJrJ7Yepk71G1exL/3D+3hjWhahd6E1oUUpFIeNRj22+TKLw4Re3U/bfk= Received: from 30.74.144.113(mailfrom:baolin.wang@linux.alibaba.com fp:SMTPD_---0WNeTLfB_1736841079 cluster:ay36) by smtp.aliyun-inc.com; Tue, 14 Jan 2025 15:51:20 +0800 Message-ID: Date: Tue, 14 Jan 2025 15:51:19 +0800 MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH v2 4/4] mm: Avoid splitting pmd for lazyfree pmd-mapped THP in try_to_unmap To: Barry Song <21cnbao@gmail.com> Cc: akpm@linux-foundation.org, chrisl@kernel.org, david@redhat.com, ioworker0@gmail.com, kasong@tencent.com, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, linux-mm@kvack.org, linux-riscv@lists.infradead.org, lorenzo.stoakes@oracle.com, ryan.roberts@arm.com, v-songbaohua@oppo.com, x86@kernel.org, ying.huang@intel.com, zhengtangquan@oppo.com References: <20250114040914.9986-1-21cnbao@gmail.com> <20250114060059.14058-1-21cnbao@gmail.com> From: Baolin Wang In-Reply-To: <20250114060059.14058-1-21cnbao@gmail.com> X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20250113_235129_684536_AB9C5DBC X-CRM114-Status: GOOD ( 12.37 ) X-BeenThere: linux-riscv@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Transfer-Encoding: base64 Content-Type: text/plain; charset="utf-8"; Format="flowed" Sender: "linux-riscv" Errors-To: linux-riscv-bounces+linux-riscv=archiver.kernel.org@lists.infradead.org CgpPbiAyMDI1LzEvMTQgMTQ6MDAsIEJhcnJ5IFNvbmcgd3JvdGU6Cj4+Pj4gIMKgIMKgIMKgIMKg IMKgIMKgIMKgIGlmICghcHZtdy5wdGUpIHsKPj4+PiArIMKgIMKgIMKgIMKgIMKgIMKgIMKgIMKg IMKgIMKgIGxhenlmcmVlID0gZm9saW9fdGVzdF9hbm9uKGZvbGlvKSAmJiAhZm9saW9fdGVzdF9z d2FwYmFja2VkKGZvbGlvKTsKPj4+Cj4+PiBZb3UndmUgY2hlY2tlZCBsYXp5ZnJlZSBoZXJlLCBz byBjYW4gd2UgcmVtb3ZlIHRoZSBkdXBsaWNhdGUgY2hlY2sgaW4KPj4+IHVubWFwX2h1Z2VfcG1k X2xvY2tlZCgpPyBUaGVuIHRoZSBjb2RlIHNob3VsZCBiZToKPj4+Cj4+PiAgwqAgwqAgwqAgwqAg wqAgwqAgwqAgwqAgaWYgKGxhenlmcmVlICYmIHVubWFwX2h1Z2VfcG1kX2xvY2tlZCguLi4pKQo+ Pj4gIMKgIMKgIMKgIMKgIMKgIMKgIMKgIMKgIMKgIMKgIMKgIMKgIGdvdG8gd2Fsa19kb25lOwo+ Pgo+Pgo+PiByaWdodC4gaXQgc2VlbXMgdW5tYXBfaHVnZV9wbWRfbG9ja2VkKCkgb25seSBoYW5k bGVzIGxhenlmcmVlIHBtZC1tYXBwZWQKPj4gdGhwLiBzbyBpIGd1ZXNzIHRoZSBjb2RlIGNvdWxk IGJlOgo+Pgo+PiBkaWZmIC0tZ2l0IGEvbW0vaHVnZV9tZW1vcnkuYyBiL21tL2h1Z2VfbWVtb3J5 LmMKPj4gaW5kZXggYWVhNDlmNzEyNWYxLi5jNGMzYTc4OTZkZTQgMTAwNjQ0Cj4+IC0tLSBhL21t L2h1Z2VfbWVtb3J5LmMKPj4gKysrIGIvbW0vaHVnZV9tZW1vcnkuYwo+PiBAQCAtMzEzMSwxMSAr MzEzMSwxMCBAQCBib29sIHVubWFwX2h1Z2VfcG1kX2xvY2tlZChzdHJ1Y3Qgdm1fYXJlYV9zdHJ1 Y3QgKnZtYSwgdW5zaWduZWQgbG9uZyBhZGRyLAo+PiAgwqAgwqAgwqAgwqAgVk1fV0FSTl9PTl9G T0xJTyghZm9saW9fdGVzdF9wbWRfbWFwcGFibGUoZm9saW8pLCBmb2xpbyk7Cj4+ICDCoCDCoCDC oCDCoCBWTV9XQVJOX09OX0ZPTElPKCFmb2xpb190ZXN0X2xvY2tlZChmb2xpbyksIGZvbGlvKTsK Pj4gIMKgIMKgIMKgIMKgIFZNX1dBUk5fT05fT05DRSghSVNfQUxJR05FRChhZGRyLCBIUEFHRV9Q TURfU0laRSkpOwo+PiArIMKgIMKgIMKgIFZNX1dBUk5fT05fRk9MSU8oIWZvbGlvX3Rlc3RfYW5v bihmb2xpbyksIGZvbGlvKTsKPj4gKyDCoCDCoCDCoCBWTV9XQVJOX09OX0ZPTElPKGZvbGlvX3Rl c3Rfc3dhcGJhY2tlZChmb2xpbyksIGZvbGlvKTsKPj4KPj4gLSDCoCDCoCDCoCBpZiAoZm9saW9f dGVzdF9hbm9uKGZvbGlvKSAmJiAhZm9saW9fdGVzdF9zd2FwYmFja2VkKGZvbGlvKSkKPj4gLSDC oCDCoCDCoCDCoCDCoCDCoCDCoCByZXR1cm4gX19kaXNjYXJkX2Fub25fZm9saW9fcG1kX2xvY2tl ZCh2bWEsIGFkZHIsIHBtZHAsIGZvbGlvKTsKPj4gLQo+PiAtIMKgIMKgIMKgIHJldHVybiBmYWxz ZTsKPj4gKyDCoCDCoCDCoCByZXR1cm4gX19kaXNjYXJkX2Fub25fZm9saW9fcG1kX2xvY2tlZCh2 bWEsIGFkZHIsIHBtZHAsIGZvbGlvKTsKPj4gIMKgfQo+Pgo+PiAgwqBzdGF0aWMgdm9pZCByZW1h cF9wYWdlKHN0cnVjdCBmb2xpbyAqZm9saW8sIHVuc2lnbmVkIGxvbmcgbnIsIGludCBmbGFncykK Pj4gZGlmZiAtLWdpdCBhL21tL3JtYXAuYyBiL21tL3JtYXAuYwo+PiBpbmRleCAwMmM0ZTRiMmNk N2IuLjcyOTA3ZWIxYjhmZSAxMDA2NDQKPj4gLS0tIGEvbW0vcm1hcC5jCj4+ICsrKyBiL21tL3Jt YXAuYwo+PiBAQCAtMTY3MSw3ICsxNjcxLDcgQEAgc3RhdGljIGJvb2wgdHJ5X3RvX3VubWFwX29u ZShzdHJ1Y3QgZm9saW8gKmZvbGlvLCBzdHJ1Y3Qgdm1fYXJlYV9zdHJ1Y3QgKnZtYSwKPj4gIMKg IMKgIMKgIMKgIERFRklORV9GT0xJT19WTUFfV0FMSyhwdm13LCBmb2xpbywgdm1hLCBhZGRyZXNz LCAwKTsKPj4gIMKgIMKgIMKgIMKgIHB0ZV90IHB0ZXZhbDsKPj4gIMKgIMKgIMKgIMKgIHN0cnVj dCBwYWdlICpzdWJwYWdlOwo+PiAtIMKgIMKgIMKgIGJvb2wgYW5vbl9leGNsdXNpdmUsIGxhenlm cmVlLCByZXQgPSB0cnVlOwo+PiArIMKgIMKgIMKgIGJvb2wgYW5vbl9leGNsdXNpdmUsIHJldCA9 IHRydWU7Cj4+ICDCoCDCoCDCoCDCoCBzdHJ1Y3QgbW11X25vdGlmaWVyX3JhbmdlIHJhbmdlOwo+ PiAgwqAgwqAgwqAgwqAgZW51bSB0dHVfZmxhZ3MgZmxhZ3MgPSAoZW51bSB0dHVfZmxhZ3MpKGxv bmcpYXJnOwo+PiAgwqAgwqAgwqAgwqAgaW50IG5yX3BhZ2VzID0gMTsKPj4gQEAgLTE3MjQsMTgg KzE3MjQsMTYgQEAgc3RhdGljIGJvb2wgdHJ5X3RvX3VubWFwX29uZShzdHJ1Y3QgZm9saW8gKmZv bGlvLCBzdHJ1Y3Qgdm1fYXJlYV9zdHJ1Y3QgKnZtYSwKPj4gIMKgIMKgIMKgIMKgIMKgIMKgIMKg IMKgIH0KPj4KPj4gIMKgIMKgIMKgIMKgIMKgIMKgIMKgIMKgIGlmICghcHZtdy5wdGUpIHsKPj4g LSDCoCDCoCDCoCDCoCDCoCDCoCDCoCDCoCDCoCDCoCDCoCBsYXp5ZnJlZSA9IGZvbGlvX3Rlc3Rf YW5vbihmb2xpbykgJiYgIWZvbGlvX3Rlc3Rfc3dhcGJhY2tlZChmb2xpbyk7Cj4+IC0KPj4gLSDC oCDCoCDCoCDCoCDCoCDCoCDCoCDCoCDCoCDCoCDCoCBpZiAodW5tYXBfaHVnZV9wbWRfbG9ja2Vk KHZtYSwgcHZtdy5hZGRyZXNzLCBwdm13LnBtZCwKPj4gLSDCoCDCoCDCoCDCoCDCoCDCoCDCoCDC oCDCoCDCoCDCoCDCoCDCoCDCoCDCoCDCoCDCoCDCoCDCoCDCoCDCoCDCoCDCoCDCoCBmb2xpbykp Cj4+IC0gwqAgwqAgwqAgwqAgwqAgwqAgwqAgwqAgwqAgwqAgwqAgwqAgwqAgwqAgwqAgZ290byB3 YWxrX2RvbmU7Cj4+IC0gwqAgwqAgwqAgwqAgwqAgwqAgwqAgwqAgwqAgwqAgwqAgLyoKPj4gLSDC oCDCoCDCoCDCoCDCoCDCoCDCoCDCoCDCoCDCoCDCoCDCoCogdW5tYXBfaHVnZV9wbWRfbG9ja2Vk IGhhcyBlaXRoZXIgYWxyZWFkeSBtYXJrZWQKPj4gLSDCoCDCoCDCoCDCoCDCoCDCoCDCoCDCoCDC oCDCoCDCoCDCoCogdGhlIGZvbGlvIGFzIHN3YXAtYmFja2VkIG9yIGRlY2lkZWQgdG8gcmV0YWlu IGl0Cj4+IC0gwqAgwqAgwqAgwqAgwqAgwqAgwqAgwqAgwqAgwqAgwqAgwqAqIGR1ZSB0byBHVVAg b3Igc3BlY3VsYXRpdmUgcmVmZXJlbmNlcy4KPj4gLSDCoCDCoCDCoCDCoCDCoCDCoCDCoCDCoCDC oCDCoCDCoCDCoCovCj4+IC0gwqAgwqAgwqAgwqAgwqAgwqAgwqAgwqAgwqAgwqAgwqAgaWYgKGxh enlmcmVlKQo+PiArIMKgIMKgIMKgIMKgIMKgIMKgIMKgIMKgIMKgIMKgIMKgIGlmIChmb2xpb190 ZXN0X2Fub24oZm9saW8pICYmICFmb2xpb190ZXN0X3N3YXBiYWNrZWQoZm9saW8pKSB7Cj4+ICsg wqAgwqAgwqAgwqAgwqAgwqAgwqAgwqAgwqAgwqAgwqAgwqAgwqAgwqAgwqAgaWYgKHVubWFwX2h1 Z2VfcG1kX2xvY2tlZCh2bWEsIHB2bXcuYWRkcmVzcywgcHZtdy5wbWQsIGZvbGlvKSkKPj4gKyDC oCDCoCDCoCDCoCDCoCDCoCDCoCDCoCDCoCDCoCDCoCDCoCDCoCDCoCDCoCDCoCDCoCDCoCDCoCBn b3RvIHdhbGtfZG9uZTsKPj4gKyDCoCDCoCDCoCDCoCDCoCDCoCDCoCDCoCDCoCDCoCDCoCDCoCDC oCDCoCDCoCAvKgo+PiArIMKgIMKgIMKgIMKgIMKgIMKgIMKgIMKgIMKgIMKgIMKgIMKgIMKgIMKg IMKgIMKgKiB1bm1hcF9odWdlX3BtZF9sb2NrZWQgaGFzIGVpdGhlciBhbHJlYWR5IG1hcmtlZAo+ PiArIMKgIMKgIMKgIMKgIMKgIMKgIMKgIMKgIMKgIMKgIMKgIMKgIMKgIMKgIMKgIMKgKiB0aGUg Zm9saW8gYXMgc3dhcC1iYWNrZWQgb3IgZGVjaWRlZCB0byByZXRhaW4gaXQKPj4gKyDCoCDCoCDC oCDCoCDCoCDCoCDCoCDCoCDCoCDCoCDCoCDCoCDCoCDCoCDCoCDCoCogZHVlIHRvIEdVUCBvciBz cGVjdWxhdGl2ZSByZWZlcmVuY2VzLgo+PiArIMKgIMKgIMKgIMKgIMKgIMKgIMKgIMKgIMKgIMKg IMKgIMKgIMKgIMKgIMKgIMKgKi8KPj4gIMKgIMKgIMKgIMKgIMKgIMKgIMKgIMKgIMKgIMKgIMKg IMKgIMKgIMKgIMKgIMKgIGdvdG8gd2Fsa19hYm9ydDsKPj4gKyDCoCDCoCDCoCDCoCDCoCDCoCDC oCDCoCDCoCDCoCDCoCB9Cj4+Cj4+ICDCoCDCoCDCoCDCoCDCoCDCoCDCoCDCoCDCoCDCoCDCoCDC oCBpZiAoZmxhZ3MgJiBUVFVfU1BMSVRfSFVHRV9QTUQpIHsKPj4gIMKgIMKgIMKgIMKgIMKgIMKg IMKgIMKgIMKgIMKgIMKgIMKgIMKgIMKgIMKgIMKgIC8qCj4+Cj4+Pgo+Pj4+ICDCoCDCoCDCoCDC oCDCoCDCoCDCoCDCoCDCoCDCoCDCoCBpZiAodW5tYXBfaHVnZV9wbWRfbG9ja2VkKHZtYSwgcHZt dy5hZGRyZXNzLCBwdm13LnBtZCwKPj4+PiAgwqAgwqAgwqAgwqAgwqAgwqAgwqAgwqAgwqAgwqAg wqAgwqAgwqAgwqAgwqAgwqAgwqAgwqAgwqAgwqAgwqAgwqAgwqAgwqAgZm9saW8pKQo+Pj4+ICDC oCDCoCDCoCDCoCDCoCDCoCDCoCDCoCDCoCDCoCDCoCDCoCDCoCDCoCDCoCBnb3RvIHdhbGtfZG9u ZTsKPj4+PiArIMKgIMKgIMKgIMKgIMKgIMKgIMKgIMKgIMKgIMKgIC8qCj4+Pj4gKyDCoCDCoCDC oCDCoCDCoCDCoCDCoCDCoCDCoCDCoCDCoCogdW5tYXBfaHVnZV9wbWRfbG9ja2VkIGhhcyBlaXRo ZXIgYWxyZWFkeSBtYXJrZWQKPj4+PiArIMKgIMKgIMKgIMKgIMKgIMKgIMKgIMKgIMKgIMKgIMKg KiB0aGUgZm9saW8gYXMgc3dhcC1iYWNrZWQgb3IgZGVjaWRlZCB0byByZXRhaW4gaXQKPj4+PiAr IMKgIMKgIMKgIMKgIMKgIMKgIMKgIMKgIMKgIMKgIMKgKiBkdWUgdG8gR1VQIG9yIHNwZWN1bGF0 aXZlIHJlZmVyZW5jZXMuCj4+Pj4gKyDCoCDCoCDCoCDCoCDCoCDCoCDCoCDCoCDCoCDCoCDCoCov Cj4+Pj4gKyDCoCDCoCDCoCDCoCDCoCDCoCDCoCDCoCDCoCDCoCBpZiAobGF6eWZyZWUpCj4+Pj4g KyDCoCDCoCDCoCDCoCDCoCDCoCDCoCDCoCDCoCDCoCDCoCDCoCDCoCDCoCBnb3RvIHdhbGtfYWJv cnQ7Cj4+Pj4KPj4+PiAgwqAgwqAgwqAgwqAgwqAgwqAgwqAgwqAgwqAgwqAgwqAgaWYgKGZsYWdz ICYgVFRVX1NQTElUX0hVR0VfUE1EKSB7Cj4+Pj4gIMKgIMKgIMKgIMKgIMKgIMKgIMKgIMKgIMKg IMKgIMKgIMKgIMKgIMKgIMKgIC8qCj4gCj4gCj4gCj4gVGhlIGZpbmFsIGRpZmYgaXMgYXMgZm9s bG93cy4KPiBCYW9saW4sIGRvIHlvdSBoYXZlIGFueSBhZGRpdGlvbmFsIGNvbW1lbnRzIGJlZm9y ZSBJIHNlbmQgb3V0IHYzPwoKTm8gb3RoZXIgY29tbWVudHMuIExvb2sgZ29vZCB0byBtZS4KCl9f X19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fCmxpbnV4LXJpc2N2 IG1haWxpbmcgbGlzdApsaW51eC1yaXNjdkBsaXN0cy5pbmZyYWRlYWQub3JnCmh0dHA6Ly9saXN0 cy5pbmZyYWRlYWQub3JnL21haWxtYW4vbGlzdGluZm8vbGludXgtcmlzY3YK