From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-pj1-f46.google.com (mail-pj1-f46.google.com [209.85.216.46]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 7DB3D38D6BD for ; Fri, 28 Aug 2026 05:27:26 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.216.46 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1787894847; cv=none; b=S6PSy1UguoU9xd1nT9SSmaRQNffBCHXUNhbZNAJKunlrMzzd4l2aQVQT9P1IcDuN2cmw6n3mlr7seMjYLPE7YmZjkEDgZUJtG1PbMLiqCefyAz8cNAyMEJM07RSsiECXNfGOanxNS0DiPpwe6jz0VDOI8m21bpnMu9BwhrsDRZs= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1787894847; c=relaxed/simple; bh=GkKJcJJo80VBzccp6OY4nXGqipd1Y9XAJQzIr04BHjs=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=KGsX74lx060LPjRy+Fe+yaG9c3JDEXbwhX2CU+sWPrCkt1e3QnHFO6L/VfFnv0jJ/YsxaRrqXSSLc0v0q4Xrc8kLex9Yu9hteK1nFR7fH3FIBCmOUr2lpPOtk17Z0ca3H2QJz0qBAvlVaCFBP1pMfYsiNXXVgLI7BFm5k8iudZc= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=gmail.com; spf=pass smtp.mailfrom=gmail.com; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b=ooJVkiFD; arc=none smtp.client-ip=209.85.216.46 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=gmail.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=gmail.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b="ooJVkiFD" Received: by mail-pj1-f46.google.com with SMTP id 98e67ed59e1d1-38e42560ebcso740465a91.1 for ; Thu, 27 Aug 2026 22:27:26 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20251104; t=1787894846; x=1788499646; darn=vger.kernel.org; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:from:to:cc:subject:date :message-id:reply-to:content-type; bh=GkKJcJJo80VBzccp6OY4nXGqipd1Y9XAJQzIr04BHjs=; b=ooJVkiFD0p4spP2v7Rgje0xm5FLjijn3aMEPYgO9ofBXEcuPJ8SI/9DGvRs/2tiZkc ehoQU//fmzD6d/XUym1RoguUOgyk9OWhjVL8MxofrQcYO6c0OxWZBi7zZPTVvLKspBSg 3QVwtQSB13NvXwBZuFCVQGO6mkofM4JB3mSJcEIzdez+uOdgjZKNtba6n9nWzPtbqdot TZhRaAO4S/z1gnFhUCWKMbVVe66sCxD3aecFfItquXAjszLk9/DVa79k8SBaTVNdbkHd zYU9UQNYb24rkbYv+Y9CKgUPLOja34O1e25kYz9imUEaNIjkPVbb1tHefaibKmHYykkl zOXA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20251104; t=1787894846; x=1788499646; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:x-gm-gg:x-gm-message-state:from :to:cc:subject:date:message-id:reply-to:content-type; bh=GkKJcJJo80VBzccp6OY4nXGqipd1Y9XAJQzIr04BHjs=; b=n0VWnElfJB4RHlAcot/AYVt8JX+rnGVxBhUla+fBisrulMegnSG4u14fHyg6Dpeg4m biuNRyV3UZtupPh5QQuE42uS1hzaGuMxKNG6Y0njwBPmG0gCdmGYgeV2ZdFMlRsunGDT cbApMl6xyorG1h4xd+bwINU+35CZE/5pFiQz0mZYbbs5syNbgs6Ip06YH5XHi3X2BK7I bbkzEG3V6yyL3n84q76ankfzjv26R6Xolzq5PDOuOALmkdeDcN8y1Pam7Xg/SRtJ0gRS LBM9Bk33jcNX1mIeJMttCS09OUFXReVDAwYhWujVP3w4KRCOkR2BBrP8rKyHo2CV35Zg BNhQ== X-Forwarded-Encrypted: i=1; AHgh+Rqj1m5FX4aq57HqvM9Z9Zn/jI3mEwfiCIWZizA5+p2xRdltdmdQda/sN2y4EHO0s0avqMm2L6Qo@vger.kernel.org X-Gm-Message-State: AFuF++lHaw9ceI7u3kNyDMQl2x9hgIl9tV5owDmVoI7JcpgA/2xkpFf7 Qp7/7L9W8OLDMnEQWDniiW0vvNb4U4a04AMp0P1uDslzCldnrOuVm15D X-Gm-Gg: AR+sD116VkxzXq8Ju/OEORuAZBC/DzpHzXOm2Oh8Kw055QI58d+GjUr+D/YLFkHr5lv VNvWJEqkdwibvRsTtxI73a5Caba/emT57yrGC6sntTsi5TE6WxNHBhV0chAAH4ClfItzs9Cd9JU xmSqbtxd5rXAsm6njkSZ9yRpjTGDG4YJcjC2hqngkXyciXtkD2bZTMvlrVg9N39wqNw3Rflh8fx gRs6zu3bDLQti21N2tB65w6p3ZkTJcnVEsFwFzvr7O/SEYiWkR2fQIvMJmqqJ8n2axRM6GzCKUP fiPYz+fE2hBDbhcziUQscbLu7h6KkiA5z/GjlaiUJGtCkDpCWjSowK8ZSzQGzuU06nQ+eZrzdcn M0XBumSl3+ZPDPINziLsmHSrZjQ7k2Y7zOdsutMpCRGiIue/6g3vTwRYgRYsLZ/Zw/EBMj6sePO Fd/ZSHrkmKzLSlCh71A32cAdEkvYC5oYmzsJWkl/PXlQL1QVLivq+ZC40cbK2frIEkqxpC7ccjX YflMNvJUa8yHGbZJS42Brecs1P/x49mZCxIDYE= X-Received: by 2002:a17:90b:3ec1:b0:38e:7168:281 with SMTP id 98e67ed59e1d1-396d0f2dcd8mr6758572a91.10.1787894845803; Thu, 27 Aug 2026 22:27:25 -0700 (PDT) Received: from localhost.localdomain (vmi2317720.contaboserver.net. [84.247.152.65]) by smtp.gmail.com with ESMTPSA id 98e67ed59e1d1-396ddc555b0sm977985a91.13.2026.08.27.22.27.14 (version=TLS1_3 cipher=TLS_CHACHA20_POLY1305_SHA256 bits=256/256); Thu, 27 Aug 2026 22:27:25 -0700 (PDT) From: Lian Wang To: Kairui Song via B4 Relay Cc: linux-mm@kvack.org, Andrew Morton , Barry Song , Axel Rasmussen , Yuanchu Xie , Wei Xu , Baoquan He , Shakeel Butt , Johannes Weiner , Michal Hocko , Roman Gushchin , Muchun Song , Chris Li , Baolin Wang , Ridong Chen , David Hildenbrand , Lorenzo Stoakes , "Liam R. Howlett" , Vlastimil Babka , Yu Zhao , Zi Yan , Qi Zheng , cgroups@vger.kernel.org, linux-kernel@vger.kernel.org, Kairui Song , Kairui Song Subject: Re: [PATCH v3 3/6] mm/migrate: copy all referenced state via folio_migrate_lru_refs Date: Fri, 28 Aug 2026 13:26:32 +0800 Message-ID: <20260828052702.52673-1-lianux.mm@gmail.com> X-Mailer: git-send-email 2.55.0 In-Reply-To: <20260826-mglru-flags-cleanup-v3-3-d9f1c75549c8@tencent.com> References: <20260826-mglru-flags-cleanup-v3-0-d9f1c75549c8@tencent.com> <20260826-mglru-flags-cleanup-v3-3-d9f1c75549c8@tencent.com> Precedence: bulk X-Mailing-List: cgroups@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit > Transfer the reference state first, before the destination folio is > marked uptodate, so a concurrent lockless reader cannot have its > reference update overwritten by the copy. Reviewed-by: Lian Wang