From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-pj1-f54.google.com (mail-pj1-f54.google.com [209.85.216.54]) (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 BE54C305692 for ; Tue, 18 Aug 2026 03:43:00 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.216.54 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1787024581; cv=none; b=SL3hp2AKpjtDb0b2ik75KdG7gpTDCwG9igAFXZB4PlsXFlfSRAloyrKC/2stejSQInK7NClIAxYsrh1cz56ZsdfpO/4GSehPbmkHG8L1I6Pfwd3zv+87loThCS8OG0yp/LyFrxGO1UsMJWDQ+FBPdCEtaM7Aini3KQmMPPWun7U= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1787024581; c=relaxed/simple; bh=dRDoeNY2WfplCeM6Yc0GSWDWLkBmqI8DxH4apG0CyCA=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=M/b1DlbQpSH4pjVx/H3oMT9RBOIXnigMCs3cNvfqdAgWd5PQbTkICzJTOoQ+EYyqWXBDNRJ9E41uBqFJjnZV643kTyXo7mXwlMZNhO6mpiOCIwltlLHd/a+VJgYFKisDZCyjROaBy2sCm1f9ChEe2VYdlmj714JaljYZAyVSCD8= 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=RHk1GvpK; arc=none smtp.client-ip=209.85.216.54 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="RHk1GvpK" Received: by mail-pj1-f54.google.com with SMTP id 98e67ed59e1d1-38e88b60121so3163929a91.3 for ; Mon, 17 Aug 2026 20:43:00 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20251104; t=1787024580; x=1787629380; 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=dRDoeNY2WfplCeM6Yc0GSWDWLkBmqI8DxH4apG0CyCA=; b=RHk1GvpKptXQHkTagYAVVoqhFkYctcRFQa8vaLgLtIgQh73pMf1m5QAQrJE85Kztig 4qHwJSpdgXWmoJK5v03k5TfM46kRO4oPCmRgQYXx+7BfhFz+1ivdmYU3oB3qK1lvrK5L VZDQWDRqqSeMhrbRHFuv9XAGVzBKrwjTXkc1FqeOdUAnVfFQwTz4QRMuejL9q4hs9U/y njdGTfflSbV3WFgOrHc0OOA79YMk3FHtdq+swFhHd/8SUuoSC4uf9qbBUzKcTLE2Txd7 MKWQ1VYMXGOdoGZOEIfMB0lnGLwYDF4KloDXxu2X7gFCee5TKTzV8zTsUhQkg5mAAAD2 bcgw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20251104; t=1787024580; x=1787629380; 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=dRDoeNY2WfplCeM6Yc0GSWDWLkBmqI8DxH4apG0CyCA=; b=PMcWds4wJqMNkSB5jrtBrRK1H9o384R9sLM9EqvL1oxD0DIMDAEi24r/31nQqfYkvf 6ByPOGOFJzLYfzMHBV2sPXk3ipuqPrqmY7bx1zddCjHRHgAXzuquJP2164ASV3UOE50J 0DK2Q0bNeRmgFzNM3GMt2ecm0n84/Ru8WZdtF3Bke8W2nBsoHP6meRxxfdCsWfmpdSEW NswGGbH4l9IRyfOux3na79x6mzTRbfFJLI1P93XuR2JWT8jbDperJ2/uspdZbTDCRlEk 3FBNpaqWg0K38d0zn/3aIU14Q2SC1UtXoF0klSI2rGZ3dLLJcl3a85AsU2cxM0fmWgTt EMMg== X-Forwarded-Encrypted: i=1; AHgh+Rogm0iWjyp9Gf3piJ4+w0KM4xrXuMAk2JUNRIpPHwTqkXNuMjBHioWRIcmrxZhHdwkXyPuXefVELnUjc2+i8go=@vger.kernel.org X-Gm-Message-State: AOJu0YwXfTNzwgaKtjMyDBM769vTLfHf4JjxHLjOkRBi1xPvHBGRACWt bySSMLRbi0mSOsMZeMkJegjHlNqxYLy713FehSUePqtcH6pNQyOon39+ X-Gm-Gg: AR+sD13uz7hMRG3+RTWqmHCkx0F9gdyA6BzkWlL2sFejJ3COyuo0Mf2F1TRn0QUO0EH zAwgvdkWpPOvf+zCO+5TS+UUnHop/NDc7m1ZQeDefxAb9PV01AkFS8nyR3i++XJD7/ypDJenVtf pdWawIPzb8/+aC1eP3Cv0hH45cggKvnG+GoJ37gJ/Xt9Hme27MchU3og7vTz+ASzDhThXidWD39 xFw2D0E8fRjJ58hjfNPOroYA2HxxwvloNQC403srSRowls3N6rJvmpIEOwxYXEMnMcJ9BjexN+K DmzYsNKsOeTc6ZVYhscenASADR5X5go4sJM0DmOqPx8pbdjyAvrK2a98gtzP3L1yCC68DQJ0bXF IfjO3z5x3S27la5lZQohcyp53823Qi0hv4Hs2LNKsYCAk1+2Mus7VfVsh6kY3tisApLezUkjQBw Om7Nbi5jnFd8OhxjJuKsFH0EdWwWLM/uwuOH/bcZ7heVb8t0nyaB1QxoYCVVjD61FXKiVngn44 X-Received: by 2002:a17:90a:e18d:b0:380:7688:fbe9 with SMTP id 98e67ed59e1d1-3933b764d23mr33386383a91.8.1787024579941; Mon, 17 Aug 2026 20:42:59 -0700 (PDT) Received: from ancienth-X870E-Nova-WiFi ([125.186.72.2]) by smtp.gmail.com with ESMTPSA id 98e67ed59e1d1-3954d3b3b91sm4418656a91.13.2026.08.17.20.42.56 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 17 Aug 2026 20:42:59 -0700 (PDT) From: Daehyeon Ko <4ncienth@gmail.com> To: Andrew Morton Cc: Mike Rapoport , linux-mm@kvack.org, David Hildenbrand , Lorenzo Stoakes , "Liam R . Howlett" , Vlastimil Babka , Suren Baghdasaryan , Michal Hocko , Shuah Khan , linux-kselftest@vger.kernel.org, linux-kernel@vger.kernel.org Subject: Re: [PATCH] mm/secretmem: prevent uncharged mremap expansion after fork Date: Tue, 18 Aug 2026 12:42:12 +0900 Message-ID: <20260818034212.1761451-1-4ncienth@gmail.com> X-Mailer: git-send-email 2.54.0 In-Reply-To: <20260817154356.552ccde5d279f6e0a9ef0ff2@linux-foundation.org> References: <20260813225328.2010303-1-4ncienth@gmail.com> <20260817154356.552ccde5d279f6e0a9ef0ff2@linux-foundation.org> Precedence: bulk X-Mailing-List: linux-kselftest@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Thanks for the review. Yes, this patch was developed with AI assistance. I should have included the required Assisted-by trailer, and I apologize for the omission. The related issue is pertinent. Lorenzo's follow-up shows that the underlying problem is broader than the fork/mremap path: secretmem accounting follows the VMA lifetime, while the folios remain unevictable until inode eviction. My VM_DONTEXPAND approach only blocks one path and is not an appropriate fix. Please drop this patch. I will test Lorenzo's follow-up patch and report the results on that thread. Thanks, Daehyeon