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X-CSE-ConnectionGUID: Gt2hKC2nQZCiEZ7cegQ6Ng== X-CSE-MsgGUID: cRVwvffzSHacBX3Ck1my7g== X-IronPort-AV: E=McAfee;i="6800,10657,11564"; a="61085304" X-IronPort-AV: E=Sophos;i="6.18,293,1751266800"; d="scan'208";a="61085304" Received: from orviesa006.jf.intel.com ([10.64.159.146]) by fmvoesa111.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 25 Sep 2025 13:24:13 -0700 X-CSE-ConnectionGUID: 6gr1JL/yQKiAf+2CVcC66A== X-CSE-MsgGUID: 4LgWa1IfS9mUPDKobq41Jg== X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="6.18,293,1751266800"; d="scan'208";a="176557599" Received: from ray2.jf.intel.com (HELO [10.24.81.144]) ([10.24.81.144]) by orviesa006-auth.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 25 Sep 2025 13:24:12 -0700 Message-ID: Date: Thu, 25 Sep 2025 13:24:12 -0700 MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH v5 0/8] Fix stale IOTLB entries for kernel address space To: Lu Baolu , Joerg Roedel , Will Deacon , Robin Murphy , Kevin Tian , Jason Gunthorpe , Jann Horn , Vasant Hegde , Thomas Gleixner , Ingo Molnar , Borislav Petkov , Alistair Popple , Peter Zijlstra , Uladzislau Rezki , Jean-Philippe Brucker , Andy Lutomirski , Yi Lai Cc: iommu@lists.linux.dev, security@kernel.org, x86@kernel.org, linux-mm@kvack.org, linux-kernel@vger.kernel.org References: <20250919054007.472493-1-baolu.lu@linux.intel.com> Content-Language: en-US From: Dave Hansen Autocrypt: addr=dave.hansen@intel.com; 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charset=UTF-8 Content-Transfer-Encoding: 7bit X-Rspamd-Queue-Id: 4451A8000A X-Rspam-User: X-Rspamd-Server: rspam07 X-Stat-Signature: ighpchixsppzu1x1oz4ed859iewosmew X-HE-Tag: 1758831854-623201 X-HE-Meta: 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 cofYQ/CB HHpjtr6DR1/9OxJE8hNkBvVQoAhP88Tv6RnAdzinzvn3mQdK8sHbqOSdOL3NWtOqPiooCWcTu7JF0MXG+wHgcHH1gvlmOUZXdn/yEUoAwKRper3BmLKgDfu0eJlGsp/ImBxzYZtBc6MGS/63naU2ZTn6Jo9diQPUFRm3IJgoo6DyLhq/9INrOrdA6Qf003axZLERNPzNrhRnMw5Y= X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: On 9/18/25 22:39, Lu Baolu wrote: > This solution introduces a deferred freeing mechanism for kernel page > table pages, which provides a safe window to notify the IOMMU to > invalidate its caches before the page is reused. I think all the activity has died down and I everyone seems happy enough with how this looks. Right? So is this something we should prod Andrew to take through the mm tree, or is it x86-specific enough it should go through tip?