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b=X5e8ZpsZLbl1lkwkUSHz7Tf88QvC6bbLgUb0WlvbV8et/FYJ4H4EgzEQwRz4EjfGq iiQ6b+KeNia1LA0IRIQv0sgfyHYrplp8zJYesEMrQasb8xlmDxIrZChArrvwzBd+W0 tCLNm28WBLHUweSj5QS5tw7tOKqP9LXwtcmS03VeL6jfF6MrKCNy7mizXcUyDZMnps ETedrbockt12Id1dC7+SSjrkgCOhVvbKcJccdTapksUZttEokY2I/+IWvtylw1iV4K p7Pjx7zKelUVjApXah61l272RsMqXn9zg3pAnwzPj6DPaKpxic92aTQ3louWhDjLak HtlddHSOT2YMg== Message-ID: <30372a67-8c94-4260-9496-dce900abd48e@kernel.org> Date: Thu, 8 Jan 2026 12:53:20 +0100 MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH v5 1/4] iommu: Add page_ext for IOMMU_DEBUG_PAGEALLOC To: Mostafa Saleh Cc: linux-mm@kvack.org, iommu@lists.linux.dev, linux-kernel@vger.kernel.org, linux-doc@vger.kernel.org, corbet@lwn.net, joro@8bytes.org, will@kernel.org, robin.murphy@arm.com, akpm@linux-foundation.org, vbabka@suse.cz, surenb@google.com, mhocko@suse.com, jackmanb@google.com, hannes@cmpxchg.org, ziy@nvidia.com, lorenzo.stoakes@oracle.com, Liam.Howlett@oracle.com, rppt@kernel.org, xiaqinxin@huawei.com, baolu.lu@linux.intel.com, rdunlap@infradead.org References: <20260106162200.2223655-1-smostafa@google.com> <20260106162200.2223655-2-smostafa@google.com> <1a6aedcd-34c2-4e26-b07e-6eb8d423b759@kernel.org> From: "David Hildenbrand (Red Hat)" Content-Language: en-US Autocrypt: addr=david@kernel.org; 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charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit X-Rspam-User: X-Rspamd-Server: rspam09 X-Rspamd-Queue-Id: E10B7140007 X-Stat-Signature: mhndi7cek7tusq4umxx7cnpi3jaaji3y X-HE-Tag: 1767873210-604553 X-HE-Meta: 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 HhT/gOoq XRejZnDo4dqEanZHDvyGRj+fMVMB/GatJXqmEyFrs8GUoT5cIF44GySeM2ja7sx6h/PjQKnJ52TMUBV8jkEBKFm6v3e2T/7fWECGGw/l1JCuVOhP0UXG4KgK9z8ChQ6sgJlfuTOF/t2px30qqHGXvQyrmAtK9EMW/tEIwRcxXdlhVWbLOFuJYNjQ9nhRu7/duTg2CV4OMclUHcTrm1wY4gXEI+z4Zbflf0EiM3JrjyFZ3e4A4+ClVJ4sC/xVq/u7OD/YXi7VSp40/TPq+FGM88veyBdNR2MDZ4d3Sms7ZVPgsA1riNAcBd7RsW6biQs2tED6kbbnh7q3k3b1OZyG0ZiK4JlNjOh4FgMU5NkYltXL6NLqwSIHzK0XIcBWbMYYm4fXK 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 1/8/26 11:42, Mostafa Saleh wrote: > On Wed, Jan 07, 2026 at 05:53:50PM +0100, David Hildenbrand (Red Hat) wrote: >> On 1/6/26 17:21, Mostafa Saleh wrote: >>> Add a new config IOMMU_DEBUG_PAGEALLOC, which registers new data to >>> page_ext. >>> >>> This config will be used by the IOMMU API to track pages mapped in >>> the IOMMU to catch drivers trying to free kernel memory that they >>> still map in their domains, causing all types of memory corruption. >>> >>> This behaviour is disabled by default and can be enabled using >>> kernel cmdline iommu.debug_pagealloc. >>> >>> Reviewed-by: Lu Baolu >>> Signed-off-by: Mostafa Saleh >>> --- >> >> I think I acked it, but maybe too late for you to spot it >> >> for the MM bits >> >> Acked-by: David Hildenbrand (Red Hat) > > Thanks! If my mail client is not acting, it seems that was the > same version(v5) also. Maybe my client is having problems :) -- Cheers David