From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 6CB783C1FFF; Thu, 8 Jan 2026 11:53:30 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1767873210; cv=none; b=r1OvhRHut1D8OCrBY5ja3JJjbzrCXSzrsuiBEFBef7dZPtOh9JZRKdeEqH5vbLZ7dwEzSJ4Nd3mRrOlDZ6gghoDUXLNiF7n2hTA7nZi+Z/ZSsLTbacyM3FqhXXmpUns4M7Yt+jspzBCFHFpxnUS0SqapGy3pa+MTOBxEnKcVpOY= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1767873210; c=relaxed/simple; bh=cemYfXaFY2WN3IjYrb/MiX/1d7RlDZPBC4WV8Eho1Lw=; h=Message-ID:Date:MIME-Version:Subject:To:Cc:References:From: In-Reply-To:Content-Type; b=nbhG2WuIcGcsh5NjK94kJZIISoyKsR8d/J2GrBx6EtXg1pQ1iG7QAucBcQnU1gMidPbkl/SxbYAODfa8cslaIU/bqKcJ4Zj1z4hEpRVRx1nyaM01uHBEqoCKRv/SRq7LWq+mX83cypNOIpMWqRyVYCGzOpEuvukgJmimkjccOtI= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=X5e8ZpsZ; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="X5e8ZpsZ" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 6870BC116C6; Thu, 8 Jan 2026 11:53:23 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1767873209; bh=cemYfXaFY2WN3IjYrb/MiX/1d7RlDZPBC4WV8Eho1Lw=; h=Date:Subject:To:Cc:References:From:In-Reply-To:From; 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 Precedence: bulk X-Mailing-List: linux-doc@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: 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 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