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a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1768832824; bh=3DK5QC6r/ORsUFeMRQ3y1WSNFwVhnIsC3TsiYDomweg=; h=Date:Subject:To:Cc:References:From:In-Reply-To:From; b=N7OWZZ4ZT9xDMT32+wWxnFfbssR+lej35fUiE6pjuFwaEAf6Frz6ZF5Tzg81oRb9s YtY//5xSdkddrcZCOLXQKQ5yytZ9LoNKA+t2M76LkJvTFjG8ivJ4CXP8Vrjin7WgFq mm6eDv+4p8oxSEHap7HDOXiyZsiGk4yuaqNLYLmQTaA9ySxBQmwp0+eVyLzuVh4Pnd qcUiDFp38doWF4E9BOQB78Ro3PiuN115iOsR9yweUGyuvIEF7B9j8wc57gyhX31pTj /IGxKllmArfbkNOynUoUb/ClCXaZkrjA3P4gWd6bjxhTph+5kOoFS1kZPHZ7bIKX+L Z2liNTFBeNqBQ== Message-ID: Date: Mon, 19 Jan 2026 15:26:57 +0100 MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH 0/2] iommu: debug-pagealloc: Remove pfn_valid() usage To: Mostafa Saleh , linux-mm@kvack.org, iommu@lists.linux.dev, linux-kernel@vger.kernel.org, linux-doc@vger.kernel.org Cc: 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: <20260119142246.3821052-1-smostafa@google.com> 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-Stat-Signature: fe4se4nwq8btqaoa4fwhbk3radfio7nf X-Rspamd-Server: rspam09 X-Rspamd-Queue-Id: BB525C0003 X-HE-Tag: 1768832825-355113 X-HE-Meta: U2FsdGVkX19n3/w3wuo3I+qB9HmDtadVjxij/BwwFgsHH8nqkEcbcxWFkepBqYDtmNPEPXK0y9XLtfcfjG0wHPkyv7gSALuwZZ/fV1BMQffsnSbO0tEx2GhHAeLdaIUSI1A5MeYfdiP0k09tbuZO7HBUJf/grcIBEOT4aolpBEt4c4Tsq8go433Lk3uw/LSr/9aOCMxngquU/8kn8RLKy8a4w98gBN1xSaaP5Rj4wfpS0wvobJsioJaYpOSLeeYV32YrwHHJ4fqMSOJCGfWMkm93/H9RS11xRW9QRWePj77Df+CbuGuO+NktiWZOVTmK0Ip4NjjyG2DMZLe4FhI5KhtQwdZ15+b+UefyrpraXXNTj7R6+jPzqR890KXePdOapgrdJJUqHOR6LPDJDzbjFIV4qviXquHAFHZJi9KFFqfMbxg8U0Zi0votKh0J3XJfBL3eAMFXVfBuacczyh2iNoZMIm1vo2ZU3PE+wGRyIbuMqfDn4wUDUpCkO9DCUQwPDHdiqBMqKL+fBIquOmxPct+xUSXijdw+9wNtXcBYb1ucJnLUrS/+4gVDaOxEFDVye+2W4ituD85yXBHASpYeANZraoolDh1LH1G4akP++jL2L6SkNZfZC7N+elG926QySrSsPqJKkGBDQT56ABVMPzbE8T86s+PAtYFN671leC1uy3Osb47Fr+x7khZzfDUg9iLpOEC5LtrEHUOmvw0WgUuDKbLGZqeazCdTrL/jz7rRYR2z5lFnIGu8vjMEksVMN5FLwnuzsiD0DgZ+fmggmbs9g3V4OoDJkwe8tZMD8wFIEREMPFl4d4kUd/eKlRYeiSi/JEiBg8ht/bzrkuvacOvBhVkPFrMsQ7AWeyc33cAdmrGopRcZA/UK6Q6S7g2BJGclU4fWWvfILv5ec7Oy65nRm/IQxRFLBfuMut/LzHbaXnZvoxc3ZGwoFZe78d68uVSS5PmSmoZ6VAQ8g0E aUfDPTYg grJpX+8sFIcHEsGB/slIWG4J6pLxTM4BAf1k0s/gKXWTp78qd33iL9xfvUVsAXwfGLT7dsaciWNsqj0emnkYvis0ig8FXBN4XpH3imhrBpQuAq7hu9WIJsizFwNRwMTb1GRMVGV43lvD3UyXlv20dAcQEdJ5y41PFCp0s4NjrWbMVym6vo+WivFJKnoLjRvC4qxF3tBJqxW3bYhFiwo8/I+44GDvfUOzr661HsEFhENiLYm+YZ9Cpl6q1suWgbkfRtW6yEnRX/b8yEh23AxO23c/eOH/pOQaLTLlWHB/STlcXQvZbvCTKR6/Oy8n709vfuaN63gsne8UNpSHdml5rBKgctGnCrCvCUEnfP1gmdSBXhDxxOsZ4VCHzrDJRAN5gZKEB8RwS5BuG5BdmsZsrZErw5A== 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 1/19/26 15:22, Mostafa Saleh wrote: > This is a small fix for the new config IOMMU_DEBUG_PAGEALLOC based > on the discussion: > https://lore.kernel.org/linux-iommu/CAFgf54pBAUm3ao-UJksiuGKtvv4wzRyFq_uKwLe0H1ettO4DLQ@mail.gmail.com/ > > Where it was concluded that pfn_valid() is not enough to validate > physical addresses before access to page_ext. > > The first patch introduces a new function in page_ext that takes a > physical address as an argument, and the second patch uses it instead > of calling pfn_valid() and phys_to_page() > > Benchmarks with the new implementation can be found in: > https://lore.kernel.org/linux-iommu/20260114164322.787125-1-smostafa@google.com/ > > This series applies to iommu/core tree. This is part of v7 [1], right? Can't we just apply v7 instead or are the commit IDs already stable? [1] https://lkml.kernel.org/r/20260114164322.787125-1-smostafa@google.com -- Cheers David