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Shutemov" , Thomas Gleixner , Ingo Molnar , Borislav Petkov , Dave Hansen , x86@kernel.org, "H. Peter Anvin" , Jonathan Corbet , Andy Lutomirski , Peter Zijlstra , Ard Biesheuvel , Jan Kiszka , Kieran Bingham , Michael Roth , Rick Edgecombe , Brijesh Singh , Sandipan Das , Juergen Gross , Tom Lendacky , linux-kernel@vger.kernel.org, linux-doc@vger.kernel.org, linux-efi@vger.kernel.org, linux-mm@kvack.org References: <20250516123306.3812286-1-kirill.shutemov@linux.intel.com> <20250516123306.3812286-3-kirill.shutemov@linux.intel.com> <30570ca0-8da4-4ebc-84d6-0a4badfb7154@intel.com> From: Dave Hansen Content-Language: en-US Autocrypt: addr=dave.hansen@intel.com; keydata= xsFNBE6HMP0BEADIMA3XYkQfF3dwHlj58Yjsc4E5y5G67cfbt8dvaUq2fx1lR0K9h1bOI6fC oAiUXvGAOxPDsB/P6UEOISPpLl5IuYsSwAeZGkdQ5g6m1xq7AlDJQZddhr/1DC/nMVa/2BoY 2UnKuZuSBu7lgOE193+7Uks3416N2hTkyKUSNkduyoZ9F5twiBhxPJwPtn/wnch6n5RsoXsb ygOEDxLEsSk/7eyFycjE+btUtAWZtx+HseyaGfqkZK0Z9bT1lsaHecmB203xShwCPT49Blxz VOab8668QpaEOdLGhtvrVYVK7x4skyT3nGWcgDCl5/Vp3TWA4K+IofwvXzX2ON/Mj7aQwf5W iC+3nWC7q0uxKwwsddJ0Nu+dpA/UORQWa1NiAftEoSpk5+nUUi0WE+5DRm0H+TXKBWMGNCFn c6+EKg5zQaa8KqymHcOrSXNPmzJuXvDQ8uj2J8XuzCZfK4uy1+YdIr0yyEMI7mdh4KX50LO1 pmowEqDh7dLShTOif/7UtQYrzYq9cPnjU2ZW4qd5Qz2joSGTG9eCXLz5PRe5SqHxv6ljk8mb ApNuY7bOXO/A7T2j5RwXIlcmssqIjBcxsRRoIbpCwWWGjkYjzYCjgsNFL6rt4OL11OUF37wL QcTl7fbCGv53KfKPdYD5hcbguLKi/aCccJK18ZwNjFhqr4MliQARAQABzUVEYXZpZCBDaHJp c3RvcGhlciBIYW5zZW4gKEludGVsIFdvcmsgQWRkcmVzcykgPGRhdmUuaGFuc2VuQGludGVs LmNvbT7CwXgEEwECACIFAlQ+9J0CGwMGCwkIBwMCBhUIAgkKCwQWAgMBAh4BAheAAAoJEGg1 lTBwyZKwLZUP/0dnbhDc229u2u6WtK1s1cSd9WsflGXGagkR6liJ4um3XCfYWDHvIdkHYC1t MNcVHFBwmQkawxsYvgO8kXT3SaFZe4ISfB4K4CL2qp4JO+nJdlFUbZI7cz/Td9z8nHjMcWYF IQuTsWOLs/LBMTs+ANumibtw6UkiGVD3dfHJAOPNApjVr+M0P/lVmTeP8w0uVcd2syiaU5jB aht9CYATn+ytFGWZnBEEQFnqcibIaOrmoBLu2b3fKJEd8Jp7NHDSIdrvrMjYynmc6sZKUqH2 I1qOevaa8jUg7wlLJAWGfIqnu85kkqrVOkbNbk4TPub7VOqA6qG5GCNEIv6ZY7HLYd/vAkVY E8Plzq/NwLAuOWxvGrOl7OPuwVeR4hBDfcrNb990MFPpjGgACzAZyjdmYoMu8j3/MAEW4P0z F5+EYJAOZ+z212y1pchNNauehORXgjrNKsZwxwKpPY9qb84E3O9KYpwfATsqOoQ6tTgr+1BR CCwP712H+E9U5HJ0iibN/CDZFVPL1bRerHziuwuQuvE0qWg0+0SChFe9oq0KAwEkVs6ZDMB2 P16MieEEQ6StQRlvy2YBv80L1TMl3T90Bo1UUn6ARXEpcbFE0/aORH/jEXcRteb+vuik5UGY 5TsyLYdPur3TXm7XDBdmmyQVJjnJKYK9AQxj95KlXLVO38lczsFNBFRjzmoBEACyAxbvUEhd GDGNg0JhDdezyTdN8C9BFsdxyTLnSH31NRiyp1QtuxvcqGZjb2trDVuCbIzRrgMZLVgo3upr MIOx1CXEgmn23Zhh0EpdVHM8IKx9Z7V0r+rrpRWFE8/wQZngKYVi49PGoZj50ZEifEJ5qn/H Nsp2+Y+bTUjDdgWMATg9DiFMyv8fvoqgNsNyrrZTnSgoLzdxr89FGHZCoSoAK8gfgFHuO54B lI8QOfPDG9WDPJ66HCodjTlBEr/Cwq6GruxS5i2Y33YVqxvFvDa1tUtl+iJ2SWKS9kCai2DR 3BwVONJEYSDQaven/EHMlY1q8Vln3lGPsS11vSUK3QcNJjmrgYxH5KsVsf6PNRj9mp8Z1kIG qjRx08+nnyStWC0gZH6NrYyS9rpqH3j+hA2WcI7De51L4Rv9pFwzp161mvtc6eC/GxaiUGuH BNAVP0PY0fqvIC68p3rLIAW3f97uv4ce2RSQ7LbsPsimOeCo/5vgS6YQsj83E+AipPr09Caj 0hloj+hFoqiticNpmsxdWKoOsV0PftcQvBCCYuhKbZV9s5hjt9qn8CE86A5g5KqDf83Fxqm/ vXKgHNFHE5zgXGZnrmaf6resQzbvJHO0Fb0CcIohzrpPaL3YepcLDoCCgElGMGQjdCcSQ+Ci FCRl0Bvyj1YZUql+ZkptgGjikQARAQABwsFfBBgBAgAJBQJUY85qAhsMAAoJEGg1lTBwyZKw l4IQAIKHs/9po4spZDFyfDjunimEhVHqlUt7ggR1Hsl/tkvTSze8pI1P6dGp2XW6AnH1iayn yRcoyT0ZJ+Zmm4xAH1zqKjWplzqdb/dO28qk0bPso8+1oPO8oDhLm1+tY+cOvufXkBTm+whm +AyNTjaCRt6aSMnA/QHVGSJ8grrTJCoACVNhnXg/R0g90g8iV8Q+IBZyDkG0tBThaDdw1B2l asInUTeb9EiVfL/Zjdg5VWiF9LL7iS+9hTeVdR09vThQ/DhVbCNxVk+DtyBHsjOKifrVsYep WpRGBIAu3bK8eXtyvrw1igWTNs2wazJ71+0z2jMzbclKAyRHKU9JdN6Hkkgr2nPb561yjcB8 sIq1pFXKyO+nKy6SZYxOvHxCcjk2fkw6UmPU6/j/nQlj2lfOAgNVKuDLothIxzi8pndB8Jju KktE5HJqUUMXePkAYIxEQ0mMc8Po7tuXdejgPMwgP7x65xtfEqI0RuzbUioFltsp1jUaRwQZ MTsCeQDdjpgHsj+P2ZDeEKCbma4m6Ez/YWs4+zDm1X8uZDkZcfQlD9NldbKDJEXLIjYWo1PH hYepSffIWPyvBMBTW2W5FRjJ4vLRrJSUoEfJuPQ3vW9Y73foyo/qFoURHO48AinGPZ7PC7TF vUaNOTjKedrqHkaOcqB185ahG2had0xnFsDPlx5y In-Reply-To: Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit X-Rspamd-Server: rspam04 X-Rspamd-Queue-Id: 14522140006 X-Stat-Signature: 4waw6pebs9i435fmub43z5p661wc8x6h X-Rspam-User: X-HE-Tag: 1747407587-542365 X-HE-Meta: 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 CIb9vxmA Ka57CmauM22GH5A4vTup3qdhUgD5UVmy3GyhA2puZjngvd3yM5Svh4artjZSannp5NxD/z9yMOcGFLYdneQKduiJ8jXfj37NoLtnGot7XkVZeoBgkZE0qJdaR9yfCKIKxXMVMvs9jYW+/xXQzpEi8WiOyFBEQnDonVvXMpJySqaYTyel2cQwxeJePubcrK80nugEKdlmlOqCwrrLz7MrTHP/k2nYIhvbuvivlSZjnPWd0DCW/AJxJo7bF1SHIU6dPd6kU 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 5/16/25 06:45, Ingo Molnar wrote: > Isn't it the other way around? MAX_PHYS{MEM,ADDR}_BITS are now *always* > dynamic, their value depending on whether LA57 is available and used. MAX_PHYS{MEM,ADDR}_BITS were always intended to be the compile-time maximums on the architecture. They're static on every architecture except x86 and some arm64 configs (who probably copied x86). That's why having them be dynamic broke non-vmemmap sparsemem. But we also seems to have defined MAXMEM to derive from MAX_PHYSMEM_BITS and MAXMEM cascades into a bunch of other stuff, including KASAN. So we can't just make them static again, I guess. The only option would be to make them static when using non-vmemmap sparsemem. But that's new-ish, and probably won't get any testing. I guess there's not much we can do about it.