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Howlett" , Muhammad Usama Anjum , Peter Xu , Rich Felker , linux-mm@kvack.org, linux-kselftest@vger.kernel.org, LKML References: <20240614023009.221547-1-jhubbard@nvidia.com> <20240614023009.221547-7-jhubbard@nvidia.com> <76770ce2-f6a6-4af0-b29c-0070933a1dfb@nvidia.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: <76770ce2-f6a6-4af0-b29c-0070933a1dfb@nvidia.com> Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit X-Rspamd-Queue-Id: 3908920002 X-Stat-Signature: tfik9hzcmjbo3s344hk6hbn5kot84bk9 X-Rspam-User: X-Rspamd-Server: rspam10 X-HE-Tag: 1739458859-817168 X-HE-Meta: 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 1GDbwD80 smzS1owSdX9EbHRJYiqJnC9IG/YvVUhM58/FzrE/OYTGSaALMP/E5T7xYNnFydRjEorD6o4x+jmV/TCT0b1uHVtTsZv0xFH84izP7mD+QAz9zz6fYyThCeHZeTvQAlLmyuRwwbRGCoIH4N4kIFXrAGPhuPjrDy5dpcpwElI74a7FElc5K0oAWR5EWtcT+UgC45uIVSXbJIx9TSxgUSSq3GB/sV3ic0DqpvQAIHb4gVwEaNdASp8eBQqcHenzrJUrwG0vqhDqbEvaOdNsoIUjiYwl3QWGsR1eal6vBBCes39lMpls= 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 2/13/25 00:04, John Hubbard wrote: > > 2) I'm unable to reproduce what you saw, because in ALL cases (before > or after the commit, and with or without a revert), I get the same > results on my Intel test machine: > >     $ ./protection_keys_64 >     has pkeys: 0 >     running PKEY tests for unsupported CPU/OS > > ...so that's why I'm attaching a patch, in case you can verify that a > revert fixes it. The revert fixes it for me, thanks! You probably just have hardware without pkey support. This isn't 100% definitive, but you can check: cat /proc/cpuinfo | grep ospke If that doesn't match the "flags" line, then your hardware doesn't have support in the first place and the message is totally expected.