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FxMhWuYJnxz93MY5LbdUkFMogIooye6ZG3mG92zEFICNFQbQe39cfbZpU/8/ldEtvWEKmR5jsFTLBp2CjxXoQa5BLS29O1W/ypqo5t9CCTb6+mBmMYKV4N7cEEdBsF+pwlwjRzx3yghf7/kGcsJcB2MaQOiEAU+oGn7G1DUiAkbEY604VF8KB/BUgDOrpBG8VoZkRkS0F31kiArvIhMdr18Ys21miYf4sfWKjC0sfPApukQteckHRk7WoO4pVzvhYChhGE+ZE1lqWSmhFzYI0LaA6CAhqfuG02lf1uTfiLS407ldVX3Dgbe5VCog3CsQkLOtr8S2rVzGbbRtZzvrJXdQxU+qDSRBOaCMQFESG6MbibRA8ZYpzzS5oEpwCpZMxkMXJy6eOt2f7eRTImgmEQr3laS0Td3yqfjL3Lnakt/5yKK6imeVdpGiCSq0+cELBiecf7UQlJUQG9K/rr0r0xtzQfjivARCTzEnm 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 22-Apr-25 12:44 PM, Balbir Singh wrote: > On 4/22/25 16:34, Bharata B Rao wrote: > > Could you please confirm if this is a new issue? Sounds like your hitting it on 6.8.12+? > I've never tested this on a system with 5 levels of page tables, but with 5 levels you get > 52 bits of VA and you'll need to look at the KASLR logic (max_pfn + padding) to see where > your ranges are getting assigned. > > I'd start by dumping the kaslr_regions array. Here is how the ranges look like for the upstream kernel for two boots: Iteration 1: kaslr_region: base[0] ff4552df80000000 size_tb 1000 kaslr_region: end[0] fffffffffffff kaslr_region: base[1] ff69c69640000000 size_tb 3200 kaslr_region: base[2] ffd3140680000000 size_tb 40 Iteration 2: kaslr_region: base[0] ff3a9c84c0000000 size_tb 1000 kaslr_region: end[0] fffffffffffff kaslr_region: base[1] ff73d27480000000 size_tb 3200 kaslr_region: base[2] fff01edb40000000 size_tb 40 Regards, Bharata.