Has anyone run into any problems on 6.15-rc1 with this stuff? 0xf75fe000 is the mem_map[] entry for the first page >4GB. It obviously wasn't allocated, thus the oops. Looks like the memblock for the >4GB memory didn't get removed although the pgdats seem correct. I'll dig into it some more. Just wanted to make sure there wasn't a fix out there already. The way I'm triggering this is booting qemu with a 32-bit PAE kernel, and "-m 4096" (or more). > [ 0.003806] Warning: only 4GB will be used. Support for for CONFIG_HIGHMEM64G was removed! ... > [ 0.561310] BUG: unable to handle page fault for address: f75fe000 > [ 0.562226] #PF: supervisor write access in kernel mode > [ 0.562947] #PF: error_code(0x0002) - not-present page > [ 0.563653] *pdpt = 0000000002da2001 *pde = 000000000300c067 *pte = 0000000000000000 > [ 0.564728] Oops: Oops: 0002 [#1] SMP NOPTI > [ 0.565315] CPU: 0 UID: 0 PID: 0 Comm: swapper Not tainted 6.15.0-rc1-00288-ge618ee89561b-dirty #311 PREEMPT(undef) > [ 0.567428] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.15.0-1 04/01/2014 > [ 0.568777] EIP: __free_pages_core+0x3c/0x74 > [ 0.569378] Code: c3 d3 e6 83 ec 10 89 44 24 08 89 74 24 04 c7 04 24 c6 32 3a c2 89 55 f4 e8 a9 11 45 fe 85 f6 8b 55 f4 74 19 89 d8 31 c9 66 90 <0f> ba 30 0d c7 40 1c 00 00 00 00 41 83 c0 28 39 ce 75 ed 8b 03 c1 > [ 0.571943] EAX: f75fe000 EBX: f75fe000 ECX: 00000000 EDX: 0000000a > [ 0.572806] ESI: 00000400 EDI: 00500000 EBP: c247becc ESP: c247beb4 > [ 0.573776] DS: 007b ES: 007b FS: 00d8 GS: 0000 SS: 0068 EFLAGS: 00210046 > [ 0.574606] CR0: 80050033 CR2: f75fe000 CR3: 02da6000 CR4: 000000b0 > [ 0.575464] Call Trace: > [ 0.575816] memblock_free_pages+0x11/0x2c > [ 0.576392] memblock_free_all+0x2ce/0x3a0 > [ 0.576955] mm_core_init+0xf5/0x320 > [ 0.577423] start_kernel+0x296/0x79c > [ 0.577950] ? set_init_arg+0x70/0x70 > [ 0.578478] ? load_ucode_bsp+0x13c/0x1a8 > [ 0.579059] i386_start_kernel+0xad/0xb0 > [ 0.579614] startup_32_smp+0x151/0x154 > [ 0.580100] Modules linked in: > [ 0.580358] CR2: 00000000f75fe000 > [ 0.580630] ---[ end trace 0000000000000000 ]--- > [ 0.581111] EIP: __free_pages_core+0x3c/0x74 > [ 0.581455] Code: c3 d3 e6 83 ec 10 89 44 24 08 89 74 24 04 c7 04 24 c6 32 3a c2 89 55 f4 e8 a9 11 45 fe 85 f6 8b 55 f4 74 19 89 d8 31 c9 66 90 <0f> ba 30 0d c7 40 1c 00 00 00 00 41 83 c0 28 39 ce 75 ed 8b 03 c1 > [ 0.584767] EAX: f75fe000 EBX: f75fe000 ECX: 00000000 EDX: 0000000a > [ 0.585651] ESI: 00000400 EDI: 00500000 EBP: c247becc ESP: c247beb4 > [ 0.586530] DS: 007b ES: 007b FS: 00d8 GS: 0000 SS: 0068 EFLAGS: 00210046 > [ 0.587480] CR0: 80050033 CR2: f75fe000 CR3: 02da6000 CR4: 000000b0 > [ 0.588344] Kernel panic - not syncing: Attempted to kill the idle task! > [ 0.589435] ---[ end Kernel panic - not syncing: Attempted to kill the idle task! ]--- > [ 0.561310] BUG: unable to handle page fault for address: f75fe000 > [ 0.562226] #PF: supervisor write access in kernel mode > [ 0.562947] #PF: error_code(0x0002) - not-present page > [ 0.563653] *pdpt = 0000000002da2001 *pde = 000000000300c067 *pte = 0000000000000000 > [ 0.564728] Oops: Oops: 0002 [#1] SMP NOPTI > [ 0.565315] CPU: 0 UID: 0 PID: 0 Comm: swapper Not tainted 6.15.0-rc1-00288-ge618ee89561b-dirty #311 PREEMPT(undef) > [ 0.567428] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.15.0-1 04/01/2014 > [ 0.568777] EIP: __free_pages_core+0x3c/0x74 > [ 0.569378] Code: c3 d3 e6 83 ec 10 89 44 24 08 89 74 24 04 c7 04 24 c6 32 3a c2 89 55 f4 e8 a9 11 45 fe 85 f6 8b 55 f4 74 19 89 d8 31 c9 66 90 <0f> ba 30 0d c7 40 1c 00 00 00 00 41 83 c0 28 39 ce 75 ed 8b 03 c1 > [ 0.571943] EAX: f75fe000 EBX: f75fe000 ECX: 00000000 EDX: 0000000a > [ 0.572806] ESI: 00000400 EDI: 00500000 EBP: c247becc ESP: c247beb4 > [ 0.573776] DS: 007b ES: 007b FS: 00d8 GS: 0000 SS: 0068 EFLAGS: 00210046 > [ 0.574606] CR0: 80050033 CR2: f75fe000 CR3: 02da6000 CR4: 000000b0 > [ 0.575464] Call Trace: > [ 0.575816] memblock_free_pages+0x11/0x2c > [ 0.576392] memblock_free_all+0x2ce/0x3a0 > [ 0.576955] mm_core_init+0xf5/0x320 > [ 0.577423] start_kernel+0x296/0x79c > [ 0.577950] ? set_init_arg+0x70/0x70 > [ 0.578478] ? load_ucode_bsp+0x13c/0x1a8 > [ 0.579059] i386_start_kernel+0xad/0xb0 > [ 0.579614] startup_32_smp+0x151/0x154 > [ 0.580100] Modules linked in: > [ 0.580358] CR2: 00000000f75fe000 > [ 0.580630] ---[ end trace 0000000000000000 ]--- > [ 0.581111] EIP: __free_pages_core+0x3c/0x74 > [ 0.581455] Code: c3 d3 e6 83 ec 10 89 44 24 08 89 74 24 04 c7 04 24 c6 32 3a c2 89 55 f4 e8 a9 11 45 fe 85 f6 8b 55 f4 74 19 89 d8 31 c9 66 90 <0f> ba 30 0d c7 40 1c 00 00 00 00 41 83 c0 28 39 ce 75 ed 8b 03 c1 > [ 0.584767] EAX: f75fe000 EBX: f75fe000 ECX: 00000000 EDX: 0000000a > [ 0.585651] ESI: 00000400 EDI: 00500000 EBP: c247becc ESP: c247beb4 > [ 0.586530] DS: 007b ES: 007b FS: 00d8 GS: 0000 SS: 0068 EFLAGS: 00210046 > [ 0.587480] CR0: 80050033 CR2: f75fe000 CR3: 02da6000 CR4: 000000b0 > [ 0.588344] Kernel panic - not syncing: Attempted to kill the idle task! > [ 0.589435] ---[ end Kernel panic - not syncing: Attempted to kill the idle task! ]---
