Re: [BUG] 2.6.25-rc5-mm1 kernel panic with "Exception: 501 " on powerpc
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From: Andrew Morton <akpm@linux-foundation.org>
Date: 2008-03-12 17:47:44
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On Wed, 12 Mar 2008 18:25:37 +0530 Kamalesh Babulal [off-list ref] wrote:
quoted hunk ↗ jump to hunk
Hi Andrew, The 2.6.25-rc5-mm1 kernel panics while bootup on powerpc returning from prom_init Unable to handle kernel paging request for data at address 0x00000000 Faulting instruction address: 0xc00000000000d5dc cpu 0x0: Vector: 300 (Data Access) at [c0000000007636e0] pc: c00000000000d5dc: .do_IRQ+0x74/0x1f4 lr: c00000000000d5a8: .do_IRQ+0x40/0x1f4 sp: c000000000763960 msr: 8000000000001032 dar: 0 dsisr: 40000000 current = 0xc000000000688e60 paca = 0xc000000000689900 pid = 0, comm = swapper enter ? for help [c000000000763a00] c000000000004c24 hardware_interrupt_entry+0x24/0x28--- Exception: 501 (Hardware Interrupt) at c0000000006021b0 .free_bootmem_core+0x94/0xcc[link register ] c00000000060373c .free_bootmem_with_active_regions+0x78/0xb8 [c000000000763cf0] c000000000602610 .init_bootmem_core+0x5c/0xfc (unreliable) [c000000000763d80] c0000000005eb68c .do_init_bootmem+0x964/0xaf0 [c000000000763e50] c0000000005e03b0 .setup_arch+0x1a4/0x218 [c000000000763ee0] c0000000005d76bc .start_kernel+0xe8/0x424 [c000000000763f90] c000000000008590 .start_here_common+0x60/0xd0
Beats me. Maybe we're still enabling interrupts too early. But the new semaphore code got fixed (didn't it?)