Re: Warnings when booting rc5 on a mpc83xx based board
From: Nathan Lynch <hidden>
Date: 2007-01-16 20:11:20
Joakim Tjernlund wrote:
quoted hunk ↗ jump to hunk
after upgrading to rc5 I get this: IPIC (128 IRQ sources) at fdefd700 QEIC (64 IRQ sources) at fdefc080 PID hash table entries: 512 (order: 9, 2048 bytes) ------------[ cut here ]------------ Badness at c00f4278 [verbose debug info unavailable] Call Trace: [C0249DC0] [C00085BC] show_stack+0x48/0x194 (unreliable) [C0249DF0] [C00F2158] report_bug+0x84/0xac [C0249E00] [C000DD28] program_check_exception+0xe0/0x538 [C0249E40] [C000F78C] ret_from_except_full+0x0/0x4c--- Exception: 700 at kref_get+0xc/0x24 LR = of_node_get+0x20/0x38[C0249F00] [FFFFFFFF] 0xffffffff (unreliable) [C0249F10] [C000CCA0] of_find_node_by_type+0x8c/0xd0 [C0249F30] [C02198A0] get_freq+0x2c/0x80 [C0249F50] [C021992C] generic_calibrate_decr+0x38/0xdc [C0249F70] [C0219E5C] time_init+0x48c/0x530 [C0249FD0] [C02135F4] start_kernel+0x120/0x250 [C0249FF0] [00003438] 0x3438
Looks like it could be an unbalanced of_node_put causing a node's refcount to underflow, probably the root node. The warning in kref_get has unearthed a couple of these recently, see http://patchwork.ozlabs.org/linuxppc/patch?id=8840 for example.