Geert Uytterhoeven wrote: > When running 2.6.29-rc5+ on PS3 (ppc64), I got the following BUG once during > bootup: > > | Freeing unused kernel memory: 3436k freed > | BUG: MAX_STACK_TRACE_ENTRIES too low! > | turning off the locking correctness validator. > | Call Trace: > | [c000000006e1b640] [c00000000000f850] .show_stack+0x6c/0x16c (unreliable) > | [c000000006e1b6f0] [c00000000007cf6c] .save_trace+0xe0/0x108 > | [c000000006e1b780] [c00000000007d058] .add_lock_to_list+0xc4/0x124 > | [c000000006e1b830] [c0000000000816d0] .__lock_acquire+0x13c4/0x17c8 > | [c000000006e1b930] [c000000000081b78] .lock_acquire+0xa4/0xec > | [c000000006e1b9f0] [c0000000003be034] ._spin_lock+0x34/0x58 > | [c000000006e1ba80] [c0000000000d3e40] .kmem_cache_free+0x84/0x1a8 > | [c000000006e1bb30] [c0000000001f9abc] .idr_remove+0x214/0x248 > | [c000000006e1bbf0] [c00000000002867c] .destroy_context+0x34/0x64 > | [c000000006e1bc80] [c00000000005008c] .__mmdrop+0x4c/0x7c > | [c000000006e1bd10] [c00000000004de90] .finish_task_switch+0xec/0x14c > | [c000000006e1bdb0] [c00000000004e6fc] .schedule_tail+0x2c/0xa0 > | [c000000006e1be30] [c000000000007738] .ret_from_fork+0x4/0xcc > | [c000000006e1be30] [c000000000007738] .ret_from_fork+0x4/0xcc > | [c000000006e1be30] [c000000000007738] .ret_from_fork+0x4/0xcc > | [c000000006e1be30] [c000000000007738] .ret_from_fork+0x4/0xcc > | [c000000006e1be30] [c000000000007738] .ret_from_fork+0x4/0xcc > | [c000000006e1be30] [c000000000007738] .ret_from_fork+0x4/0xcc > | [c000000006e1be30] [c000000000007738] .ret_from_fork+0x4/0xcc > | [c000000006e1be30] [c000000000007738] .ret_from_fork+0x4/0xcc > | [c000000006e1be30] [c000000000007738] .ret_from_fork+0x4/0xcc > | [c000000006e1be30] [c000000000007738] .ret_from_fork+0x4/0xcc > | [c000000006e1be30] [c000000000007738] .ret_from_fork+0x4/0xcc > | [c000000006e1be30] [c000000000007738] .ret_from_fork+0x4/0xcc > | [c000000006e1be30] [c000000000007738] .ret_from_fork+0x4/0xcc > | [c000000006e1be30] [c000000000007738] .ret_from_fork+0x4/0xcc > | [c000000006e1be30] [c000000000007738] .ret_from_fork+0x4/0xcc > | [c000000006e1be30] [c000000000007738] .ret_from_fork+0x4/0xcc > | [c000000006e1be30] [c000000000007738] .ret_from_fork+0x4/0xcc > | [c000000006e1be30] [c000000000007738] .ret_from_fork+0x4/0xcc > | [c000000006e1be30] [c000000000007738] .ret_from_fork+0x4/0xcc > | [c000000006e1be30] [c000000000007738] .ret_from_fork+0x4/0xcc > | [c000000006e1be30] [c000000000007738] .ret_from_fork+0x4/0xcc > | [c000000006e1be30] [c000000000007738] .ret_from_fork+0x4/0xcc > | [c000000006e1be30] [c000000000007738] .ret_from_fork+0x4/0xcc > | [c000000006e1be30] [c000000000007738] .ret_from_fork+0x4/0xcc > | [c000000006e1be30] [c000000000007738] .ret_from_fork+0x4/0xcc > | [c000000006e1be30] [c000000000007738] .ret_from_fork+0x4/0xcc > | [c000000006e1be30] [c000000000007738] .ret_from_fork+0x4/0xcc > | [c000000006e1be30] [c000000000007738] .ret_from_fork+0x4/0xcc > | [c000000006e1be30] [c000000000007738] .ret_from_fork+0x4/0xcc > | [c000000006e1be30] [c000000000007738] .ret_from_fork+0x4/0xcc > | [c000000006e1be30] [c000000000007738] .ret_from_fork+0x4/0xcc > | [c000000006e1be30] [c000000000007738] .ret_from_fork+0x4/0xcc > | [c000000006e1be30] [c000000000007738] .ret_from_fork+0x4/0xcc > | [c000000006e1be30] [c000000000007738] .ret_from_fork+0x4/0xcc > | [c000000006e1be30] [c000000000007738] .ret_from_fork+0x4/0xcc > | [c000000006e1be30] [c000000000007738] .ret_from_fork+0x4/0xcc > | [c000000006e1be30] [c000000000007738] .ret_from_fork+0x4/0xcc > | [c000000006e1be30] [c000000000007738] .ret_from_fork+0x4/0xcc > | [c000000006e1be30] [c000000000007738] .ret_from_fork+0x4/0xcc > | [c000000006e1be30] [c000000000007738] .ret_from_fork+0x4/0xcc > | [c000000006e1be30] [c000000000007738] .ret_from_fork+0x4/0xcc > | [c000000006e1be30] [c000000000007738] .ret_from_fork+0x4/0xcc > | [c000000006e1be30] [c000000000007738] .ret_from_fork+0x4/0xcc > | [c000000006e1be30] [c000000000007738] .ret_from_fork+0x4/0xcc > | [c000000006e1be30] [c000000000007738] .ret_from_fork+0x4/0xcc > | [c000000006e1be30] [c000000000007738] .ret_from_fork+0x4/0xcc > | [c000000006e1be30] [c000000000007738] .ret_from_fork+0x4/0xcc > | [c000000006e1be30] [c000000000007738] .ret_from_fork+0x4/0xcc > | [c000000006e1be30] [c000000000007738] .ret_from_fork+0x4/0xcc > | [c000000006e1be30] [c000000000007738] .ret_from_fork+0x4/0xcc > | [c000000006e1be30] [c000000000007738] .ret_from_fork+0x4/0xcc > | [c000000006e1be30] [c000000000007738] .ret_from_fork+0x4/0xcc > | [c000000006e1be30] [c000000000007738] .ret_from_fork+0x4/0xcc > > (There are 65 call trace lines) > > After that the system continued.
It looks like the stack trace code got stuck in a loop (the last 53 entries are identical) - increasing the limit won't change this, it would just keep more entries. -- ------------------------------------------------------------ Gary Thomas | Consulting for the MLB Associates | Embedded world ------------------------------------------------------------ _______________________________________________ Linuxppc-dev mailing list Linuxppc-dev@ozlabs.org https://ozlabs.org/mailman/listinfo/linuxppc-dev
