Booting 3.0.4 + rt12 on a quadcore workstation (running fc14) gave me this: ---- ============================================= [ INFO: possible recursive locking detected ] 3.0.4-1.rt12.1.fc14.ccrma.i686.rtPAE #1 --------------------------------------------- swapper/0 is trying to acquire lock:(&parent->list_lock){+.+...}, at: [<c05054ce>] __cache_free.clone.27+0x45/0xc4
but task is already holding lock:
(&parent->list_lock){+.+...}, at: [<c050662c>] do_tune_cpucache+0xf0/0x2b0
other info that might help us debug this:
Possible unsafe locking scenario:
CPU0
----
lock(&parent->list_lock);
lock(&parent->list_lock);
*** DEADLOCK ***
May be due to missing lock nesting notation
3 locks held by swapper/0:
#0: (cache_chain_mutex){+.+...}, at: [<c0bedb96>]
kmem_cache_init_late+0x15/0x61
#1: (&per_cpu(slab_lock, __cpu).lock){+.+...}, at: [<c0504a53>]
__local_lock_irq+0x1e/0x5b
#2: (&parent->list_lock){+.+...}, at: [<c050662c>]
do_tune_cpucache+0xf0/0x2b0
stack backtrace: Pid: 0, comm: swapper Not tainted 3.0.4-1.rt12.1.fc14.ccrma.i686.rtPAE #1 Call Trace: [<c086e6f6>] ? printk+0x2d/0x2f [<c0479b36>] __lock_acquire+0x8b3/0xc2f [<c086fd96>] ? rt_spin_lock_slowlock+0x67/0x170 [<c04790ee>] ? mark_lock+0x26/0x1bb [<c05054ce>] ? __cache_free.clone.27+0x45/0xc4 [<c047a372>] lock_acquire+0xde/0x11d [<c05054ce>] ? __cache_free.clone.27+0x45/0xc4 [<c08703b4>] rt_spin_lock+0x3d/0x43 [<c05054ce>] ? __cache_free.clone.27+0x45/0xc4 [<c05054ce>] __cache_free.clone.27+0x45/0xc4 [<c0437c83>] ? test_ti_thread_flag+0x8/0x10 [<c0505303>] kmem_cache_free+0x73/0xe1 [<c05053c0>] slab_destroy+0x4f/0x53 [<c0505458>] free_block+0x94/0xc5 [<c0506645>] do_tune_cpucache+0x109/0x2b0 [<c05069c7>] enable_cpucache+0x7b/0xa7 [<c0bedba7>] kmem_cache_init_late+0x26/0x61 [<c0bcd68a>] start_kernel+0x24f/0x367 [<c0bcd1d1>] ? loglevel+0x1a/0x1a [<c0bcd13b>] ? reserve_ebda_region+0x70/0x72 [<c0bcd0c3>] i386_start_kernel+0xb2/0xba Console: colour VGA+ 80x25 console [tty0] enabled Lock dependency validator: Copyright (c) 2006 Red Hat, Inc., Ingo Molnar ... MAX_LOCKDEP_SUBCLASSES: 8 ... MAX_LOCK_DEPTH: 48 ... MAX_LOCKDEP_KEYS: 8191 ... CLASSHASH_SIZE: 4096 ... MAX_LOCKDEP_ENTRIES: 32768 ... MAX_LOCKDEP_CHAINS: 65536 ... CHAINHASH_SIZE: 32768 ----I started working and a little while later the machine froze (jack + heavy prioritized udp traffic in eth1 - with the r8169 driver). It recognized alt-sysrq boot so it was not completely dead. Nothing left on the logs to see.
Full config attached. -- Fernando
Attachment:
config.bz2
Description: application/bzip
