On Wed, 2009-02-11 at 13:24 +0100, Peter Zijlstra wrote:
> On Wed, 2009-02-11 at 13:23 +0100, Peter Zijlstra wrote:
> > On Wed, 2009-02-11 at 15:14 +0300, Alexander Beregalov wrote:
> > > Hi
> > >
> > > Full dmesg is attached.
> > >
> > > 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: 8192
> > > .... MAX_LOCKDEP_CHAINS: 16384
> > > .... CHAINHASH_SIZE: 8192
> > > memory used by lock dependency info: 4351 kB
> > > per task-struct memory footprint: 2688 bytes
> > > <..>
> > > BUG: MAX_LOCKDEP_SUBCLASSES too low!
> > > turning off the locking correctness validator.
> >
> > Is this an allyesconfig or something other massive bloated?
>
> Sorry, not playing attention, its SUB classes.. let me look at that,
> that smells like a rotten annotation.
Could you run with the below patch, so that we can see where this
happens?
---
diff --git a/kernel/lockdep.c b/kernel/lockdep.c
index 06b0c35..4fe272c 100644
--- a/kernel/lockdep.c
+++ b/kernel/lockdep.c
@@ -2542,6 +2542,7 @@ static int __lock_acquire(struct lockdep_map *lock, unsigned int subclass,
debug_locks_off();
printk("BUG: MAX_LOCKDEP_SUBCLASSES too low!\n");
printk("turning off the locking correctness validator.\n");
+ dump_stack();
return 0;
}
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