Messages in this thread Patch in this message |  | | | From | "Paul E. McKenney" <> | | Subject | [PATCH tip/core/rcu 4/4] rcu: add control variables to lockdep_rcu_dereference() diagnostics | | Date | Wed, 3 Mar 2010 07:46:59 -0800 |
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Add the values of rcu_scheduler_active() and debug_locks() to the lockdep_rcu_dereference() output to help diagnose RCU lockdep splats that occur shortly after the scheduler starts.
Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com> --- kernel/lockdep.c | 1 + 1 files changed, 1 insertions(+), 0 deletions(-) diff --git a/kernel/lockdep.c b/kernel/lockdep.c index 0c30d04..681bc2e 100644 --- a/kernel/lockdep.c +++ b/kernel/lockdep.c @@ -3822,6 +3822,7 @@ void lockdep_rcu_dereference(const char *file, const int line) printk("%s:%d invoked rcu_dereference_check() without protection!\n", file, line); printk("\nother info that might help us debug this:\n\n"); + printk("\nrcu_scheduler_active = %d, debug_locks = %d\n", rcu_scheduler_active, debug_locks); lockdep_print_held_locks(curr); printk("\nstack backtrace:\n"); dump_stack(); -- 1.6.6
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