diff options
| author | Paul E. McKenney <paulmck@linux.vnet.ibm.com> | 2010-02-22 17:05:05 -0800 |
|---|---|---|
| committer | Ingo Molnar <mingo@elte.hu> | 2010-02-25 10:35:02 +0100 |
| commit | 1ed509a225008c9e8c0644fbd22168e09a7383a0 (patch) | |
| tree | db65a58258bb968e7bc922dab14f4f0714a7667e /kernel/rcutree.c | |
| parent | 6155fec92e85f07d99e9746234496215443ffb0d (diff) | |
| download | blackbird-op-linux-1ed509a225008c9e8c0644fbd22168e09a7383a0.tar.gz blackbird-op-linux-1ed509a225008c9e8c0644fbd22168e09a7383a0.zip | |
rcu: Add RCU_CPU_STALL_VERBOSE to dump detailed per-task information
When RCU detects a grace-period stall, it currently just prints
out the PID of any tasks doing the stalling. This patch adds
RCU_CPU_STALL_VERBOSE, which enables the more-verbose reporting
from sched_show_task().
Suggested-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
Cc: laijs@cn.fujitsu.com
Cc: dipankar@in.ibm.com
Cc: mathieu.desnoyers@polymtl.ca
Cc: josh@joshtriplett.org
Cc: dvhltc@us.ibm.com
Cc: niv@us.ibm.com
Cc: peterz@infradead.org
Cc: rostedt@goodmis.org
Cc: Valdis.Kletnieks@vt.edu
Cc: dhowells@redhat.com
LKML-Reference: <1266887105-1528-21-git-send-email-paulmck@linux.vnet.ibm.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'kernel/rcutree.c')
| -rw-r--r-- | kernel/rcutree.c | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/kernel/rcutree.c b/kernel/rcutree.c index b07be37d2aa3..525d39810616 100644 --- a/kernel/rcutree.c +++ b/kernel/rcutree.c @@ -489,6 +489,10 @@ static void print_other_cpu_stall(struct rcu_state *rsp) smp_processor_id(), (long)(jiffies - rsp->gp_start)); trigger_all_cpu_backtrace(); + /* If so configured, complain about tasks blocking the grace period. */ + + rcu_print_detail_task_stall(rsp); + force_quiescent_state(rsp, 0); /* Kick them all. */ } |
