diff options
| author | Srivatsa S. Bhat <srivatsa.bhat@linux.vnet.ibm.com> | 2014-05-22 10:44:05 +1000 |
|---|---|---|
| committer | Stephen Rothwell <sfr@canb.auug.org.au> | 2014-05-22 10:44:05 +1000 |
| commit | ddb7fec09b32ec61e428e7e882b6821a10d3df3f (patch) | |
| tree | 117ce6638224286c5fee127749b5c73eb19fda02 | |
| parent | ff3b5849fc1447f8e2e424fb71bf2d6f119f580f (diff) | |
smp-print-more-useful-debug-info-upon-receiving-ipi-on-an-offline-cpu-v5
Signed-off-by: Srivatsa S. Bhat <srivatsa.bhat@linux.vnet.ibm.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Ingo Molnar <mingo@kernel.org>
Cc: Tejun Heo <tj@kernel.org>
Cc: Rusty Russell <rusty@rustcorp.com.au>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Christoph Hellwig <hch@infradead.org>
Cc: Mel Gorman <mgorman@suse.de>
Cc: Rik van Riel <riel@redhat.com>
Cc: Borislav Petkov <bp@suse.de>
Cc: Steven Rostedt <rostedt@goodmis.org>
Cc: Mike Galbraith <mgalbraith@suse.de>
Cc: Gautham R Shenoy <ego@linux.vnet.ibm.com>
Cc: "Paul E. McKenney" <paulmck@linux.vnet.ibm.com>
Cc: Oleg Nesterov <oleg@redhat.com>
Cc: Rafael J. Wysocki <rjw@rjwysocki.net>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
| -rw-r--r-- | kernel/smp.c | 6 |
1 files changed, 4 insertions, 2 deletions
diff --git a/kernel/smp.c b/kernel/smp.c index f864921fc82..306f8180b0d 100644 --- a/kernel/smp.c +++ b/kernel/smp.c @@ -195,13 +195,15 @@ void generic_smp_call_function_single_interrupt(void) */ if (unlikely(!cpu_online(smp_processor_id()) && !warned)) { warned = true; - WARN_ON(1); + WARN(1, "IPI on offline CPU %d\n", smp_processor_id()); + /* * We don't have to use the _safe() variant here * because we are not invoking the IPI handlers yet. */ llist_for_each_entry(csd, entry, llist) - pr_warn("SMP IPI Payload: %pS \n", csd->func); + pr_warn("IPI callback %pS sent to offline CPU\n", + csd->func); } llist_for_each_entry_safe(csd, csd_next, entry, llist) { |