smp: Reduce logging due to dump_stack of CSD waiters
If a waiter is waiting for CSD lock, its call stack will not change between first and subsequent hang detection for the same CSD lock. Therefore, do dump_stack only for first-time detection for a given waiter. This avoids excessive logging on systems with hundreds of CPUs where repetitive dump_stack from hundreds of CPUs would otherwise flood the console. Signed-off-by: Imran Khan <imran.f.khan@oracle.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Juergen Gross <jgross@suse.com> Cc: Valentin Schneider <vschneid@redhat.com> Cc: Yury Norov <yury.norov@gmail.com> Signed-off-by: Paul E. McKenney <paulmck@kernel.org>
This commit is contained in:
parent
06c2afb862
commit
5bd00f6db0
|
@ -259,7 +259,8 @@ static bool csd_lock_wait_toolong(struct __call_single_data *csd, u64 ts0, u64 *
|
|||
arch_send_call_function_single_ipi(cpu);
|
||||
}
|
||||
}
|
||||
dump_stack();
|
||||
if (firsttime)
|
||||
dump_stack();
|
||||
*ts1 = ts2;
|
||||
|
||||
return false;
|
||||
|
|
Loading…
Reference in New Issue