smp: Reduce logging due to dump_stack of CSD waiters

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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>

...

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Imran Khan 2023-05-09 08:31:23 +10:00 • committed by Paul E. McKenney

parent 06c2afb862

commit 5bd00f6db0

1 changed files with 2 additions and 1 deletions

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kernel/smp.c

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