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| author | Paul E. McKenney <paulmck@kernel.org> | 2020-11-11 10:12:05 -0800 |
|---|---|---|
| committer | Paul E. McKenney <paulmck@kernel.org> | 2021-01-04 13:53:41 -0800 |
| commit | f3ea978b712f768a02137e867aced5bfdcea670e (patch) | |
| tree | 1868863884a3c2b7180ff07481f2e25c2e02a118 /kernel/scftorture.c | |
| parent | 00504537f44422a99d97f615f2b3ee17cfba194d (diff) | |
| download | linux-f3ea978b712f768a02137e867aced5bfdcea670e.tar.bz2 | |
scftorture: Add debug output for wrong-CPU warning
This commit adds the desired CPU, the actual CPU, and nr_cpu_ids to
the wrong-CPU warning in scftorture_invoker(), the better to help with
debugging.
Signed-off-by: Paul E. McKenney <paulmck@kernel.org>
Diffstat (limited to 'kernel/scftorture.c')
| -rw-r--r-- | kernel/scftorture.c | 6 |
1 files changed, 5 insertions, 1 deletions
diff --git a/kernel/scftorture.c b/kernel/scftorture.c index d55a9f8cda3d..2377cbb32474 100644 --- a/kernel/scftorture.c +++ b/kernel/scftorture.c @@ -398,6 +398,7 @@ static void scftorture_invoke_one(struct scf_statistics *scfp, struct torture_ra static int scftorture_invoker(void *arg) { int cpu; + int curcpu; DEFINE_TORTURE_RANDOM(rand); struct scf_statistics *scfp = (struct scf_statistics *)arg; bool was_offline = false; @@ -412,7 +413,10 @@ static int scftorture_invoker(void *arg) VERBOSE_SCFTORTOUT("scftorture_invoker %d: Waiting for all SCF torturers from cpu %d", scfp->cpu, smp_processor_id()); // Make sure that the CPU is affinitized appropriately during testing. - WARN_ON_ONCE(smp_processor_id() != scfp->cpu); + curcpu = smp_processor_id(); + WARN_ONCE(curcpu != scfp->cpu % nr_cpu_ids, + "%s: Wanted CPU %d, running on %d, nr_cpu_ids = %d\n", + __func__, scfp->cpu, curcpu, nr_cpu_ids); if (!atomic_dec_return(&n_started)) while (atomic_read_acquire(&n_started)) { |