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| author | Paul E. McKenney <paul.mckenney@linaro.org> | 2012-09-25 01:08:31 +0200 |
|---|---|---|
| committer | Paul E. McKenney <paulmck@linux.vnet.ibm.com> | 2012-10-23 23:46:47 +0200 |
| commit | 489832609a1ad7189d11715d8cefb457d90182c5 (patch) | |
| tree | b4ba989f1852cdda9fac8c4671c21522b730c69a /kernel/rcutorture.c | |
| parent | rcu: Fix comment about _rcu_barrier()/orphanage exclusion (diff) | |
| download | linux-489832609a1ad7189d11715d8cefb457d90182c5.tar.xz linux-489832609a1ad7189d11715d8cefb457d90182c5.zip | |
rcu: Make rcutorture give diagnostics if CPU offline fails
This commit causes rcutorture to print the errno if cpu_down() fails
when the rcutorture "verbose" module parameter is specified.
Signed-off-by: Paul E. McKenney <paul.mckenney@linaro.org>
Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
Diffstat (limited to 'kernel/rcutorture.c')
| -rw-r--r-- | kernel/rcutorture.c | 9 |
1 files changed, 8 insertions, 1 deletions
diff --git a/kernel/rcutorture.c b/kernel/rcutorture.c index aaa7b9f3532a..9900f560f1bd 100644 --- a/kernel/rcutorture.c +++ b/kernel/rcutorture.c @@ -1502,6 +1502,7 @@ rcu_torture_onoff(void *arg) unsigned long delta; int maxcpu = -1; DEFINE_RCU_RANDOM(rand); + int ret; unsigned long starttime; VERBOSE_PRINTK_STRING("rcu_torture_onoff task started"); @@ -1522,7 +1523,13 @@ rcu_torture_onoff(void *arg) torture_type, cpu); starttime = jiffies; n_offline_attempts++; - if (cpu_down(cpu) == 0) { + ret = cpu_down(cpu); + if (ret) { + if (verbose) + pr_alert("%s" TORTURE_FLAG + "rcu_torture_onoff task: offline %d failed: errno %d\n", + torture_type, cpu, ret); + } else { if (verbose) pr_alert("%s" TORTURE_FLAG "rcu_torture_onoff task: offlined %d\n", |