diff options
| author | Paul E. McKenney <paulmck@kernel.org> | 2025-08-06 16:07:33 -0700 |
|---|---|---|
| committer | Paul E. McKenney <paulmck@kernel.org> | 2025-08-14 15:26:30 -0700 |
| commit | 1b0f583843287275298a559c14e10769fd771cec (patch) | |
| tree | 326f1556010ca7f6ff7d4d83669700dd9a3acba2 | |
| parent | b930ff84f3072df7ab3b0f1cd3a8bb5d02ec4dec (diff) | |
rcutorture: Suppress "Writer stall state" reports during boot
When rcutorture is running on only the one boot-time CPU while that CPU
is busy invoking initcall() functions, the added load is quite likely to
unduly delay the RCU grace-period kthread, rcutorture readers, and much
else besides. This can result in rcu_torture_stats_print() reporting
rcutorture writer stalls, which are not really a bug in that environment.
After all, one CPU can only do so much.
This commit therefore suppresses rcutorture writer stalls while the
kernel is booting, that is, while rcu_inkernel_boot_has_ended() continues
returning false.
Signed-off-by: Paul E. McKenney <paulmck@kernel.org>
| -rw-r--r-- | kernel/rcu/rcutorture.c | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/kernel/rcu/rcutorture.c b/kernel/rcu/rcutorture.c index 7a893d51d02b..49e048da4f68 100644 --- a/kernel/rcu/rcutorture.c +++ b/kernel/rcu/rcutorture.c @@ -2756,7 +2756,8 @@ rcu_torture_stats_print(void) cur_ops->stats(); if (rtcv_snap == rcu_torture_current_version && rcu_access_pointer(rcu_torture_current) && - !rcu_stall_is_suppressed()) { + !rcu_stall_is_suppressed() && + rcu_inkernel_boot_has_ended()) { int __maybe_unused flags = 0; unsigned long __maybe_unused gp_seq = 0; |