Hello!
This series adds following changes to the CSD-lock diagnostics (rebased on v6.11-rc1):
1. Print large CSD-lock-hold time numbers as negatives, courtesy of Paul E. McKenney.
2. Add api to provide an indication of ongoing CSD-lock stall, courtesy of Paul E. McKenney.
3. Add a backoff mechanism for repeated CSD-lock diagnostic reports of same incident,
courtesy of Paul E. McKenney.
4. Print only local CPU info when sched_clock goes backward, courtesy of Rik van Riel.
As communicated earlier at [1], I will be submitting these changes as part of RCU tree,
due to dependency of RCU commit "7c72dedb0079 rcu: Summarize RCU CPU stall warnings during
CSD-lock stalls" [2] on these changes.
Git tree is at [2]
[1] https://lore.kernel.org/lkml/20240722133559.GA667117@neeraj.linux/
[2] https://git.kernel.org/pub/scm/linux/kernel/git/neeraj.upadhyay/linux-rcu.git/commit/?h=rcustall.15.08.24a&id=7c72dedb0079e62c1c75dbab038332017f34a6b8
[3] https://git.kernel.org/pub/scm/linux/kernel/git/neeraj.upadhyay/linux-rcu.git/log/?h=csd.lock.15.08.24a
- Neeraj
Paul E. McKenney (3):
locking/csd_lock: Print large numbers as negatives
locking/csd_lock: Provide an indication of ongoing CSD-lock stall
locking/csd-lock: Use backoff for repeated reports of same incident
Rik van Riel (1):
smp: print only local CPU info when sched_clock goes backward
include/linux/smp.h | 6 ++++++
kernel/smp.c | 38 +++++++++++++++++++++++++++++++++-----
lib/Kconfig.debug | 1 +
3 files changed, 40 insertions(+), 5 deletions(-)
