Don not IPI offline CPUs, de-emphasize cond_resched_rcu_qs()
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Cover letter [PATCH tip/core/rcu 0/10] Don not IPI offline CPUs, de-emphasize cond_resched_rcu_qs()
Hello!
This series provides some fixes to prevent sending IPIs to offline CPUs and also replaces most uses of cond_resched_rcu_qs() with the new and improved cond_resched(). There are still a few remaining uses of cond_resched_rcu_qs() in rcutorture because the mechanisms that strengthen cond_resched() rely on RCU making forward progress. This series contains:
1. Stop resched_cpu() from sending IPIs to offline CPUs.
2. Stop switched_to_rt() from sending IPIs to offline CPUs.
3. Move netfilter from cond_resched_rcu_qs() to cond_resched().
4. Move mm from cond_resched_rcu_qs() to cond_resched().
5. Move workqueue from cond_resched_rcu_qs() to cond_resched().
6. Move trace from cond_resched_rcu_qs() to cond_resched().
7. Move softirq from cond_resched_rcu_qs() to cond_resched().
8. Move fs from cond_resched_rcu_qs() to cond_resched().
9. Remove cond_resched_rcu_qs() from documentation.
10. Improve performance by accounting for rcu_all_qs() in cond_resched().
Thanx, Paul
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Documentation/RCU/Design/Data-Structures/Data-Structures.html | 3 ++- Documentation/RCU/Design/Requirements/Requirements.html | 4 ++-- Documentation/RCU/stallwarn.txt | 10 ++++------ fs/file.c | 2 +- include/linux/rcupdate.h | 2 +- kernel/sched/core.c | 3 ++- kernel/sched/rt.c | 2 +- kernel/softirq.c | 2 +- kernel/trace/trace_benchmark.c | 2 +- kernel/workqueue.c | 2 +- mm/mlock.c | 2 +- net/netfilter/nf_conntrack_core.c | 2 +- 12 files changed, 18 insertions(+), 18 deletions(-)