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Date: Fri, 1 Dec 2017 11:21:22 -0800 From: "Paul E. McKenney" <paulmck@...ux.vnet.ibm.com> To: linux-kernel@...r.kernel.org Cc: mingo@...nel.org, jiangshanlai@...il.com, dipankar@...ibm.com, akpm@...ux-foundation.org, mathieu.desnoyers@...icios.com, josh@...htriplett.org, tglx@...utronix.de, peterz@...radead.org, rostedt@...dmis.org, dhowells@...hat.com, edumazet@...gle.com, fweisbec@...il.com, oleg@...hat.com Subject: [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 ------------------------------------------------------------------------ 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(-)
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