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Groups > linux.kernel > #1287997
| From | "Paul E. McKenney" <paulmck@linux.vnet.ibm.com> |
|---|---|
| Newsgroups | linux.kernel |
| Subject | [PATCH v2 tip/core/rcu 0/11] Expedited-grace-period changes for 4.5 |
| Date | 2015-12-10 00:10 +0100 |
| Message-ID | <qDW1Y-6ob-11@gated-at.bofh.it> (permalink) |
| Organization | linux.* mail to news gateway |
Hello! This series contains follow-on cleanup changes to RCU's expedited grace-period functionality. The patches in this series are as follows: 1. Short-circuit synchronize_sched_expedited() if there is only one CPU. 2. Update comment to clarify the role of ->expmaskinitnext. 3. Separate concerns by moving smp_mb() from rcu_seq_snap() to rcu_exp_gp_seq_snap(). 4. Safe a few lines of code by inverting the sense of sync_rcu_exp_select_cpus() "if" statement. 5. Reduce expedited GP memory contention via per-CPU variables. 6. Get rid of (some) empty stall-warning messages by resolving stall-warning ties. 7. Add more diagnostics to expedited stall warning messages. 8. Add rcu_normal kernel parameter to suppress expediting for the benefit of aggressive real-time systems. 9-10. Allow expedited grace periods to be disabled just before init is spawned, allowing them to speed up boot without interfering with run-time real-time workloads. 11. Remove TINY_RCU bloat from pointless (to TINY_RCU) boot parameters. Changes since v1: o Add patch 11 removing TINY_RCU bloat. o Get cover letter and patches correctly associated. :-/ Thanx, Paul ------------------------------------------------------------------------ Documentation/kernel-parameters.txt | 37 ++++++++++++---- include/linux/rcupdate.h | 15 ++++++ init/main.c | 2 kernel/ksysfs.c | 26 ++++++++++- kernel/rcu/srcu.c | 2 kernel/rcu/tree.c | 79 +++++++++++++++++++++++------------- kernel/rcu/tree.h | 10 ++-- kernel/rcu/tree_plugin.h | 6 ++ kernel/rcu/tree_trace.c | 18 +++++--- kernel/rcu/update.c | 24 +++++++++- 10 files changed, 165 insertions(+), 54 deletions(-) -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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[PATCH v2 tip/core/rcu 0/11] Expedited-grace-period changes for 4.5 "Paul E. McKenney" <paulmck@linux.vnet.ibm.com> - 2015-12-10 00:10 +0100 [PATCH v2 tip/core/rcu 06/11] rcu: Make expedited grace periods resolve stall-warning ties "Paul E. McKenney" <paulmck@linux.vnet.ibm.com> - 2015-12-10 00:10 +0100
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