Messages in this thread | | | Date | Wed, 2 Dec 2009 12:09:55 -0800 | From | "Paul E. McKenney" <> | Subject | [PATCH tip/core/rcu 0/4] rcu: preemptible expedited grace periods and cleanups |
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This patchset includes some cleanups, improved diagnostics, and an implementation of expedited preemptible RCU grace periods that is actually expedited:
1. Rename the "quiet" functions. The name rcu_quiet_cpu() was clear enough, but now that we have four flavors of quietness with more on the way, we need more meaningful names.
2. Enable a fourth level of the rcu_node hierarchy. No, we really don't need the ability to run on million-CPU SMP systems at the moment, but the additional level allows more vigorous stress-testing on 16-CPU systems.
3. Add an implementation of synchronize_rcu_expedited() that actually expedites preemptible-RCU grace periods.
4. Make RCU_CPU_STALL_DETECTOR be on by default. If this works well, the #ifdefs will eventually be removed to reduce testing load.
This patchset is intended for 2.6.34, but has passed sufficient testing that it could safely be included in 2.6.33, if desired.
b/kernel/rcutorture.c | 34 +++++-- b/kernel/rcutree.c | 66 ++++++++------- b/kernel/rcutree.h | 3 b/kernel/rcutree_plugin.h | 13 +-- b/kernel/rcutree_trace.c | 11 +- b/lib/Kconfig.debug | 3 kernel/rcutree.c | 16 ++- kernel/rcutree.h | 51 ++++++++++- kernel/rcutree_plugin.h | 198 +++++++++++++++++++++++++++++++++++++++++++--- 9 files changed, 324 insertions(+), 71 deletions(-)
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