Preview of fourth set of RCU changes for 3.3
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- v1 Latest7 patches 21 repliesIn review
Patches in v1 No applies recorded yet
| # | Subject and files | Size | Replies | Applied |
|---|---|---|---|---|
| 1/7 | rcu: Don't check irq nesting from rcu idle entry/exitkernel/ | +8 | 0 replies | |
| 2/7 | rcu: Irq nesting is always 0 on rcu_enter_idle_commonkernel/ | +2 | 0 replies | |
| 3/7 | rcu: Keep invoking callbacks if CPU otherwise idlekernel/ kernel/ kernel/ | +19 | 0 replies | |
| 4/7 | rcu: Adaptive dyntick-idle preparationkernel/ | +43 | 0 replies | |
| 5/7 | rcu: remove redundant rcu_cpu_stall_suppress declarationkernel/ | +0 | 0 replies | |
| 6/7 | driver-core/cpu: Add cpu_is_hotpluggable() for rcutorture error analysisdrivers/ include/ kernel/ | +14 | 2 replies | |
| 7/7 | rcu: Quiet RCU-lockdep warnings involving interrupt disablingkernel/ | +6 | 22 replies |
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Cover letter [PATCH tip/core/rcu 0/7] Preview of fourth set of RCU changes for 3.3
Hello!
This patchset adds to the earlier sets:
https://lkml.org/lkml/2011/11/2/363 https://lkml.org/lkml/2011/11/15/302 https://lkml.org/lkml/2011/11/28/588
This fourth set adds more infrastructure for Frederic's user-mode nohz work, additional improvements to RCU_FAST_NO_HZ, and a few bug fixes. The patches are as follows:
1,2. More support for user-mode nohz (courtesy of Frederic Weisbecker).
3. Ignore RCU callback batch limits if the CPU is otherwise idle.
This allows a CPU to more quickly clear a backlog of callbacks, and thus more quickly enter dyntick-idle mode.
4. Adaptive dyntick-entry approach that more efficiently handles
the various possible grace-period begin/end scenarios.
5. Remove a redundant variable declaration.
6. Allow rcutorture to avoid attempting to offline unhotpluggable CPUs.
7. Fix RCU-lockdep splats involving RCU read-side critical sections
that partially overlap irq-disable code sections (courtesy of Yong Zhang).
For a testing-only version of this patchset from git, please see the following subject-to-rebase branch, based on 3.2-rc3:
git://git.kernel.org/pub/scm/linux/kernel/git/paulmck/linux-rcu.git rcu/dev
Thanx, Paul
------------------------------------------------------------------------
b/drivers/base/cpu.c | 12 ++++++++ b/include/linux/cpu.h | 1 b/kernel/rcutorture.c | 4 +- b/kernel/rcutree.c | 18 +++++-------- b/kernel/rcutree.h | 1 b/kernel/rcutree_plugin.h | 14 ++++++++++ kernel/rcutree.c | 12 ++++---- kernel/rcutree_plugin.h | 62 ++++++++++++++++++++++++++++++++++++---------- 8 files changed, 92 insertions(+), 32 deletions(-)