Post RCU callbacks at early boot
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- v1 Latest7 patches 0 repliesNew
Patches in v1 No applies recorded yet
| # | Subject and files | Size | Replies | Applied |
|---|---|---|---|---|
| 1/7 | rcu: Abstract default callback-list initialization from init_callback_list()kernel/ | +14 | 0 replies | |
| 2/7 | rcu: Wire ->rda pointers at compile timekernel/ | +3 | 0 replies | |
| 3/7 | rcu: Prevent early-boot RCU callbacks from splattingkernel/ | +15 | 0 replies | |
| 4/7 | rcu: Refine diagnostics for lacking kthread for no-CBs callbackskernel/ | +2 | 0 replies | |
| 5/7 | rcu: Avoid clobbering early boot callbackskernel/ | +2 | 0 replies | |
| 6/7 | rcu: Move early-boot callbacks to no-CBs lists for no-CBs CPUskernel/ kernel/ | +13 | 0 replies | |
| 7/7 | rcu: Move early boot callback tests earlierkernel/ | +2 | 0 replies |
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Cover letter [PATCH tip/core/rcu 0/7] Post RCU callbacks at early boot
Hello!
This series, probably for v3.21, contains changes that allow RCU callbacks to be posted at very early boot, as in before rcu_init() is called. This was requested by the tracing folks. This series applies against tip/core/rcu, and probably not against current mainline.
The patches in this series are as follows:
1. Abstract initialization of callback lists.
2. Wire up the rcu_state structures' ->rda pointers at compile time.
3. Prevent early boot callbacks from splatting.
4. Refine diagnostics for lacking an rcuo kthread for no-CBs
CPUs that have callbacks posted.
5. Avoid clobbering lists of early boot callbacks.
6. Move early boot callbacks as needed by no-CBs CPUs.
7. Move early boot callbacks tests to beginning of rcu_init().
This passes modest rcutorture testing, but is probably missing a corner case or two.
Thanx, Paul
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b/kernel/rcu/tree.c | 52 ++++++++++++++++++++++++++++++++------------- b/kernel/rcu/tree_plugin.h | 27 ++++++++++++----------- 2 files changed, 51 insertions(+), 28 deletions(-)