CPU-hotplug updates for 4.2
Status from this message: Queued for 4.2. Thanks.
Get series with b4
b4 am [email protected]Versions newest first
Patches in v1 Applied
| # | Subject and files | Size | Replies | Applied |
|---|---|---|---|---|
| 1/9 | rcu: Eliminate HOTPLUG_CPU #ifdef in favor of IS_ENABLED()kernel/ | +14 | 0 replies | |
| 2/9 | rcu: Adjust ->lock acquisition for tasks no longer migratingkernel/ | +6 | 0 replies | |
| 3/9 | rcu: Remove dead code from force_qs_rnp()kernel/ | +0 | 0 replies | |
| 4/9 | rcu: Remove redundant offline checkkernel/ | +0 | 0 replies | |
| 5/9 | rcu: Correctly initialize ->rcu_qs_ctr_snap at online timekernel/ | +1 | 0 replies | |
| 6/9 | cpu: Handle smpboot_unpark_threads() uniformlykernel/ | +1 | 0 replies | |
| 7/9 | arm64: Use common outgoing-CPU-notification codearch/ | +2 | 4 replies | |
| 8/9 | arm: Use common outgoing-CPU-notification codearch/ | +2 | 1 reply | |
| 9/9 | cpu: Remove new instance of __cpuinit that crept back inkernel/ | +1 | 0 replies |
Reviews trailers per patch
1 of 9 patches has a Reviewed-by or Acked-by.
| Patch | Will Deacon | Geert Uytterhoeven |
|---|---|---|
| 1/9 | ||
| 2/9 | ||
| 3/9 | ||
| 4/9 | ||
| 5/9 | ||
| 6/9 | ||
| 7/9 | A-b | |
| 8/9 | T-b | |
| 9/9 |
Trailers given in replies are filled; those carried in the patches from earlier versions are outlined with dashes.
Cover letter [PATCH tip/core/rcu 0/9] CPU-hotplug updates for 4.2
Hello!
The following series improves RCU's handling of CPU hotplug. It also contains a couple of ARM placeholder patches in case someone gets caught out by tighter diagnostics.
1. Eliminate a HOTPLUG_CPU #ifdef in favor of IS_ENABLED()
2. Adjust rcu_read_unlock_special()'s acquisition of the
task's lock to start allowing for the fact that blocked tasks are no longer migrated to the root rcu_node structure. If the warning does not trigger, a later patch will eliminate the loop.
3. Rmove dead code from force_qs_rnp().
4. Remove redundant offline check.
5. Correctly initialize ->rcu_qs_ctr_snap at online time to get the
code out of its current "working by accident" state.
6. Move smpboot_unpark_threads() handling into a notifier for
uniformity.
7. [Placeholder for ARM64] Use common code for ARM64 CPU-offline
notification.
8. [Placeholder for ARM] Use common code for ARM CPU-offline
notification.
9. Remove extraneous __cpuinit, courtesy of Paul Gortmaker.
Thanx, Paul
------------------------------------------------------------------------
b/arch/arm/kernel/smp.c | 6 +---- b/arch/arm64/kernel/smp.c | 6 +---- b/kernel/cpu.c | 4 +-- b/kernel/rcu/tree.c | 47 ++++++++++++++------------------------------- b/kernel/rcu/tree_plugin.h | 9 +++++--- 5 files changed, 27 insertions(+), 45 deletions(-)