| Message ID | ddf64299-de71-41a2-b575-56ec173faf75@paulmck-laptop (mailing list archive) |
|---|---|
| Headers | show |
| Series | SRCU-lite changes for v6.13 | expand |
On 10/15/2024 9:41 PM, Paul E. McKenney wrote: > Hello! > > This v3 series adds support and testing for srcu_read_lock_lite() > and srcu_read_unlock_lite(), which avoid smp_mb(), but add a couple of > synchronize_rcu() calls to the grace-period processing and may only be > used where RCU is watching. > > 1. Rename srcu_might_be_idle() to srcu_should_expedite(). > > 2. Introduce srcu_gp_is_expedited() helper function. > > 3. Renaming in preparation for additional reader flavor. > > 4. Bit manipulation changes for additional reader flavor. > > 5. Standardize srcu_data pointers to "sdp" and similar. > > 6. Improve srcu_read_lock{,_nmisafe}() comments. > > 7. Create CPP macros for normal and NMI-safe SRCU readers. > > 8. Add srcu_read_lock_lite() and srcu_read_unlock_lite(). > > 9. Allow inlining of __srcu_read_{,un}lock_lite(). > > 10. Expand RCUTORTURE_RDR_MASK_[12] to eight bits. > > 11. Add reader_flavor parameter for SRCU readers. > > 12. Add srcu_read_lock_lite() support to rcutorture.reader_flavor. > > 13. Add light-weight SRCU scenario. > > 14. Add srcu_read_lock_lite() support using "srcu-lite". > > 15. Improve srcu_read_lock_lite() kernel-doc comment. > > Changes since v2: > > o Apply acked-by tag. > > o Split commit per Neeraj Upadhyay feedback. > > Changes since v1: > > o Apply reviewed-by tag. > > o Link to performance data. > > o Add commit improving kernel-doc comment. > > o Pull out into separate branch to avoid dependency on an otherwise > unrelated refscale commit. > > Thanx, Paul > > ------------------------------------------------------------------------ > For this series: Reviewed-by: Neeraj Upadhyay <Neeraj.Upadhyay@amd.com> - Neeraj
Hello! This v3 series adds support and testing for srcu_read_lock_lite() and srcu_read_unlock_lite(), which avoid smp_mb(), but add a couple of synchronize_rcu() calls to the grace-period processing and may only be used where RCU is watching. 1. Rename srcu_might_be_idle() to srcu_should_expedite(). 2. Introduce srcu_gp_is_expedited() helper function. 3. Renaming in preparation for additional reader flavor. 4. Bit manipulation changes for additional reader flavor. 5. Standardize srcu_data pointers to "sdp" and similar. 6. Improve srcu_read_lock{,_nmisafe}() comments. 7. Create CPP macros for normal and NMI-safe SRCU readers. 8. Add srcu_read_lock_lite() and srcu_read_unlock_lite(). 9. Allow inlining of __srcu_read_{,un}lock_lite(). 10. Expand RCUTORTURE_RDR_MASK_[12] to eight bits. 11. Add reader_flavor parameter for SRCU readers. 12. Add srcu_read_lock_lite() support to rcutorture.reader_flavor. 13. Add light-weight SRCU scenario. 14. Add srcu_read_lock_lite() support using "srcu-lite". 15. Improve srcu_read_lock_lite() kernel-doc comment. Changes since v2: o Apply acked-by tag. o Split commit per Neeraj Upadhyay feedback. Changes since v1: o Apply reviewed-by tag. o Link to performance data. o Add commit improving kernel-doc comment. o Pull out into separate branch to avoid dependency on an otherwise unrelated refscale commit. Thanx, Paul ------------------------------------------------------------------------ Documentation/admin-guide/kernel-parameters.txt | 4 b/Documentation/admin-guide/kernel-parameters.txt | 8 b/include/linux/srcu.h | 21 - b/include/linux/srcutree.h | 2 b/kernel/rcu/rcutorture.c | 28 - b/kernel/rcu/refscale.c | 51 ++ b/kernel/rcu/srcutree.c | 16 b/tools/testing/selftests/rcutorture/configs/rcu/CFLIST | 1 b/tools/testing/selftests/rcutorture/configs/rcu/SRCU-L | 10 b/tools/testing/selftests/rcutorture/configs/rcu/SRCU-L.boot | 3 b/tools/testing/selftests/rcutorture/configs/rcu/SRCU-N.boot | 1 b/tools/testing/selftests/rcutorture/configs/rcu/TREE10 | 2 include/linux/srcu.h | 89 +++- include/linux/srcutree.h | 44 ++ kernel/rcu/rcutorture.c | 37 + kernel/rcu/srcutree.c | 207 ++++++----- 16 files changed, 363 insertions(+), 161 deletions(-)