diff options
| author | Paul E. McKenney <paulmck@kernel.org> | 2025-12-29 11:10:58 -0800 |
|---|---|---|
| committer | Boqun Feng <boqun.feng@gmail.com> | 2026-01-01 16:39:46 +0800 |
| commit | a73fc3dcc60b6d7a2075e2fbdca64fd53600f855 (patch) | |
| tree | 58c726e470f4f6c82f9c47f8283ee6eebf5d81e3 /Documentation/admin-guide | |
| parent | 46e323599911ddd3368c9993a0572c9876a82ce8 (diff) | |
rcu: Clean up after the SRCU-fastification of RCU Tasks Trace
Now that RCU Tasks Trace has been re-implemented in terms of SRCU-fast,
the ->trc_ipi_to_cpu, ->trc_blkd_cpu, ->trc_blkd_node, ->trc_holdout_list,
and ->trc_reader_special task_struct fields are no longer used.
In addition, the rcu_tasks_trace_qs(), rcu_tasks_trace_qs_blkd(),
exit_tasks_rcu_finish_trace(), and rcu_spawn_tasks_trace_kthread(),
show_rcu_tasks_trace_gp_kthread(), rcu_tasks_trace_get_gp_data(),
rcu_tasks_trace_torture_stats_print(), and get_rcu_tasks_trace_gp_kthread()
functions and all the other functions that they invoke are no longer used.
Also, the TRC_NEED_QS and TRC_NEED_QS_CHECKED CPP macros are no longer used.
Neither are the rcu_tasks_trace_lazy_ms and rcu_task_ipi_delay rcupdate
module parameters and the TASKS_TRACE_RCU_READ_MB Kconfig option.
This commit therefore removes all of them.
[ paulmck: Apply Alexei Starovoitov feedback. ]
Signed-off-by: Paul E. McKenney <paulmck@kernel.org>
Cc: Andrii Nakryiko <andrii@kernel.org>
Cc: Alexei Starovoitov <ast@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: bpf@vger.kernel.org
Reviewed-by: Joel Fernandes <joelagnelf@nvidia.com>
Signed-off-by: Boqun Feng <boqun.feng@gmail.com>
Diffstat (limited to 'Documentation/admin-guide')
| -rw-r--r-- | Documentation/admin-guide/kernel-parameters.txt | 15 |
1 files changed, 0 insertions, 15 deletions
diff --git a/Documentation/admin-guide/kernel-parameters.txt b/Documentation/admin-guide/kernel-parameters.txt index a8d0afde7f85..1b8e5cadbecb 100644 --- a/Documentation/admin-guide/kernel-parameters.txt +++ b/Documentation/admin-guide/kernel-parameters.txt @@ -6249,13 +6249,6 @@ Kernel parameters dynamically) adjusted. This parameter is intended for use in testing. - rcupdate.rcu_task_ipi_delay= [KNL] - Set time in jiffies during which RCU tasks will - avoid sending IPIs, starting with the beginning - of a given grace period. Setting a large - number avoids disturbing real-time workloads, - but lengthens grace periods. - rcupdate.rcu_task_lazy_lim= [KNL] Number of callbacks on a given CPU that will cancel laziness on that CPU. Use -1 to disable @@ -6299,14 +6292,6 @@ Kernel parameters of zero will disable batching. Batching is always disabled for synchronize_rcu_tasks(). - rcupdate.rcu_tasks_trace_lazy_ms= [KNL] - Set timeout in milliseconds RCU Tasks - Trace asynchronous callback batching for - call_rcu_tasks_trace(). A negative value - will take the default. A value of zero will - disable batching. Batching is always disabled - for synchronize_rcu_tasks_trace(). - rcupdate.rcu_self_test= [KNL] Run the RCU early boot self tests |