From 9cc63f8bcd560c760d0b12e15bba8f81c86237cf Mon Sep 17 00:00:00 2001 From: "Paul E. McKenney" Date: Fri, 14 Aug 2026 15:43:51 -0700 Subject: Merge branches 'expcb.2026.07.24a', 'misc.2026.07.30a', 'rcu-tasks.2026.07.30a', 'srcu.2026.08.11a' and 'torture.2026.08.14a' into HEAD Changes: Make expedited grace periods expedite normal RCU callbacks Miscellaneous fixes: * Improve diagnostic output with character task states. * Mark accesses to inform KCSAN of concurrency design. * Move from kmalloc() to kmalloc_obj(). * Documentation updates. * Improve handling of RCU deferred quiescent states. * Clean up unused function arguments and structure fields. * Reduce show_rcu_gp_kthreads() stack space. Tasks RCU updates: * Clean up after SRCU re-implementation of Tasks Trace RCU. * Mark accesses to inform KCSAN of concurrency design. * Add ->lazy_timer status to diagnostic output. * Remove an unnecessary memory barrier. * Fix a data race, courtesy of KCSAN. * Documentation updates. * Convert cond_resched_tasks_rcu_qs() from macro to static inline function. SRCU updates: * Add Rust helpers for SRCU. * Avoid losing queued work at cleanup_srcu_struct() time. Torture-test updates: * Preparation work for immediate RCU priority deboosting. * Test RCU readers from real interrupt handlers (as opposed to softirq). * Simplify code through use of cpumask_next_wrap(). * Improve diagnostic output with character task states. * Add rcutorture.nwriters parameter to allow lightweight stall testing, and rcutorture.stall_only to make doing so easier. * Test an RCU Tasks Trace grace period implying an RCU grace period. * Make RCU Tasks Trace torturing track reader batches. * Fix a data race, courtesy of KCSAN. * Plug a shuffle_tmp_mask memory leak on kthread spawn failure. --- tools/perf/util/trace.h | 38 ++++++++++++++++++++++++++++++++++++++ 1 file changed, 38 insertions(+) create mode 100644 tools/perf/util/trace.h (limited to 'tools/perf/util/trace.h') diff --git a/tools/perf/util/trace.h b/tools/perf/util/trace.h new file mode 100644 index 000000000..fbbcfe6f4 --- /dev/null +++ b/tools/perf/util/trace.h @@ -0,0 +1,38 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +#ifndef UTIL_TRACE_H +#define UTIL_TRACE_H + +#include /* for FILE */ + +enum trace_summary_mode { + SUMMARY__NONE = 0, + SUMMARY__BY_TOTAL, + SUMMARY__BY_THREAD, + SUMMARY__BY_CGROUP, +}; + +#ifdef HAVE_BPF_SKEL + +int trace_prepare_bpf_summary(enum trace_summary_mode mode); +void trace_start_bpf_summary(void); +void trace_end_bpf_summary(void); +int trace_print_bpf_summary(FILE *fp, int max_summary); +void trace_cleanup_bpf_summary(void); + +#else /* !HAVE_BPF_SKEL */ + +static inline int trace_prepare_bpf_summary(enum trace_summary_mode mode __maybe_unused) +{ + return -1; +} +static inline void trace_start_bpf_summary(void) {} +static inline void trace_end_bpf_summary(void) {} +static inline int trace_print_bpf_summary(FILE *fp __maybe_unused, int max_summary __maybe_unused) +{ + return 0; +} +static inline void trace_cleanup_bpf_summary(void) {} + +#endif /* HAVE_BPF_SKEL */ + +#endif /* UTIL_TRACE_H */ -- cgit v1.3.1