From 909a3f0e9d8b0d8001cf6e99808f88eca8e44328 Mon Sep 17 00:00:00 2001 From: Cheng Lingfei Date: Mon, 24 Aug 2026 20:45:46 +0800 Subject: docs: cgroup-v2: fix misc.events key format description MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit In misc cgroup, misc.events does not output a simple "max" key. Instead, each registered misc resource outputs a separate key suffixed with ".max" (i.e., ".max"). Update the documentation to clarify that the entry key is ".max". Suggested-by: Michal Koutný Signed-off-by: Cheng Lingfei Signed-off-by: Tejun Heo --- include/trace/events/ipi.h | 136 +++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 136 insertions(+) create mode 100644 include/trace/events/ipi.h (limited to 'include/trace/events/ipi.h') diff --git a/include/trace/events/ipi.h b/include/trace/events/ipi.h new file mode 100644 index 000000000..fae4f8eac --- /dev/null +++ b/include/trace/events/ipi.h @@ -0,0 +1,136 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +#undef TRACE_SYSTEM +#define TRACE_SYSTEM ipi + +#if !defined(_TRACE_IPI_H) || defined(TRACE_HEADER_MULTI_READ) +#define _TRACE_IPI_H + +#include + +TRACE_EVENT(ipi_send_cpu, + + TP_PROTO(const unsigned int cpu, unsigned long callsite, void *callback), + + TP_ARGS(cpu, callsite, callback), + + TP_STRUCT__entry( + __field(unsigned int, cpu) + __field(void *, callsite) + __field(void *, callback) + ), + + TP_fast_assign( + __entry->cpu = cpu; + __entry->callsite = (void *)callsite; + __entry->callback = callback; + ), + + TP_printk("cpu=%u callsite=%pS callback=%pS", + __entry->cpu, __entry->callsite, __entry->callback) +); + +TRACE_EVENT(ipi_send_cpumask, + + TP_PROTO(const struct cpumask *cpumask, unsigned long callsite, void *callback), + + TP_ARGS(cpumask, callsite, callback), + + TP_STRUCT__entry( + __cpumask(cpumask) + __field(void *, callsite) + __field(void *, callback) + ), + + TP_fast_assign( + __assign_cpumask(cpumask, cpumask_bits(cpumask)); + __entry->callsite = (void *)callsite; + __entry->callback = callback; + ), + + TP_printk("cpumask=%s callsite=%pS callback=%pS", + __get_cpumask(cpumask), __entry->callsite, __entry->callback) +); + +#ifdef CONFIG_HAVE_EXTRA_IPI_TRACEPOINTS +/** + * ipi_raise - called when a smp cross call is made + * + * @mask: mask of recipient CPUs for the IPI + * @reason: string identifying the IPI purpose + * + * It is necessary for @reason to be a static string declared with + * __tracepoint_string. + */ +TRACE_EVENT(ipi_raise, + + TP_PROTO(const struct cpumask *mask, const char *reason), + + TP_ARGS(mask, reason), + + TP_STRUCT__entry( + __cpumask(target_cpus) + __field(const char *, reason) + ), + + TP_fast_assign( + __assign_cpumask(target_cpus, cpumask_bits(mask)); + __entry->reason = reason; + ), + + TP_printk("target_mask=%s (%s)", __get_cpumask(target_cpus), __entry->reason) +); + +DECLARE_EVENT_CLASS(ipi_handler, + + TP_PROTO(const char *reason), + + TP_ARGS(reason), + + TP_STRUCT__entry( + __field(const char *, reason) + ), + + TP_fast_assign( + __entry->reason = reason; + ), + + TP_printk("(%s)", __entry->reason) +); + +/** + * ipi_entry - called immediately before the IPI handler + * + * @reason: string identifying the IPI purpose + * + * It is necessary for @reason to be a static string declared with + * __tracepoint_string, ideally the same as used with trace_ipi_raise + * for that IPI. + */ +DEFINE_EVENT(ipi_handler, ipi_entry, + + TP_PROTO(const char *reason), + + TP_ARGS(reason) +); + +/** + * ipi_exit - called immediately after the IPI handler returns + * + * @reason: string identifying the IPI purpose + * + * It is necessary for @reason to be a static string declared with + * __tracepoint_string, ideally the same as used with trace_ipi_raise for + * that IPI. + */ +DEFINE_EVENT(ipi_handler, ipi_exit, + + TP_PROTO(const char *reason), + + TP_ARGS(reason) +); +#endif /* CONFIG_HAVE_EXTRA_IPI_TRACEPOINTS */ + +#endif /* _TRACE_IPI_H */ + +/* This part must be outside protection */ +#include -- cgit v1.3.1