Function report

Linux Kernel

v5.5.9

Brick Technologies Co., Ltd

Source Code:kernel\events\core.c Create Date:2022-07-28 13:41:36
Last Modify:2022-05-20 07:50:19 Copyright©Brick
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Name:Creates the child task context and tries to inherit the event-group.* Clears @inherited_all on !attr.inherited or error. Note that we'll leave* inherited_all set when we 'fail' to inherit an orphaned event; this is

Proto:static int inherit_task_group(struct perf_event *event, struct task_struct *parent, struct perf_event_context *parent_ctx, struct task_struct *child, int ctxn, int *inherited_all)

Type:int

Parameter:

TypeParameterName
struct perf_event *event
struct task_struct *parent
struct perf_event_context *parent_ctx
struct task_struct *child
intctxn
int *inherited_all
12227  If Not inherit Then
12228  inherited_all = 0
12229  Return 0
12232  child_ctx = perf_event_ctxp[ctxn]
12233  If Not child_ctx Then
12240  child_ctx = alloc_perf_context(pmu, child)
12241  If Not child_ctx Then Return -ENOMEM
12244  perf_event_ctxp[ctxn] = child_ctx
12247  ret = Inherits an event group.* This will quietly suppress orphaned events; !inherit_event() is not an error.* This matches with perf_event_release_kernel() removing all child events.* Returns:* - 0 on success* - <0 on error
12250  If ret Then inherited_all = 0
12253  Return ret
Caller
NameDescribe
perf_event_init_contextInitialize the perf_event context in task_struct