Re: [PATCH v10 07/36] function_graph: Allow multiple users to attach to function graph

On Fri, 24 May 2024 21:32:08 -0400 Steven Rostedt wrote: > On Tue, 7 May 2024 23:09:22 +0900 > "Masami Hiramatsu (Google)" wrote: > > > @@ -109,6 +244,21 @@ ftrace_push_return_trace(unsigned long ret, unsigned > > long func, > > if (!current->ret_stack) > > return -EBUSY; > >

Re: [PATCH v10 07/36] function_graph: Allow multiple users to attach to function graph

On Tue, 7 May 2024 23:09:22 +0900 "Masami Hiramatsu (Google)" wrote: > @@ -109,6 +244,21 @@ ftrace_push_return_trace(unsigned long ret, unsigned > long func, > if (!current->ret_stack) > return -EBUSY; > > + /* > + * At first, check whether the previous fgraph

[PATCH v10 07/36] function_graph: Allow multiple users to attach to function graph

From: Steven Rostedt (VMware) Allow for multiple users to attach to function graph tracer at the same time. Only 16 simultaneous users can attach to the tracer. This is because there's an array that stores the pointers to the attached fgraph_ops. When a function being traced is entered, each of