January 28, 2025 at 7:29 AM, "Masami Hiramatsu (Google)" <[email protected]> 
wrote:



> 
> From: Masami Hiramatsu (Google) <[email protected]>
> 
> Fix to remove ftrace_test_recursion_trylock() from ftrace_graph_func()
> 
> because commit d576aec24df9 ("fgraph: Get ftrace recursion lock in
> 
> function_graph_enter") has been moved it to function_graph_enter_regs()
> 
> already.
> 
> Reported-by: Jiri Olsa <[email protected]>
> 
> Closes: https://lore.kernel.org/all/Z5O0shrdgeExZ2kF@krava/
> 
> Fixes: d576aec24df9 ("fgraph: Get ftrace recursion lock in 
> function_graph_enter")
> 
> Signed-off-by: Masami Hiramatsu (Google) <[email protected]>
> 
> Tested-by: Jiri Olsa <[email protected]>
> 
> [...]

Hi Masami,

Can confirm this patch fixes missed/kprobe_recursion BPF selftests on s390x:
https://github.com/kernel-patches/vmtest/actions/runs/13021621468/job/36324248903

Tested-by: Ihor Solodrai <[email protected]>

Thanks!

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