Re: [PATCH] uprobe: Move arch_uprobe_optimize right after handlers execution

[Oleg Nesterov]

On 10/01, Jiri Olsa wrote:
>
> --- a/kernel/events/uprobes.c
> +++ b/kernel/events/uprobes.c
> @@ -2765,6 +2765,9 @@ static void handle_swbp(struct pt_regs *regs)
>  
>  	handler_chain(uprobe, regs);
>  
> +	/* Try to optimize after first hit. */
> +	arch_uprobe_optimize(&uprobe->arch, bp_vaddr);
> +
>  	/*
>  	 * If user decided to take execution elsewhere, it makes little sense
>  	 * to execute the original instruction, so let's skip it.
> @@ -2772,9 +2775,6 @@ static void handle_swbp(struct pt_regs *regs)
>  	if (instruction_pointer(regs) != bp_vaddr)
>  		goto out;
>  
> -	/* Try to optimize after first hit. */
> -	arch_uprobe_optimize(&uprobe->arch, bp_vaddr);
> -
>  	if (arch_uprobe_skip_sstep(&uprobe->arch, regs))
>  		goto out;

Acked-by: Oleg Nesterov <oleg@xxxxxxxxxx>