On Mon, 29 Apr 2019 11:59:04 -0700 Linus Torvalds <torva...@linux-foundation.org> wrote:
> I really don't care. Just do what I suggested, and if you have numbers to > show problems, then maybe I'll care. > Are you suggesting that I rewrite the code to do it one function at a time? This has always been batch mode. This is not something new. The function tracer has been around longer than the text poke code. > Right now you're just making excuses for this. I described the solution > months ago, now I've written a patch, if that's not good enough then we can > just skip this all entirely. > > Honestly, if you need to rewrite tens of thousands of calls, maybe you're > doing something wrong? > # cd /sys/kernel/debug/tracing # cat available_filter_functions | wc -l 45856 # cat enabled_functions | wc -l 0 # echo function > current_tracer # cat enabled_functions | wc -l 45856 There, I just enabled 45,856 function call sites in one shot! How else do you want to update them? Every function in the kernel has a nop, that turns into a call to the ftrace_handler, if I add another user of that code, it will change each one as well. -- Steve
