On Thu, 2 Jan 2025 21:24:04 +0100 Peter Zijlstra <peterz@xxxxxxxxxxxxx> wrote: > It is not. If kallsyms is fixed, you can use that to tell which > fentry/mcount sites are 'invalid'. I can't use kallsyms for valid tests at boot up. Even with a binary search, it's still rather slow. The ftrace table is created at early boot, even before scheduling (it's needed before you can enable boot time function tracing), so any slow down in creating that table slows down the boot, and people will notice. -- Steve
