On Mon, 22 Jan 2024 15:36:29 +0800 George Guo <dongtai.guo@xxxxxxxxx> wrote: > From: George Guo <guodongtai@xxxxxxxxxx> > > Add do_warn, warn_limit fields to the output of the > percpu_alloc_percpu_fail ftrace event. > > This is required to percpu_alloc failed with no warning showing. You mean to state; In order to know why percpu_alloc failed but produces no warnings, the do_warn and warn_limit should be traced to let the user know it was rate-limited. Or something like that? Honestly, I don't think that the trace event is the proper place to do that. The trace event just shows that it did fail. If you are confused to why it doesn't print to dmesg, then you can simply add a kprobe to see those values as well. -- Steve > > Signed-off-by: George Guo <guodongtai@xxxxxxxxxx> > ---
