Re: [PATCH] ebpf, events: make it actually more configurable

From: Ingo Molnar
Date: Sat Oct 03 2015 - 02:37:23 EST



* Daniel Borkmann <daniel@xxxxxxxxxxxxx> wrote:

> While testing some other BPF issue, I realized that BPF_EVENTS is
> actually not accessible through menuconfig because of a missing
> description that needs to be attached to the bool. After the patch
> the entry shows up in menuconfig and can be enabled/disabled from
> there.

Yeah, so the principle is the following: the main configuration option for it is
BPF_SYSCALL. The BPF_EVENTS is an internal detail, always enabled when possible,
and we make it so that if the BPF syscall is enabled, we'll enable the perf
integration if all the must-have components are in place:

> depends on KPROBE_EVENT || UPROBE_EVENT
> default y

So this is intentional.

Unless your suggestion is to also enable it when neither KPROBE_EVENT nor
UPROBE_EVENT are defined. Does that make sense?

Thanks,

Ingo
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