On Thu, 6 Jun 2019 19:59:18 -0700
Andrii Nakryiko [off-list ref] wrote:
On Thu, Jun 6, 2019 at 1:17 PM Matt Mullins [off-list ref] wrote:
quoted
BPF_PROG_TYPE_RAW_TRACEPOINTs can be executed nested on the same CPU, as
they do not increment bpf_prog_active while executing.
This enables three levels of nesting, to support
- a kprobe or raw tp or perf event,
- another one of the above that irq context happens to call, and
- another one in nmi context
Can NMIs be nested?
No, otherwise several things in the kernel will break.
-- Steve