Re: trace_printk


Yonghong Song
 

No, this can still be used. The warning just tells you this should
mostly be used in debug mode.

On Wed, Mar 28, 2018 at 11:59 AM, Saran Kumar Krishnan via iovisor-dev
<iovisor-dev@...> wrote:
Hi -


When I use bpf_trace_printk - I am getting this NOTICE. Does it mean, that
eBPF shouldn't be used in the production kernel.



Mar 20 12:26:44 lenovo-e565 kernel: [ 267.467518]
**********************************************************
Mar 20 12:26:44 lenovo-e565 kernel: [ 267.467518] ** NOTICE NOTICE NOTICE
NOTICE NOTICE NOTICE NOTICE **
Mar 20 12:26:44 lenovo-e565 kernel: [ 267.467518] **
**
Mar 20 12:26:44 lenovo-e565 kernel: [ 267.467519] ** trace_printk() being
used. Allocating extra memory. **
Mar 20 12:26:44 lenovo-e565 kernel: [ 267.467519] **
**
Mar 20 12:26:44 lenovo-e565 kernel: [ 267.467520] ** This means that this
is a DEBUG kernel and it is **
Mar 20 12:26:44 lenovo-e565 kernel: [ 267.467520] ** unsafe for production
use. **
Mar 20 12:26:44 lenovo-e565 kernel: [ 267.467520] **
**
Mar 20 12:26:44 lenovo-e565 kernel: [ 267.467521] ** If you see this
message and you are not debugging **
Mar 20 12:26:44 lenovo-e565 kernel: [ 267.467522] ** the kernel, report
this immediately to your vendor! **
Mar 20 12:26:44 lenovo-e565 kernel: [ 267.467522] **
**
Mar 20 12:26:44 lenovo-e565 kernel: [ 267.467522] ** NOTICE NOTICE NOTICE
NOTICE NOTICE NOTICE NOTICE **
Mar 20 12:26:44 lenovo-e565 kernel: [ 267.467523]
**********************************************************



Regards
Saran



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