Re: [PATCH RFC net-next] tracing: accelerate tracing filters with BPF

[Alexei Starovoitov]

On Tue, May 13, 2014 at 8:17 PM, Steven Rostedt <rostedt@xxxxxxxxxxx> wrote:
> On Tue, 13 May 2014 19:55:11 -0700
> Alexei Starovoitov <ast@xxxxxxxxxxxx> wrote:
>
>> Tracing filters are parsing user supplied character string and constructing
>> a predicate tree. filter_match_preds() was used to walk nodes of the tree to
>> simulate matching of boolean expression.
>>
>
> I applied this on top of net-next, from:
>
>  git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next.git
>  (master branch)
>
> and got this compile error:

Sorry I wasn't clear in the log.
This patch depends on JIT patches that were posted separately.
Since this one is RFC, I didn't want to mix them.
JIT patches:
http://patchwork.ozlabs.org/patch/348558/
http://patchwork.ozlabs.org/patch/348559/
http://patchwork.ozlabs.org/patch/348560/

> kernel/trace/trace_events_filter.c: In function âemit_condâ:
> kernel/trace/trace_events_filter.c:1361:36: error: â__bpf_call_baseâ undeclared (first use in this function)
> kernel/trace/trace_events_filter.c:1361:36: note: each undeclared identifier is reported only once for each function it appears in
> kernel/trace/trace_events_filter.c: In function âfilter_gen_bpfâ:
> kernel/trace/trace_events_filter.c:1622:2: error: implicit declaration of function âbpf_int_jit_compileâ [-Werror=implicit-function-declaration]
>
> Config attached.
>
> -- Steve
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