Re: [PATCH net-next 3/3] bpf: avoid stack copy and use skb ctx for event output

Hi Daniel, On Wed, Jul 13, 2016 at 01:45:47AM +0200, Daniel Borkmann wrote: On 07/13/2016 01:25 AM, kbuild test robot wrote: Hi, [auto build test WARNING on net-next/master] url: https://github.com/0day-ci/linux/commits/Daniel-Borkmann/BPF-event-output-helper-improvements/20160713-065944

Re: [PATCH net-next 3/3] bpf: avoid stack copy and use skb ctx for event output

On 07/13/2016 01:25 AM, kbuild test robot wrote: Hi, [auto build test WARNING on net-next/master] url: https://github.com/0day-ci/linux/commits/Daniel-Borkmann/BPF-event-output-helper-improvements/20160713-065944 config: s390-allyesconfig (attached as .config) compiler: s390x-linux-gnu-gcc

Re: [PATCH net-next 3/3] bpf: avoid stack copy and use skb ctx for event output

Hi, [auto build test WARNING on net-next/master] url: https://github.com/0day-ci/linux/commits/Daniel-Borkmann/BPF-event-output-helper-improvements/20160713-065944 config: s390-allyesconfig (attached as .config) compiler: s390x-linux-gnu-gcc (Debian 5.3.1-8) 5.3.1 20160205 reproduce:

[PATCH net-next 3/3] bpf: avoid stack copy and use skb ctx for event output

This work improves bpf_skb_event_output() helper in two ways, i) it avoids that users need to unnecessary extract sampled skb data to stack first via bpf_skb_load_bytes() and then copy once again into the ring buffer slot, and ii) it avoids that only portions can be sampled with bpf_skb_load_bytes(