Re: [PATCH bpf-next v2 1/3] bpf: implement bpf_send_signal() helper

2019-05-24 Thread Daniel Borkmann
On 05/24/2019 01:54 AM, Yonghong Song wrote: > > > On 5/23/19 4:08 PM, Daniel Borkmann wrote: >> On 05/23/2019 11:30 PM, Yonghong Song wrote: >>> On 5/23/19 2:07 PM, Yonghong Song wrote: On 5/23/19 9:28 AM, Daniel Borkmann wrote: > On 05/23/2019 05:58 PM, Yonghong Song wrote: >> On 5

Re: [PATCH bpf-next v2 1/3] bpf: implement bpf_send_signal() helper

2019-05-23 Thread Yonghong Song
On 5/23/19 4:08 PM, Daniel Borkmann wrote: > On 05/23/2019 11:30 PM, Yonghong Song wrote: >> On 5/23/19 2:07 PM, Yonghong Song wrote: >>> On 5/23/19 9:28 AM, Daniel Borkmann wrote: On 05/23/2019 05:58 PM, Yonghong Song wrote: > On 5/23/19 8:41 AM, Daniel Borkmann wrote: >> On 05/22/2

Re: [PATCH bpf-next v2 1/3] bpf: implement bpf_send_signal() helper

2019-05-23 Thread Daniel Borkmann
On 05/23/2019 11:30 PM, Yonghong Song wrote: > On 5/23/19 2:07 PM, Yonghong Song wrote: >> On 5/23/19 9:28 AM, Daniel Borkmann wrote: >>> On 05/23/2019 05:58 PM, Yonghong Song wrote: On 5/23/19 8:41 AM, Daniel Borkmann wrote: > On 05/22/2019 07:39 AM, Yonghong Song wrote: >> This patch

Re: [PATCH bpf-next v2 1/3] bpf: implement bpf_send_signal() helper

2019-05-23 Thread Yonghong Song
On 5/23/19 2:07 PM, Yonghong Song wrote: > > > On 5/23/19 9:28 AM, Daniel Borkmann wrote: >> On 05/23/2019 05:58 PM, Yonghong Song wrote: >>> On 5/23/19 8:41 AM, Daniel Borkmann wrote: On 05/22/2019 07:39 AM, Yonghong Song wrote: > This patch tries to solve the following specific use c

Re: [PATCH bpf-next v2 1/3] bpf: implement bpf_send_signal() helper

2019-05-23 Thread Yonghong Song
On 5/23/19 9:28 AM, Daniel Borkmann wrote: > On 05/23/2019 05:58 PM, Yonghong Song wrote: >> On 5/23/19 8:41 AM, Daniel Borkmann wrote: >>> On 05/22/2019 07:39 AM, Yonghong Song wrote: This patch tries to solve the following specific use case. Currently, bpf program can already col

Re: [PATCH bpf-next v2 1/3] bpf: implement bpf_send_signal() helper

2019-05-23 Thread Daniel Borkmann
On 05/23/2019 05:58 PM, Yonghong Song wrote: > On 5/23/19 8:41 AM, Daniel Borkmann wrote: >> On 05/22/2019 07:39 AM, Yonghong Song wrote: >>> This patch tries to solve the following specific use case. >>> >>> Currently, bpf program can already collect stack traces >>> through kernel function get_pe

Re: [PATCH bpf-next v2 1/3] bpf: implement bpf_send_signal() helper

2019-05-23 Thread Yonghong Song
On 5/23/19 8:41 AM, Daniel Borkmann wrote: > On 05/22/2019 07:39 AM, Yonghong Song wrote: >> This patch tries to solve the following specific use case. >> >> Currently, bpf program can already collect stack traces >> through kernel function get_perf_callchain() >> when certain events happens (e.g

Re: [PATCH bpf-next v2 1/3] bpf: implement bpf_send_signal() helper

2019-05-23 Thread Daniel Borkmann
On 05/22/2019 07:39 AM, Yonghong Song wrote: > This patch tries to solve the following specific use case. > > Currently, bpf program can already collect stack traces > through kernel function get_perf_callchain() > when certain events happens (e.g., cache miss counter or > cpu clock counter overfl