于 2015/10/23 23:12, Peter Zijlstra 写道:
> On Fri, Oct 23, 2015 at 02:52:11PM +0200, Peter Zijlstra wrote:
>> On Thu, Oct 22, 2015 at 06:28:22PM +0800, Wangnan (F) wrote:
>>> information to analysis when glitch happen. Another way we are trying to
>>> implement
>>> now is to dynamically turn events o
于 2015/10/21 17:12, Peter Zijlstra 写道:
> On Tue, Oct 20, 2015 at 03:53:02PM -0700, Alexei Starovoitov wrote:
>> On 10/20/15 12:22 AM, Kaixu Xia wrote:
>>> diff --git a/kernel/events/core.c b/kernel/events/core.c
>>> index b11756f..5219635 100644
>>> --- a/kernel/events/core.c
>>> +++ b/kernel/event
于 2015/10/20 10:14, Alexei Starovoitov 写道:
> On 10/19/15 3:37 AM, Kaixu Xia wrote:
>> +/* flags for PERF_EVENT_ARRAY maps*/
>> +enum {
>> +BPF_EVENT_CTL_BIT_CUR = 0,
>> +BPF_EVENT_CTL_BIT_ALL = 1,
>> +__NR_BPF_EVENT_CTL_BITS,
>> +};
>> +
>> +#defineBPF_CTL_BIT_FLAG_MASK \
>> +((
于 2015/10/17 6:06, Alexei Starovoitov 写道:
> On 10/16/15 12:42 AM, Kaixu Xia wrote:
>> This patch adds the flag dump_enable to control the trace data
>> output process when perf sampling. By setting this flag and
>> integrating with ebpf, we can control the data output process and
>> get the samples
于 2015/10/17 6:06, Alexei Starovoitov 写道:
> On 10/16/15 12:42 AM, Kaixu Xia wrote:
>> This patch adds the flag dump_enable to control the trace data
>> output process when perf sampling. By setting this flag and
>> integrating with ebpf, we can control the data output process and
>> get the samples
于 2015/10/15 5:28, Alexei Starovoitov 写道:
> On 10/14/15 5:37 AM, Kaixu Xia wrote:
>> +event->p_sample_disable = &enabler_event->sample_disable;
>
> I don't like it as a concept and it's buggy implementation.
> What happens here when enabler is alive, but other event is destroyed?
>
>> --- a/k
于 2015/10/13 3:20, Alexei Starovoitov 写道:
> On 10/12/15 2:02 AM, Kaixu Xia wrote:
>> diff --git a/include/linux/bpf.h b/include/linux/bpf.h
>> index f57d7fe..25e073d 100644
>> --- a/include/linux/bpf.h
>> +++ b/include/linux/bpf.h
>> @@ -39,6 +39,7 @@ struct bpf_map {
>> u32 max_entries;
>>
于 2015/8/11 16:24, Daniel Borkmann 写道:
> On 08/11/2015 08:53 AM, Kaixu Xia wrote:
>> There is a build error that "'struct bpf_array' has no member
>> named 'prog'" on s390. In commit 2a36f0b, the member 'prog' of
>> struct bpf_array is replaced by 'ptrs'. So this patch fixes it.
>>
>> Signed-off-by
于 2015/8/5 21:53, Peter Zijlstra 写道:
> On Wed, Aug 05, 2015 at 12:04:25PM +0200, Peter Zijlstra wrote:
>> Also, you probably want a WARN_ON(in_nmi()) there, this function is
>> _NOT_ NMI safe.
>
> I had a wee think about that, and I think the below is safe.
>
> (with the obvious problem that WARN
于 2015/8/5 18:04, Peter Zijlstra 写道:
> On Tue, Aug 04, 2015 at 08:58:15AM +, Kaixu Xia wrote:
>> diff --git a/kernel/events/core.c b/kernel/events/core.c
>> index 6251b53..726ca1b 100644
>> --- a/kernel/events/core.c
>> +++ b/kernel/events/core.c
>> @@ -8599,6 +8599,25 @@ struct perf_event_attr
于 2015/8/5 1:55, Alexei Starovoitov 写道:
> On 8/4/15 1:58 AM, Kaixu Xia wrote:
>> +static int check_func_limit(struct bpf_map **mapp, int func_id)
>
> how about 'check_map_func_compatibility' or 'check_map_func_affinity' ?
>
>> +{
>> +struct bpf_map *map = *mapp;
>
> why pass pointer to a poi
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