Re: [PATCH v2 2/4] perf: Add function to enable perf events in kernel with ring buffer

[Takao Indoh]

On 2015/09/08 18:32, Alexander Shishkin wrote:
> Takao Indoh <indou.takao@xxxxxxxxxxxxxx> writes:
> 
>> perf_event_create_kernel_counter is used to enable perf events in kernel
>> without buffer for logging its events. This patch add new fucntion which
>> enable perf events with ring buffer. Intel PT logger uses this to enable
>> Intel PT and some associated events with its log buffer.
> 
> Have you seen [1] and related patches? I haven't gotten around to
> updating them yet, but hopefully it's going to happen soon.
> 
> The problem is that for such api to work, this memory needs to be
> accounted, especially when you start handling event inheritance. For
> system crash dump it doesn't really matter, but I also need a similar
> api for per-task core dumps, for example.

I have not seen this, I'll check it. You or someone else are working on
api for process core dump?

Thanks,
Takao Indoh

> 
> [1] https://lkml.org/lkml/2014/10/13/290
> 
> Thanks,
> --
> Alex
> 


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