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Date: Wed, 9 Sep 2015 11:10:13 +0900 From: Takao Indoh <indou.takao@...fujitsu.com> To: <alexander.shishkin@...ux.intel.com>, <tglx@...utronix.de>, <mingo@...hat.com>, <hpa@...or.com>, <a.p.zijlstra@...llo.nl>, <acme@...nel.org>, <vgoyal@...hat.com>, <rostedt@...dmis.org> CC: <linux-kernel@...r.kernel.org>, <x86@...nel.org> Subject: Re: [PATCH v2 2/4] perf: Add function to enable perf events in kernel with ring buffer On 2015/09/08 18:32, Alexander Shishkin wrote: > Takao Indoh <indou.takao@...fujitsu.com> 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 > -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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