linux-kernel - Re: [PATCH 0/7] [RFC] kernel: add a netlink interface to get information about processes

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Message-ID: <20150227215015.GD28401@kernel.org>
Date:	Fri, 27 Feb 2015 18:50:15 -0300
From:	Arnaldo Carvalho de Melo <acme@...nel.org>
To:	David Ahern <dsahern@...il.com>
Cc:	Pavel Odintsov <pavel.odintsov@...il.com>,
	Andrew Vagin <avagin@...allels.com>,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH 0/7] [RFC] kernel: add a netlink interface to get
 information about processes

Em Fri, Feb 27, 2015 at 01:54:03PM -0700, David Ahern escreveu:
> On 2/27/15 1:43 PM, Arnaldo Carvalho de Melo wrote:
> 
> > From the subject line, there is patchkit, but I couldn't find it... Can
> >you resend it to me or point me to some url where I can get it?
> 
> https://lkml.org/lkml/2015/2/17/64

Yeah, I eventually found it, this would be great for perf:

Another good feature of task_diag is an ability to request information
for a few processes. Currently here are two stratgies
TASK_DIAG_DUMP_ALL	- get information for all tasks
TASK_DIAG_DUMP_CHILDREN	- get information for children of a specified
			  tasks


I.e. 'perf record -a' would use that TASK_DIAG_DUMP_ALL to synthesize
PERF_RECORD_{FORK,COMM} events, we would still need some way to generate
the PERF_RECORD_MMAP entries tho.

- Arnaldo
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