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

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Message-ID: <20150217213313.GB7091@paralelels.com>
Date:	Wed, 18 Feb 2015 00:33:13 +0300
From:	Andrew Vagin <avagin@...allels.com>
To:	Arnd Bergmann <arnd@...db.de>
CC:	Andrey Vagin <avagin@...nvz.org>, <linux-kernel@...r.kernel.org>,
	<linux-api@...r.kernel.org>, Oleg Nesterov <oleg@...hat.com>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Cyrill Gorcunov <gorcunov@...nvz.org>,
	"Pavel Emelyanov" <xemul@...allels.com>,
	Roger Luethi <rl@...lgate.ch>
Subject: Re: [PATCH 0/7] [RFC] kernel: add a netlink interface to get
 information about processes

On Tue, Feb 17, 2015 at 09:53:09AM +0100, Arnd Bergmann wrote:
> On Tuesday 17 February 2015 11:20:19 Andrey Vagin wrote:
> > task_diag is based on netlink sockets and looks like socket-diag, which
> > is used to get information about sockets.
> > 
> > A request is described by the task_diag_pid structure:
> > 
> > struct task_diag_pid {
> >        __u64   show_flags;      /* specify which information are required */
> >        __u64   dump_stratagy;   /* specify a group of processes */
> > 
> >        __u32   pid;
> > };
> 
> Can you explain how the interface relates to the 'taskstats' genetlink
> API? Did you consider extending that interface to provide the
> information you need instead of basing on the socket-diag?

It isn't based on the socket-diag, it looks like socket-diag.

Current task_diag registers a new genl family, but we can use the taskstats
family and add task_diag commands to it.

Thanks,
Andrew

> 
> 	Arnd
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