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

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Message-ID: <3238376.TxgiSSEfbZ@wuerfel>
Date:	Tue, 17 Feb 2015 09:53:09 +0100
From:	Arnd Bergmann <arnd@...db.de>
To:	Andrey Vagin <avagin@...nvz.org>
Cc:	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 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?

	Arnd
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