linux-kernel - Re: [PATCH] nbd: show nbd client pid in sysfs

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Message-ID: <20061210180725.GA29943@country.grep.be>
Date:	Sun, 10 Dec 2006 19:07:25 +0100
From:	Wouter Verhelst <wouter@...p.be>
To:	Pavel Machek <pavel@....cz>
Cc:	Paul Clements <paul.clements@...eleye.com>, akpm@...l.org,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH] nbd: show nbd client pid in sysfs

On Fri, Dec 08, 2006 at 09:17:23PM +0000, Pavel Machek wrote:
> Hi!
> 
> > This simple patch allows nbd to expose the nbd-client 
> > daemon's PID in /sys/block/nbd<x>/pid. This is helpful 
> > for tracking connection status of a device and for 
> > determining which nbd devices are currently in use.
> 
> Actually is it needed at all? Perhaps nbd clients should be modified
> to put nbdX in their process nam?

I don't think that's the right approach; only the kernel can guarantee
that a given process is actually managing a given nbd device (I could
have some rogue process running around announcing that it's managing
nbd2, and then what?)

-- 
<Lo-lan-do> Home is where you have to wash the dishes.
  -- #debian-devel, Freenode, 2004-09-22
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