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From: "Denis V. Lunev" <den-3ImXcnM4P+0@public.gmane.org>
To: "Eric W. Biederman"
	<ebiederm-aS9lmoZGLiVWk0Htik3J/w@public.gmane.org>,
	Daniel Lezcano <dlezcano-NmTC/0ZBporQT0dZR+AlfA@public.gmane.org>,
	Pavel Emelianov <xemul-3ImXcnM4P+0@public.gmane.org>,
	Linux Containers
	<containers-qjLDD68F18O7TbgM5vRIOg@public.gmane.org>,
	devel-GEFAQzZX7r8dnm+yROfE0A@public.gmane.org
Subject: netns refcounting
Date: Fri, 16 Nov 2007 17:04:08 +0300	[thread overview]
Message-ID: <473DA358.9040705@sw.ru> (raw)

Hello, All!

During port of Eric's patches I have noticed an interesting thing.
The patch "net: Teach the ipv4 route cache to handle multiple network
namespaces" call hold_net for each IPv4 DST cache entry.

Though it is not possible to stop a namespace without stopping all the
devices inside. Additionally, the device can't be unregistered if there
are dst entries to it. These entries are moved to a namespace loopback
and the namespace will block until these entries will gone from a loopback.

So, I do not see a necessity to have an extra atomic on this hot path,
i.e. hold_net can re moved away for this. Are there any holes?

Regards,
	Den

             reply	other threads:[~2007-11-16 14:04 UTC|newest]

Thread overview: 3+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2007-11-16 14:04 Denis V. Lunev [this message]
     [not found] ` <473DA358.9040705-3ImXcnM4P+0@public.gmane.org>
2007-11-16 15:50   ` netns refcounting Daniel Lezcano
2007-11-16 17:14   ` Eric W. Biederman

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