From: "Denis V. Lunev" <den@openvz.org>
To: David Miller <davem@davemloft.net>
Cc: Netdev List <netdev@vger.kernel.org>,
containers <containers@lists.osdl.org>,
Daniel Lezcano <dlezcano@fr.ibm.com>
Subject: [PATCH 0/8 net-2.6.26] [NETNS]: namespace refcounting cleanup
Date: Tue, 15 Apr 2008 16:35:59 +0400 [thread overview]
Message-ID: <1208262959.21529.32.camel@iris.sw.ru> (raw)
Network namespace has two referrence counters:
- count
- use_count.
The namespace is scheduled to destruction automatically when the count
becomes 0.
There are several SLAB objects with a pointer to a namespace on them.
These objects are cleaned up during namespace stop. Some of them
increment use_count, some don't. This set fixes this discrepancy,
i.e. now all such objects increment the use_count.
Though, the use_count itself is used in a very debug manner and checked
only during namespace stop. So, I have placed it under
NETNS_REFCNT_DEBUG definition exactly like this is done for socket
refcounting code to remove extra atomic from any possible fast paths.
Signed-off-by: Denis V. Lunev <den@openvz.org>
next reply other threads:[~2008-04-15 12:37 UTC|newest]
Thread overview: 12+ messages / expand[flat|nested] mbox.gz Atom feed top
2008-04-15 12:35 Denis V. Lunev [this message]
2008-04-15 12:37 ` [PATCH 1/8 net-2.6.26] [NETNS]: Make netns refconting debug like a socket one Denis V. Lunev
2008-04-15 14:55 ` Brian Haley
2008-04-16 8:58 ` David Miller
2008-04-15 12:37 ` [PATCH 2/8 net-2.6.26] [NETNS]: Add netns refcnt debug for kernel sockets Denis V. Lunev
2008-04-15 12:37 ` [PATCH 3/8 net-2.6.26] [NETNS]: Add netns refcnt debug for timewait buckets Denis V. Lunev
2008-04-15 12:37 ` [PATCH 4/8 net-2.6.26] [NETNS]: Add netns refcnt debug into fib_info Denis V. Lunev
2008-04-15 12:37 ` [PATCH 5/8 net-2.6.26] [NETNS]: Add netns refcnt debug for inet bind buckets Denis V. Lunev
2008-04-15 12:37 ` [PATCH 6/8 net-2.6.26] [NETNS]: Add netns refcnt debug for dst ops Denis V. Lunev
2008-04-15 12:37 ` [PATCH 7/8 net-2.6.26] [NETNS]: Add netns refcnt debug to fib rules Denis V. Lunev
2008-04-15 12:37 ` [PATCH 8/8 net-2.6.26] [NETNS]: Add netns refcnt debug for network devices Denis V. Lunev
2008-04-16 9:07 ` [PATCH 0/8 net-2.6.26] [NETNS]: namespace refcounting cleanup David Miller
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