netdev - Re: [v2 PATCH 0/6] IPVS: init and cleanup.

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Date:	Fri, 29 Apr 2011 10:29:30 +0300 (EEST)
From:	Julian Anastasov <ja@....bg>
To:	Hans Schillstrom <hans@...illstrom.com>
cc:	horms@...ge.net.au, ebiederm@...ssion.com,
	lvs-devel@...r.kernel.org, netdev@...r.kernel.org,
	netfilter-devel@...r.kernel.org, hans.schillstrom@...csson.com
Subject: Re: [v2 PATCH 0/6] IPVS: init and cleanup.


	Hello,

On Fri, 29 Apr 2011, Hans Schillstrom wrote:

> This patch series handles exit from a network name space.
> 
> REVISION
> 
> This is version 3

	Great! Only one missing lock:

Patch 3:
	Missing write_[un]lock_bh(&__ip_vs_svc_lock) in ip_vs_flush,
	now we use ip_vs_unlink_service_nolock.

As you are going to create new version you can look also at these:

Patch 5:
	Can you rename 'goto exit;' to 'goto cleanup;' or
	'goto out;'

Patch 6:
	Add at least one comma after 'enabled' here:
	netns(%d) enabled first service added

> OVERVIEW
> Basically there was three faults in the netns implementation.
> - Kernel threads hold devices and preventing an exit.
> - dst cache holds references to devices.
> - Services was not always released.
> 
> Patch 1 & 3 contains the functionality
>       4 renames funcctions
>       5 removes empty functions
>       6 Debuging.
> 
> IMPLEMENTATION
> - Avoid to increment the usage counter for kernel threads.
>   this is done in the first patch.
> - Patch 3 tries to restore the cleanup order.
>   Add NETDEV_UNREGISTER notification for dst_reset
> 
> Revision 3 
> Residies in patch 3
>         Throttle renamed to enable.
>         Comments from Julian implemented
>         Check enable in ip_vs_in, ip_vs_out and ip_vs_forward_icmp*
>         Remove in ip_vs_in_icmp*.
>         ip_vs_svc_reset() moved into ip_vs_dst_event().
>         ip_vs_service_cleanup() uses ip_vs_flush and mutex lock.
>         ip_vs_unlink_service_nolock() added.

Regards

--
Julian Anastasov <ja@....bg>
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