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Date:	Mon, 30 Nov 2009 07:44:03 -0500
From:	jamal <>
To:	"Eric W. Biederman" <>
Cc:	David Miller <>,,
	Daniel Lezcano <>,
	Alexey Dobriyan <>,
	Patrick McHardy <>
Subject: Re: [PATCH 0/20] Batch network namespace cleanup

On Sun, 2009-11-29 at 17:46 -0800, Eric W. Biederman wrote:
> Recently Jamal and Daniel perform some experiments and found that
> large numbers of network namespace exiting simultaneously is very
> inefficient.  24+ minutes in some configurations.  The cpu overhead
> was negligible but it results in long hold times of net_mutex, and
> memory being consumed a long time after the last user has gone away.
> I looked into it and discovered that by batching network namespace
> cleanups I can reduce the time for 4k network namespaces exiting from
> 5-7 minutes in my configuration to 44 seconds.

Excellent work Eric. I have time today so i can test these patches
status quo vs.
This is against net-next?


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