netdev - Re: [PATCH net-next-2.6 v3] net: factorize sync-rcu call in unregister_netdevice

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Date:	Thu, 16 Dec 2010 14:04:17 -0800 (PST)
From:	David Miller <davem@...emloft.net>
To:	opurdila@...acom.com
Cc:	netdev@...r.kernel.org, lucian.grijincu@...il.com,
	ddvlad@...edu.org
Subject: Re: [PATCH net-next-2.6 v3] net: factorize sync-rcu call in
 unregister_netdevice_many

From: Octavian Purdila <opurdila@...acom.com>
Date: Tue, 14 Dec 2010 00:44:07 +0200

> Add dev_close_many and dev_deactivate_many to factorize another
> sync-rcu operation on the netdevice unregister path.
> 
> $ modprobe dummy numdummies=10000
> $ ip link set dev dummy* up
> $ time rmmod dummy
> 
> Without the patch           With the patch
> 
> real    0m 24.63s           real    0m 5.15s
> user    0m 0.00s            user    0m 0.00s
> sys     0m 6.05s            sys     0m 5.14s
> 
> Signed-off-by: Octavian Purdila <opurdila@...acom.com>

I'll apply this, thanks Octavian.
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