netdev - Re: [PATCH] net: convert TCP/DCCP ehash rwlocks to spinlocks

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Message-Id: <20081120.203946.89534386.davem@davemloft.net>
Date:	Thu, 20 Nov 2008 20:39:46 -0800 (PST)
From:	David Miller <davem@...emloft.net>
To:	dada1@...mosbay.com
Cc:	netdev@...r.kernel.org
Subject: Re: [PATCH] net: convert TCP/DCCP ehash rwlocks to spinlocks

From: Eric Dumazet <dada1@...mosbay.com>
Date: Thu, 20 Nov 2008 19:53:56 +0100

> Now TCP & DCCP use RCU lookups, we can convert ehash rwlocks to spinlocks.
> 
> /proc/net/tcp and other seq_file 'readers' can safely be converted to 'writers'.
> 
> This should speedup writers, since spin_lock()/spin_unlock()
> only use one atomic operation instead of two for write_lock()/write_unlock()
> 
> Signed-off-by: Eric Dumazet <dada1@...mosbay.com>

Nice work, applied, thanks Eric.

Feel free to provide lat_connect and similar before/after numbers for
changes like this in the future :)
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