netdev - Re: [PATCH net-next] ipv4: per cpu uncached list

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Message-Id: <20150115.182639.1035013313619765901.davem@davemloft.net>
Date:	Thu, 15 Jan 2015 18:26:39 -0500 (EST)
From:	David Miller <davem@...emloft.net>
To:	eric.dumazet@...il.com
Cc:	netdev@...r.kernel.org, willemb@...gle.com
Subject: Re: [PATCH net-next] ipv4: per cpu uncached list

From: Eric Dumazet <eric.dumazet@...il.com>
Date: Wed, 14 Jan 2015 15:17:06 -0800

> From: Eric Dumazet <edumazet@...gle.com>
> 
> RAW sockets with hdrinc suffer from contention on rt_uncached_lock
> spinlock.
> 
> One solution is to use percpu lists, since most routes are destroyed
> by the cpu that created them.
> 
> It is unclear why we even have to put these routes in uncached_list,
> as all outgoing packets should be freed when a device is dismantled.
> 
> Signed-off-by: Eric Dumazet <edumazet@...gle.com>
> Fixes: caacf05e5ad1 ("ipv4: Properly purge netdev references on uncached routes.")

This looks fine, applied, thanks Eric.
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