netdev - Re: [PATCH 00/16] Remove the ipv4 routing cache

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Message-ID: <1343323858.2626.11783.camel@edumazet-glaptop>
Date:	Thu, 26 Jul 2012 19:30:58 +0200
From:	Eric Dumazet <eric.dumazet@...il.com>
To:	Alexander Duyck <alexander.duyck@...il.com>
Cc:	David Miller <davem@...emloft.net>, netdev@...r.kernel.org
Subject: Re: [PATCH 00/16] Remove the ipv4 routing cache

On Thu, 2012-07-26 at 10:18 -0700, Alexander Duyck wrote:

> I tested this patch and it looks like it runs, but still has the same
> performance issue.  I did some digging into the annotation for
> ip_route_intput_noref and it seems like the issue is that I am hitting
> the dst_hold call in  __mkroute_input.

David suggested a percpu cache.

nh_rth_input would be allocated by alloc_percpu(struct dst *)

I can work on this.



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