Messages in this thread | | | Date | Fri, 25 May 2012 18:51:31 -0400 (EDT) | Subject | Re: [PATCH] net: compute a more reasonable default ip6_rt_max_size | From | David Miller <> |
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From: Arun Sharma <asharma@fb.com> Date: Fri, 25 May 2012 15:22:54 -0700
> On 5/25/12 1:47 PM, Eric Dumazet wrote: >> On Fri, 2012-05-25 at 13:15 -0700, Arun Sharma wrote: >>> The algorithm is based on ipv4 and alloc_large_system_hash(). >>> >> >> Why is it needed at all ? >> >> IPv4 has a route cache with potentially millions of entries, not IPv6. > > With the default size of 4096 for the ipv6 routing table, entries can > get garbage collected and hosts could lose their default route and > therefore lose connectivity. > > We actually saw it happen.
Under no circumstances should administrator configured ipv6 routes be garbage collected, that is a bug.
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