From: David Miller <davem@davemloft.net>
To: hannes@stressinduktion.org
Cc: netdev@vger.kernel.org, eric.dumazet@gmail.com,
hideaki@yoshifuji.org, vyasevich@gmail.com,
nicolas.dichtel@6wind.com, kafai@fb.com
Subject: Re: [PATCH v2 net-next 0/9] ipv6: fib6: socket dst_entry improvments and cleanups
Date: Fri, 26 Sep 2014 12:46:43 -0400 (EDT) [thread overview]
Message-ID: <20140926.124643.202150841147181272.davem@davemloft.net> (raw)
In-Reply-To: <1411718323.1731596.171980125.03C65719@webmail.messagingengine.com>
From: Hannes Frederic Sowa <hannes@stressinduktion.org>
Date: Fri, 26 Sep 2014 09:58:43 +0200
> On Fri, Sep 26, 2014, at 06:28, David Miller wrote:
>> From: Hannes Frederic Sowa <hannes@stressinduktion.org>
>> Date: Sun, 21 Sep 2014 16:11:44 +0200
>>
>> > Eric Dumazet noticed that rt6_nodes wich are neither RTF_NONEXTHOP nor
>> > RTF_GATEWAY but DST_HOST ones cause major routing lookup churn because
>> > their rt6_genid is never renewed, thus ip6_dst_check always considers
>> > them outdated. This is a major problem, because these kind of routes
>> > are normally used to in input handling.
>>
>> This series is a disappointment for me from the perspective of the
>> fact that we have a regression in mainline and this is too complex
>> of a set of changes for there.
>>
>> If we relookup the thing every TCP input packet, we might as well
>> not do the input route caching in the socket.
>
> I can understand.
>
> Toss this series, I'll try to do better tomorrow and send changes for
> net and submit net-next cleanups when your queue is a bit smaller.
BTW, don't get me wrong, I like the new code and for 'net-next' it's
good.
But for 'net' we have to come up with something simpler meanwhile.
next prev parent reply other threads:[~2014-09-26 16:46 UTC|newest]
Thread overview: 14+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-09-21 14:11 [PATCH v2 net-next 0/9] ipv6: fib6: socket dst_entry improvments and cleanups Hannes Frederic Sowa
2014-09-21 14:11 ` [PATCH v2 net-next 1/9] ipv6: support for fib6_clean_* to update fn_sernum Hannes Frederic Sowa
2014-09-21 14:11 ` [PATCH v2 net-next 2/9] ipv6: a bit more typesafety Hannes Frederic Sowa
2014-09-21 14:11 ` [PATCH v2 net-next 3/9] ipv6: only generate one new serial number during fib6_add() Hannes Frederic Sowa
2014-09-21 14:11 ` [PATCH v2 net-next 4/9] ipv6: if no function for cleaner is specified only visit fib6_nodes Hannes Frederic Sowa
2014-09-21 14:11 ` [PATCH v2 net-next 5/9] ipv6: new function fib6_flush_trees and use it instead of bumping removed rt6_genid Hannes Frederic Sowa
2014-09-21 14:11 ` [PATCH v2 net-next 6/9] ipv6: no need to bump rt_genid_ipv6 on address addition Hannes Frederic Sowa
2014-09-21 14:11 ` [PATCH v2 net-next 7/9] ipv6: keep rt_sernum per namespace to reduce number of flushes Hannes Frederic Sowa
2014-09-21 14:11 ` [PATCH v2 net-next 8/9] ipv6: switch rt_sernum to atomic_t and clean up types Hannes Frederic Sowa
2014-09-21 14:11 ` [PATCH v2 net-next 9/9] ipv6: rename rt_genid_bump_ipv6 to rt6_inval_dst_caches Hannes Frederic Sowa
2014-09-26 4:28 ` [PATCH v2 net-next 0/9] ipv6: fib6: socket dst_entry improvments and cleanups David Miller
2014-09-26 7:58 ` Hannes Frederic Sowa
2014-09-26 16:46 ` David Miller [this message]
2014-09-27 23:32 ` Hannes Frederic Sowa
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