From: Andi Kleen <ak@suse.de>
To: "David S. Miller" <davem@redhat.com>
Cc: acme@conectiva.com.br, linux-kernel@vger.kernel.org
Subject: Re: [PATCH] ipv4: only produce one record in fib_seq_show
Date: 20 Oct 2002 07:58:26 +0200 [thread overview]
Message-ID: <p73n0p9odml.fsf@oldwotan.suse.de> (raw)
In-Reply-To: "David S. Miller"'s message of "20 Oct 2002 07:24:27 +0200"
"David S. Miller" <davem@redhat.com> writes:
> Note that this would prevent ipv4 from being hacked into being
> modular, but there are no plans at all to make modular ipv4 for 2.6.x
> at all so this is a valid transformation/cleanup.
(if ipv4 was made modular) Just reserve the per-cpu statistics space in the
main kernel when CONFIG_IPV4_MODULE is set. Then you can use it from the module
as needed.
> kernel/timer.c's main data structures desperately want to be per-cpu
> or allocated at boot time also. It, as has been noted often on this
> list, is actually more bloat than the ipv4 statistics stuff. :-)
.. and many more data structures that are still cacheline padded too.
(my favourite is in balance_dirty_pages_ratelimit which costs 4K overall
for a single per cpu counter)
-Andi
next parent reply other threads:[~2002-10-20 5:52 UTC|newest]
Thread overview: 14+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <20021020010331.GB15254@conectiva.com.br.suse.lists.linux.kernel>
[not found] ` <20021019.211307.00017347.davem@redhat.com.suse.lists.linux.kernel>
[not found] ` <20021020050849.GD15254@conectiva.com.br.suse.lists.linux.kernel>
[not found] ` <20021019.221403.116117803.davem@redhat.com.suse.lists.linux.kernel>
2002-10-20 5:58 ` Andi Kleen [this message]
2002-10-19 23:32 [PATCH] ipv4: only produce one record in fib_seq_show Arnaldo Carvalho de Melo
2002-10-19 23:54 ` David S. Miller
2002-10-20 0:09 ` Arnaldo Carvalho de Melo
2002-10-20 0:38 ` David S. Miller
2002-10-20 1:03 ` Arnaldo Carvalho de Melo
2002-10-20 4:13 ` David S. Miller
2002-10-20 5:08 ` Arnaldo Carvalho de Melo
2002-10-20 5:14 ` David S. Miller
2002-10-20 5:26 ` Arnaldo Carvalho de Melo
2002-10-20 5:52 ` Andrew Morton
2002-10-20 5:15 ` David S. Miller
2002-10-20 5:30 ` Arnaldo Carvalho de Melo
2002-10-20 7:08 ` Keith Owens
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