From: Andi Kleen <andi@firstfloor.org>
To: Robert Olsson <Robert.Olsson@data.slu.se>
Cc: Stephen Hemminger <shemminger@vyatta.com>,
David Miller <davem@davemloft.net>,
Eric Dumazet <dada1@cosmosbay.com>,
netdev@vger.kernel.org
Subject: Re: [RFC] fib_trie: memory waste solutions
Date: Mon, 07 Apr 2008 09:58:04 +0200 [thread overview]
Message-ID: <87bq4mrt9v.fsf@basil.nowhere.org> (raw)
In-Reply-To: <18425.50538.876583.892728@robur.slu.se> (Robert Olsson's message of "Mon, 7 Apr 2008 08:55:38 +0200")
Robert Olsson <Robert.Olsson@data.slu.se> writes:
>
> Do we get slower with vmalloc due to TLB-lookups etc? Guess this
> should be investigated.
In some cases it might even go faster because a lot of x86 CPUs
have far more 4K TLBs than 2M TLBs. vmalloc is just quite expensive
in setup/free time, but that shouldn't be a big issue here.
The memory savings are impressive.
-Andi
next prev parent reply other threads:[~2008-04-07 8:13 UTC|newest]
Thread overview: 15+ messages / expand[flat|nested] mbox.gz Atom feed top
2008-04-02 0:27 [RFC] fib_trie: flush improvement Stephen Hemminger
2008-04-02 8:01 ` Eric Dumazet
2008-04-02 14:35 ` Eric Dumazet
2008-04-02 18:03 ` Stephen Hemminger
2008-04-02 19:36 ` Eric Dumazet
2008-04-04 16:02 ` [RFC] fib_trie: memory waste solutions Stephen Hemminger
2008-04-07 6:55 ` Robert Olsson
2008-04-07 7:58 ` Andi Kleen [this message]
2008-04-07 14:42 ` Robert Olsson
2008-04-07 15:15 ` Andi Kleen
2008-04-07 15:36 ` Eric Dumazet
2008-04-07 16:46 ` Eric Dumazet
2008-04-07 22:48 ` Stephen Hemminger
2008-04-10 9:57 ` David Miller
2008-04-02 9:31 ` [RFC] fib_trie: flush improvement Robert Olsson
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