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
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=87bq4mrt9v.fsf@basil.nowhere.org \
--to=andi@firstfloor.org \
--cc=Robert.Olsson@data.slu.se \
--cc=dada1@cosmosbay.com \
--cc=davem@davemloft.net \
--cc=netdev@vger.kernel.org \
--cc=shemminger@vyatta.com \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).