Re: [RFC] fib_trie: memory waste solutions

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From: Andi Kleen <andi@...>

To: Robert Olsson <Robert.Olsson@...>

Cc: Stephen Hemminger <shemminger@...>, David Miller <davem@...>, Eric Dumazet <dada1@...>, <netdev@...>

Subject: Re: [RFC] fib_trie: memory waste solutions

Date: Monday, April 7, 2008 - 3:58 am

Robert Olsson <Robert.Olsson@data.slu.se> writes:
quoted text>
>  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

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Messages in current thread:

[RFC] fib_trie: flush improvement, Stephen Hemminger, (Tue Apr 1, 8:27 pm)

[RFC] fib_trie: flush improvement, Robert Olsson, (Wed Apr 2, 5:31 am)

Re: [RFC] fib_trie: flush improvement, Eric Dumazet, (Wed Apr 2, 4:01 am)

Re: [RFC] fib_trie: flush improvement, Eric Dumazet, (Wed Apr 2, 10:35 am)

Re: [RFC] fib_trie: flush improvement, Stephen Hemminger, (Wed Apr 2, 2:03 pm)

Re: [RFC] fib_trie: flush improvement, Eric Dumazet, (Wed Apr 2, 3:36 pm)

[RFC] fib_trie: memory waste solutions, Stephen Hemminger, (Fri Apr 4, 12:02 pm)

Re: [RFC] fib_trie: memory waste solutions, Eric Dumazet, (Mon Apr 7, 12:46 pm)

Re: [RFC] fib_trie: memory waste solutions, Stephen Hemminger, (Mon Apr 7, 6:48 pm)

Re: [RFC] fib_trie: memory waste solutions, David Miller, (Thu Apr 10, 5:57 am)

[RFC] fib_trie: memory waste solutions, Robert Olsson, (Mon Apr 7, 2:55 am)

Re: [RFC] fib_trie: memory waste solutions, Andi Kleen, (Mon Apr 7, 3:58 am)

Re: [RFC] fib_trie: memory waste solutions, Robert Olsson, (Mon Apr 7, 10:42 am)

Re: [RFC] fib_trie: memory waste solutions, Andi Kleen, (Mon Apr 7, 11:15 am)

Re: [RFC] fib_trie: memory waste solutions, Eric Dumazet, (Mon Apr 7, 11:36 am)


linux-kernel:
Karl Meyer	PROBLEM: 2.6.23-rc "NETDEV WATCHDOG: eth0: transmit timed out"
Greg Kroah-Hartman	[PATCH 040/196] kobject: add kobject_add_ng function
Steven Rostedt	[RFC PATCH v4] Unified trace buffer
Dave Airlie	[git pull] drm patches for 2.6.27 final
linux-netdev:
Krzysztof Halasa	Re: [PATCH v2] Re: WAN: new PPP code for generic HDLC
David Miller	Re: [PATCH] Expose netdevice dev_id through sysfs
Jay Cliburn	Re: atl1 64-bit => 32-bit DMA borkage (reproducible, bisected)
Evgeniy Polyakov	[resend take 2 0/4] Distributed storage.
git:
Andrew Morton	Untracked working tree files
Miklos Vajna	[rfc] git submodules howto
Ben Collins	Re: [kernel.org users] [RFD] On deprecating "git-foo" for builtins
Jon Smirl	! [rejected] master -> master (non-fast forward)
openbsd-misc:
rancor	How to copy/pipe console buffert to file?
Pieter Verberne	File collision while using pkg_add
Greg Thomas	Re: Is it possible to fix a stale NFS hadle without rebooting?
Didier Wiroth	win32-codecs, avi and amd64 question


Netfilter kernel module	9 hours ago	Linux kernel
serial driver xmit problem	12 hours ago	Linux kernel
Why Windows is better than Linux	12 hours ago	Linux general
How can I see my kernel messages in vt12?	19 hours ago	Linux kernel
Grub	1 day ago	Linux general
vmalloc_fault handling in x86_64	1 day ago	Linux kernel
epoll_wait()ing on epoll FD	1 day ago	Linux kernel
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Re: [RFC] fib_trie: memory waste solutions

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