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Re: [patch 0/7] [RFC] SLUB: Improve allocpercpu to reduce per cpu access overhead
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From:
Christoph Lameter <clameter@...>
To: Eric Dumazet <dada1@...>
Cc: David Miller <davem@...>, <akpm@...>, <linux-arch@...>, <linux-kernel@...>, <mathieu.desnoyers@...>, <penberg@...>
Subject:
Re: [patch 0/7] [RFC] SLUB: Improve allocpercpu to reduce per cpu access overhead
Date: Thursday, November 1, 2007 - 8:58 pm
On Fri, 2 Nov 2007, Eric Dumazet wrote:
quoted text
> > Na. Some reasonable upper limit needs to be set. If we set that to say > > 32Megabytes and do the virtual mapping then we can just populate the first > > 2M and only allocate the remainder if we need it. Then we need to rely on > > Mel's defrag stuff though defrag memory if we need it. > > If a 2MB page is not available, could we revert using 4KB pages ? (like > vmalloc stuff), paying an extra runtime overhead of course.
Sure. Its going to be like vmemmap. There will be limited imposed though by the amount of virtual space available. Basically the dynamic per cpu area can be at maximum available_virtual_space / NR_CPUS -
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Messages in current thread:
[patch 0/7] [RFC] SLUB: Improve allocpercpu to reduce per cp...
, Christoph Lameter
, (Wed Oct 31, 8:02 pm)
[PATCH 1/7] One less parameter to __d_path
, Jan Blunck
, (Mon Oct 29, 8:41 am)
Re: [patch 0/7] [RFC] SLUB: Improve allocpercpu to reduce pe...
, Eric Dumazet
, (Thu Nov 1, 3:17 am)
Re: [patch 0/7] [RFC] SLUB: Improve allocpercpu to reduce pe...
, Christoph Lameter
, (Thu Nov 1, 8:57 am)
Re: [patch 0/7] [RFC] SLUB: Improve allocpercpu to reduce pe...
, David Miller
, (Thu Nov 1, 5:28 pm)
Re: [patch 0/7] [RFC] SLUB: Improve allocpercpu to reduce pe...
, Christoph Lameter
, (Thu Nov 1, 6:11 pm)
Re: [patch 0/7] [RFC] SLUB: Improve allocpercpu to reduce pe...
, David Miller
, (Thu Nov 1, 6:14 pm)
Re: [patch 0/7] [RFC] SLUB: Improve allocpercpu to reduce pe...
, Christoph Lameter
, (Thu Nov 1, 6:16 pm)
Re: [patch 0/7] [RFC] SLUB: Improve allocpercpu to reduce pe...
, David Miller
, (Thu Nov 1, 3:57 am)
Re: [patch 0/7] [RFC] SLUB: Improve allocpercpu to reduce pe...
, Christoph Lameter
, (Thu Nov 1, 9:01 am)
Re: [patch 0/7] [RFC] SLUB: Improve allocpercpu to reduce pe...
, David Miller
, (Thu Nov 1, 5:25 pm)
Re: [patch 0/7] [RFC] SLUB: Improve allocpercpu to reduce pe...
, David Miller
, (Wed Oct 31, 8:24 pm)
Re: [patch 0/7] [RFC] SLUB: Improve allocpercpu to reduce pe...
, Christoph Lameter
, (Wed Oct 31, 8:26 pm)
Re: [patch 0/7] [RFC] SLUB: Improve allocpercpu to reduce pe...
, David Miller
, (Wed Oct 31, 8:27 pm)
Re: [patch 0/7] [RFC] SLUB: Improve allocpercpu to reduce pe...
, Christoph Lameter
, (Wed Oct 31, 8:31 pm)
Re: [patch 0/7] [RFC] SLUB: Improve allocpercpu to reduce pe...
, David Miller
, (Wed Oct 31, 8:51 pm)
Re: [patch 0/7] [RFC] SLUB: Improve allocpercpu to reduce pe...
, Christoph Lameter
, (Wed Oct 31, 8:53 pm)
Re: [patch 0/7] [RFC] SLUB: Improve allocpercpu to reduce pe...
, David Miller
, (Wed Oct 31, 9:00 pm)
Re: [patch 0/7] [RFC] SLUB: Improve allocpercpu to reduce pe...
, Christoph Lameter
, (Wed Oct 31, 9:01 pm)
Re: [patch 0/7] [RFC] SLUB: Improve allocpercpu to reduce pe...
, David Miller
, (Wed Oct 31, 9:09 pm)
Re: [patch 0/7] [RFC] SLUB: Improve allocpercpu to reduce pe...
, Christoph Lameter
, (Wed Oct 31, 9:12 pm)
Re: [patch 0/7] [RFC] SLUB: Improve allocpercpu to reduce pe...
, David Miller
, (Wed Oct 31, 9:13 pm)
Re: [patch 0/7] [RFC] SLUB: Improve allocpercpu to reduce pe...
, Christoph Lameter
, (Thu Nov 1, 12:16 am)
Re: [patch 0/7] [RFC] SLUB: Improve allocpercpu to reduce pe...
, David Miller
, (Thu Nov 1, 3:01 am)
Re: [patch 0/7] [RFC] SLUB: Improve allocpercpu to reduce pe...
, David Miller
, (Thu Nov 1, 5:14 am)
Re: [patch 0/7] [RFC] SLUB: Improve allocpercpu to reduce pe...
, Christoph Lameter
, (Thu Nov 1, 9:03 am)
Re: [patch 0/7] [RFC] SLUB: Improve allocpercpu to reduce pe...
, David Miller
, (Thu Nov 1, 5:29 pm)
Re: [patch 0/7] [RFC] SLUB: Improve allocpercpu to reduce pe...
, Christoph Lameter
, (Thu Nov 1, 6:15 pm)
Re: [patch 0/7] [RFC] SLUB: Improve allocpercpu to reduce pe...
, David Miller
, (Thu Nov 1, 6:38 pm)
Re: [patch 0/7] [RFC] SLUB: Improve allocpercpu to reduce pe...
, Christoph Lameter
, (Thu Nov 1, 6:48 pm)
Re: [patch 0/7] [RFC] SLUB: Improve allocpercpu to reduce pe...
, Eric Dumazet
, (Thu Nov 1, 7:00 pm)
Re: [patch 0/7] [RFC] SLUB: Improve allocpercpu to reduce pe...
, Christoph Lameter
, (Thu Nov 1, 9:40 pm)
Re: [patch 0/7] [RFC] SLUB: Improve allocpercpu to reduce pe...
, Christoph Lameter
, (Thu Nov 1, 8:58 pm)
Re: [patch 0/7] [RFC] SLUB: Improve allocpercpu to reduce pe...
, David Miller
, (Thu Nov 1, 6:58 pm)
Re: [patch 0/7] [RFC] SLUB: Improve allocpercpu to reduce pe...
, Herbert Xu
, (Mon Nov 12, 6:52 am)
Re: [patch 0/7] [RFC] SLUB: Improve allocpercpu to reduce pe...
, David Miller
, (Mon Nov 12, 5:28 pm)
Re: [patch 0/7] [RFC] SLUB: Improve allocpercpu to reduce pe...
, Christoph Lameter
, (Mon Nov 12, 3:14 pm)
Re: [patch 0/7] [RFC] SLUB: Improve allocpercpu to reduce pe...
, Eric Dumazet
, (Mon Nov 12, 3:48 pm)
RE: [patch 0/7] [RFC] SLUB: Improve allocpercpu to reduce pe...
, Luck, Tony
, (Mon Nov 12, 3:57 pm)
Re: [patch 0/7] [RFC] SLUB: Improve allocpercpu to reduce pe...
, Eric Dumazet
, (Mon Nov 12, 4:14 pm)
Re: [patch 0/7] [RFC] SLUB: Improve allocpercpu to reduce pe...
, David Miller
, (Mon Nov 12, 6:46 pm)
Re: [patch 0/7] [RFC] SLUB: Improve allocpercpu to reduce pe...
, Christoph Lameter
, (Mon Nov 12, 3:56 pm)
Re: [patch 0/7] [RFC] SLUB: Improve allocpercpu to reduce pe...
, Eric Dumazet
, (Mon Nov 12, 4:18 pm)
Re: [patch 0/7] [RFC] SLUB: Improve allocpercpu to reduce pe...
, David Miller
, (Mon Nov 12, 6:46 pm)
Re: [patch 0/7] [RFC] SLUB: Improve allocpercpu to reduce pe...
, Peter Zijlstra
, (Fri Nov 2, 6:28 am)
Re: [patch 0/7] [RFC] SLUB: Improve allocpercpu to reduce pe...
, Christoph Lameter
, (Fri Nov 2, 10:35 am)
Re: [patch 0/7] [RFC] SLUB: Improve allocpercpu to reduce pe...
, Peter Zijlstra
, (Fri Nov 2, 11:20 am)
Re: [patch 0/7] [RFC] SLUB: Improve allocpercpu to reduce pe...
, Christoph Lameter
, (Fri Nov 2, 11:29 am)
Re: [patch 0/7] [RFC] SLUB: Improve allocpercpu to reduce pe...
, Christoph Lameter
, (Thu Nov 1, 9:06 pm)
Re: [patch 0/7] [RFC] SLUB: Improve allocpercpu to reduce pe...
, David Miller
, (Thu Nov 1, 10:51 pm)
Re: [patch 0/7] [RFC] SLUB: Improve allocpercpu to reduce pe...
, David Miller
, (Thu Nov 1, 1:38 am)
Re: [patch 0/7] [RFC] SLUB: Improve allocpercpu to reduce pe...
, Christoph Lameter
, (Wed Oct 31, 9:21 pm)
Re: [patch 0/7] [RFC] SLUB: Improve allocpercpu to reduce pe...
, David Miller
, (Thu Nov 1, 1:27 am)
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