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From: "Michael S. Zick" <mszick@wolfbutter.com>
To: parisc-linux@lists.parisc-linux.org
Subject: Re: copy_user_page_asm suggested 64bit improvment [Was: [parisc-linux] clear user page test]
Date: Wed, 12 Jan 2005 07:52:07 -0600	[thread overview]
Message-ID: <200501120752.07206.mszick@wolfbutter.com> (raw)
In-Reply-To: <20041231225447.GC23592@colo.lackof.org>

On Fri December 31 2004 16:54, Grant Grundler wrote:
> On Fri, Dec 31, 2004 at 03:35:28PM -0600, Michael S. Zick wrote:
> > I tried the 'patch that works' route with a similar suggestion for sched.c
> > Based on that experience...
> 
> ah good. You learned something. :^)
> 
> > What I proposed was:
> > The memory page free pool be defined as a 'virtual device' with
> > a two part driver.
> ...
> > In this virtual free pool device, the kernel is the 'client' and the
> > daemon is the 'host' (which only happens to be part of the kernel).
> > Only the 'client' code is in the user's execution path.
> 
> This sounds neat and "clean". But things could get very ugly
> when one needs to "steal" zero'd pages for other uses.
> 
> > Should be interesting to consider.
> 
> Yes, Agreed.
> 
Design seems to be drifting in that general direction.

See: change log on 2.6.11-rc1

More details at:
<http://seclists.org/lists/linux-kernel/2005/Jan/0888.html>

Mike (with Joel's help).
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  parent reply	other threads:[~2005-01-12 13:52 UTC|newest]

Thread overview: 18+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
     [not found] <418A80E8000124B5@mail-6-bnl.tiscali.it>
2004-12-27  7:36 ` copy_user_page_asm suggested 64bit improvment [Was: [parisc-linux] clear user page test] Grant Grundler
2004-12-27 10:40   ` Joel Soete
2004-12-27 15:08     ` James Bottomley
2004-12-31 20:26       ` Michael S. Zick
2004-12-31 20:56         ` Grant Grundler
2004-12-31 21:35           ` Michael S. Zick
     [not found]             ` <20041231225447.GC23592@colo.lackof.org>
2004-12-31 23:56               ` Michael S. Zick
2005-01-12 13:52               ` Michael S. Zick [this message]
2005-01-12 15:32                 ` Joel Soete
2004-12-31 21:21         ` James Bottomley
2004-12-27 17:34     ` Joel Soete
2004-12-27 18:32     ` Joel Soete
2004-12-28 16:25   ` [parisc-linux] Re: copy_user_page_asm suggested 64bit improvment (Test case) Joel Soete
2004-12-29  5:46     ` Grant Grundler
2004-12-29 11:36       ` Joel Soete
2004-12-30  8:10   ` copy_user_page_asm suggested 64bit improvment [Was: [parisc-linux] clear user page test] Grant Grundler
2004-12-30 17:04     ` [parisc-linux] Re: copy_user_page_asm suggested 64bit improvment [Was: [parisc-l John David Anglin
     [not found] <20041210190333.GC6653@colo.lackof.org>
     [not found] ` <418A811700010466@mail-8-bnl.mail.tiscali.sys>
     [not found]   ` <20041213180758.GA8705@colo.lackof.org>
     [not found]     ` <41C34C56.4080508@tiscali.be>
     [not found]       ` <20041218073036.GA29003@colo.lackof.org>
     [not found]         ` <41C440A3.6060708@tiscali.be>
     [not found]           ` <41C4872D.6010705@tiscali.be>
     [not found]             ` <41C4A35A.7010003@tiscali.be>
     [not found]               ` <20041219042528.GB15282@colo.lackof.org>
     [not found]                 ` <41C5D761.4030004@tiscali.be>
2004-12-19 20:27                   ` copy_user_page_asm suggested 64bit improvment [Was: [parisc-linux] clear user page test] Joel Soete

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