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From: Ingo Oeser <ingo.oeser@informatik.tu-chemnitz.de>
To: Christoph Hellwig <hch@ns.caldera.de>
Cc: Alexander Viro <viro@math.psu.edu>,
	Christoph Rohland <cr@sap.com>,
	"David L. Parsley" <parsley@linuxjedi.org>,
	lm@bitmover.org, linux-kernel@vger.kernel.org
Subject: Re: hundreds of mount --bind mountpoints?
Date: Tue, 24 Apr 2001 00:00:09 +0200	[thread overview]
Message-ID: <20010424000008.J719@nightmaster.csn.tu-chemnitz.de> (raw)
In-Reply-To: <20010423224505.H719@nightmaster.csn.tu-chemnitz.de> <200104232056.WAA08894@ns.caldera.de>
In-Reply-To: <200104232056.WAA08894@ns.caldera.de>; from hch@ns.caldera.de on Mon, Apr 23, 2001 at 10:56:16PM +0200

On Mon, Apr 23, 2001 at 10:56:16PM +0200, Christoph Hellwig wrote:
> In article <20010423224505.H719@nightmaster.csn.tu-chemnitz.de> you wrote:
> > Last time we suggested this, people ended up with some OS trying
> > it and getting worse performance. 
> 
> Which OS? Neither BSD nor SVR4/SVR5 (or even SVR3) do that.

Don't remember. I think Larry McVoy told the story, so I cc'ed
him ;-)

> Because having an union in generic code that includes filesystem-specific
> memebers is ugly? It's one of those a little more performance for a lot of
> bad style optimizations.

We have this kind of stuff all over the place. If we allocate
some small amount of memory and and need some small amount
associated with this memory, there is no problem with a little
waste.

Waste is better than fragmentation. This is the lesson people
learned from segments in the ia32.

Objects are easier to manage, if they are the same size.

Regards

Ingo Oeser
-- 
10.+11.03.2001 - 3. Chemnitzer LinuxTag <http://www.tu-chemnitz.de/linux/tag>
         <<<<<<<<<<<<     been there and had much fun   >>>>>>>>>>>>

  reply	other threads:[~2001-04-23 22:00 UTC|newest]

Thread overview: 52+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2001-04-22 16:32 David L. Parsley
2001-04-22 16:41 ` Alexander Viro
2001-04-23 11:43 ` Christoph Rohland
2001-04-23 13:17   ` Ingo Oeser
2001-04-23 14:54     ` Christoph Rohland
2001-04-23 15:23       ` Ingo Oeser
2001-04-23 15:36         ` Alexander Viro
2001-04-23 20:45           ` Ingo Oeser
2001-04-23 20:56             ` Christoph Hellwig
2001-04-23 22:00               ` Ingo Oeser [this message]
2001-04-23 22:10                 ` Alexander Viro
2001-04-23 22:47             ` Andreas Dilger
2001-04-24  1:37             ` Jan Harkes
2001-04-24  2:53               ` Alexander Viro
2001-04-24  9:58                 ` David Woodhouse
2001-04-24 10:07                   ` Alexander Viro
2001-04-24 10:19                     ` David Woodhouse
2001-04-24 10:35                     ` Christoph Rohland
2001-04-24 10:54                       ` Alexander Viro
2001-04-24 12:51                         ` David Woodhouse
2001-04-24 13:34                         ` Christoph Rohland
2001-04-24 16:52                           ` David L. Parsley
2001-05-05  7:48                             ` [Patch] inline symlinks for tmpfs Christoph Rohland
2001-05-04 19:17                           ` [Patch] encapsulate shmem access to shmem_inode_info Christoph Rohland
     [not found]                             ` <3AF405FC.11D37FEB@bellsouth.net>
2001-05-06 13:58                               ` [Resend] Collection of tmpfs patches Christoph Rohland
2001-04-24 16:04                         ` Can't read SCSI TAPE Masaki Tsuji
2001-04-24 18:36                         ` hundreds of mount --bind mountpoints? Andreas Dilger
2001-04-24 18:49                           ` Alexander Viro
2001-04-24 19:11                             ` Andreas Dilger
2001-04-24 22:01                             ` Ingo Oeser
2001-04-24 21:59                 ` Trond Myklebust
2001-04-24 22:09                   ` Alexander Viro
2001-04-24 22:31                   ` Trond Myklebust
2001-04-23 21:19           ` Richard Gooch
2001-04-23 22:42             ` Albert D. Cahalan
2001-04-23 22:49             ` Richard Gooch
2001-04-23 23:07               ` Alexander Viro
2001-04-23 23:24                 ` Rik van Riel
2001-04-23 23:13               ` Richard Gooch
2001-04-24  6:33           ` Christoph Rohland
2001-04-23 14:08   ` David L. Parsley
2001-04-23 14:14     ` Alexander Viro
2001-04-24  0:16 Ed Tomlinson
2001-04-24  3:56 ` Andreas Dilger
2001-04-24 10:01   ` Alexander Viro
2001-04-24 13:27     ` Erik Mouw
2001-04-24 18:47       ` Andreas Dilger
2001-04-24 18:52         ` Alexander Viro
2001-04-24 20:45         ` Erik Mouw
2001-04-25  7:25         ` Christoph Rohland
2001-04-25 18:39     ` Andreas Dilger
2001-04-25 18:47       ` Alexander Viro

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