From: Andrew Morton <akpm@osdl.org>
To: Kurt Garloff <garloff@suse.de>
Cc: hch@infradead.org, linux-scsi@vger.kernel.org,
pbadari@us.ibm.com, willy@debian.org,
James.Bottomley@steeleye.com
Subject: Re: lots and lots of disks again
Date: Wed, 11 Feb 2004 13:28:48 -0800 [thread overview]
Message-ID: <20040211132848.49eece0d.akpm@osdl.org> (raw)
In-Reply-To: <20040211145614.GA4010@tpkurt.garloff.de>
Kurt Garloff <garloff@suse.de> wrote:
>
> Hi Andrew,
>
> On Tue, Feb 10, 2004 at 10:26:03AM -0800, Andrew Morton wrote:
> > Kurt Garloff <garloff@suse.de> wrote:
> > >
> > > Since when is 4k huge?
> > > Sorry, I don't see any benefit in adding complexity to avoid a 4k array.
> >
> > Well yes, but we do have lib/idr.c which I believe does what you need. It
> > is simple to use.
>
> It can store a pointer per ID. One that I don't need, unless I overlook
> some possibility to put an already existing pointer in there.
>
> If we really allocate thousands of disks, the overhead of this solution
> will be higher than the bitmap, I'm afraid.
Four (or eight) bytes per disk! I perceive a lack of perspecitve here ;)
I'd trade clarity of implementation for that. (As well as, possibly,
reduced memory use on low-end machines).
next prev parent reply other threads:[~2004-02-11 21:27 UTC|newest]
Thread overview: 43+ messages / expand[flat|nested] mbox.gz Atom feed top
2004-02-04 10:45 lots and lots of disks again Andrew Morton
2004-02-10 11:04 ` Kurt Garloff
2004-02-10 11:26 ` Kurt Garloff
2004-02-10 13:39 ` Christoph Hellwig
2004-02-10 15:47 ` Kurt Garloff
2004-02-10 15:52 ` Christoph Hellwig
2004-02-10 16:08 ` Kurt Garloff
2004-02-10 20:10 ` Andries Brouwer
2004-02-10 20:11 ` Matthew Wilcox
2004-02-10 20:58 ` Kurt Garloff
2004-02-10 21:21 ` viro
2004-02-10 21:34 ` Kurt Garloff
2004-02-10 21:42 ` viro
2004-02-10 22:28 ` Kurt Garloff
2004-02-10 18:26 ` Andrew Morton
2004-02-11 14:56 ` Kurt Garloff
2004-02-11 21:28 ` Andrew Morton [this message]
2004-02-11 22:09 ` Kurt Garloff
2004-02-11 22:29 ` Andrew Morton
2004-02-11 22:53 ` viro
2004-02-12 15:00 ` Kurt Garloff
2004-02-12 15:20 ` James Bottomley
2004-02-12 15:57 ` viro
2004-02-12 16:18 ` Kurt Garloff
2004-02-12 16:43 ` James Bottomley
2004-02-16 12:40 ` Kurt Garloff
2004-02-16 22:57 ` Andries Brouwer
2004-02-17 0:56 ` James Bottomley
2004-02-17 7:57 ` Kurt Garloff
2004-02-17 15:08 ` James Bottomley
2004-02-17 15:28 ` Matthew Wilcox
2004-02-17 14:49 ` Andries Brouwer
2004-02-17 15:18 ` James Bottomley
2004-02-17 15:27 ` Kurt Garloff
2004-02-29 16:41 ` James Bottomley
2004-02-29 23:31 ` Kurt Garloff
2004-03-03 19:30 ` Mike Anderson
2004-03-03 19:55 ` Kurt Garloff
2004-02-17 15:50 ` Andries Brouwer
2004-02-17 17:57 ` James Bottomley
2004-02-17 18:44 ` Andries Brouwer
2004-02-13 0:05 ` Kurt Garloff
2004-02-16 12:31 ` Kurt Garloff
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