linux-kernel - Re: [patch 6/8] PNP: replace pnp_resource_table with dynamically allocated resources

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Date:	Tue, 13 May 2008 19:42:41 -0700
From:	Andrew Morton <akpm@...ux-foundation.org>
To:	Bjorn Helgaas <bjorn.helgaas@...com>
Cc:	Len Brown <lenb@...nel.org>, linux-acpi@...r.kernel.org,
	linux-kernel@...r.kernel.org, Adam Belay <ambx1@....rr.com>,
	Adam M Belay <abelay@....edu>,
	Li Shaohua <shaohua.li@...el.com>,
	Matthieu Castet <castet.matthieu@...e.fr>,
	Thomas Renninger <trenn@...e.de>,
	Rene Herman <rene.herman@...access.nl>,
	Jaroslav Kysela <perex@...ex.cz>
Subject: Re: [patch 6/8] PNP: replace pnp_resource_table with dynamically
 allocated resources

On Mon, 05 May 2008 16:36:36 -0600 Bjorn Helgaas <bjorn.helgaas@...com> wrote:

> PNP used to have a fixed-size pnp_resource_table for tracking the
> resources used by a device.  This table often overflowed, so we've
> had to increase the table size, which wastes memory because most
> devices have very few resources.
> 
> This patch replaces the table with a linked list of resources where
> the entries are allocated on demand.
> 
> This removes messages like these:
> 
>     pnpacpi: exceeded the max number of IO resources
>     00:01: too many I/O port resources
> 
> References:
> 
>     http://bugzilla.kernel.org/show_bug.cgi?id=9535
>     http://bugzilla.kernel.org/show_bug.cgi?id=9740
>     http://lkml.org/lkml/2007/11/30/110
> 
> This patch also changes the way PNP uses the IORESOURCE_UNSET,
> IORESOURCE_AUTO, and IORESOURCE_DISABLED flags.

This patch kills my prehistoric dual PIII.

http://userweb.kernel.org/~akpm/p5135912.jpg
http://userweb.kernel.org/~akpm/config-vmm.txt
http://userweb.kernel.org/~akpm/dmesg-vmm.txt
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