linux-kernel - Re: Linux 2.6.23.12

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Date:	Thu, 03 Jan 2008 09:16:55 +0800
From:	Shaohua Li <shaohua.li@...el.com>
To:	Bjorn Helgaas <bjorn.helgaas@...com>
Cc:	Greg Kroah-Hartman <gregkh@...e.de>, linux-kernel@...r.kernel.org,
	Andrew Morton <akpm@...ux-foundation.org>,
	torvalds@...ux-foundation.org, stable@...nel.org,
	Zhao Yakui <yakui.zhao@...el.com>,
	Thomas Renninger <trenn@...e.de>,
	Adam Belay <ambx1@....rr.com>, Len Brown <lenb@...nel.org>
Subject: Re: Linux 2.6.23.12


On Wed, 2008-01-02 at 13:42 -0700, Bjorn Helgaas wrote:
> The patch below was put in 2.6.23.12 as a fix for
> http://bugzilla.kernel.org/show_bug.cgi?id=9514.  It apparently
> does make 9514 go away, but only by coincidence.  There are a
> couple other ideas about fixing 9514.  My proposed patch is
> attached in the bugzilla.
> 
> The .12 patch reduces the number of resources we reserve from
> 24 to 8 ioport regions and from 12 to 4 mmio regions per PNP device.
> It also removes a warning about regions we ignore.
> 
> Obviously, we want to reserve ALL the regions for PNP devices,
> and Thomas is working on a patch for that (which I hope will be
> ready for 2.6.25).  But in the meantime, the .12 patch makes it
> more likely that we will have resource conflicts with PNP devices.
> 
> http://bugzilla.kernel.org/show_bug.cgi?id=9630 appears to be
> such a conflict.
Just let you know why we increase the resource number.
http://bugzilla.kernel.org/show_bug.cgi?id=8973
we found real I/O resource conflict here and cause system hang.

Thanks,
Shaohua

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