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Message-Id: <1199323015.16091.1.camel@sli10-desk.sh.intel.com>
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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