linux-kernel - Re: [ 026/105] ACPI: EC: Make the GPE storm threshold a module parameter

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Date:	Sun, 28 Oct 2012 17:04:40 -0700
From:	Jonathan Nieder <jrnieder@...il.com>
To:	Ben Hutchings <ben@...adent.org.uk>
Cc:	linux-kernel@...r.kernel.org, stable@...r.kernel.org,
	akpm@...ux-foundation.org, alan@...rguk.ukuu.org.uk,
	Feng Tang <feng.tang@...el.com>,
	Len Brown <len.brown@...el.com>
Subject: Re: [ 026/105] ACPI: EC: Make the GPE storm threshold a module
 parameter

Ben Hutchings wrote:

> 3.2-stable review patch.  If anyone has any objections, please let me know.
[...]
> commit a520d52e99b14ba7db135e916348f12f2a6e09be upstream.
>
> The Linux EC driver includes a mechanism to detect GPE storms,
> and switch from interrupt-mode to polling mode.  However, polling
> mode sometimes doesn't work, so the workaround is problematic.
> Also, different systems seem to need the threshold for detecting
> the GPE storm at different levels.

Not an objection, but this is a weird parameter.  How many false
interrupts per transaction should be expected?  Is there some fact
about the hardware or firmware that makes this a well defined number
on each machine?

Thanks,
Jonathan
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