Re: [PATCH] acpi: Avoid dropping rapid hotkey events (or other GPEs)on Asus EeePC

From: Alan Jenkins
Date: Thu Jul 17 2008 - 15:07:25 EST

Henrique de Moraes Holschuh wrote:
> On Thu, 17 Jul 2008, Alan Jenkins wrote:
>> Actually Alexey has another patch in bugzilla (#10919) which resolves
>> this issue in a better way. It avoids polling altogether, which is good
>> because it means you get events immediately. My laptop has backlight
>> adjustment hotkeys with hardware autorepeat, so it looks really jerky
>> with polling.
> We need to get ALL pending events from the EC, whether in polling mode or in
> interrupt mode

> (and we must make sure that we ARE going to queue any new
> interrupt before we stop checking for an empty pending event queue,
> otherwise there is a small window where a new event might get queued, and we
> are still masking the GPE and don't notice it). As long as the fix does
> that, it is all I care :-)
OK, I forgot about that. I need to do some reading on kernel
programming, workqueues in particular, and redo my patch again. Sorry,
Alexey! AFAICS there's still this (very) small window where events could
be dropped.

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