Re: sbs-linux acpi-ec-nospinlock patch for 2.6.11

[Rich Townsend <rhdt-OBnUx95tOyn10jlvfTC4gA@public.gmane.org>]

Yu, Luming wrote:
> I don't know what is acpi-ec-nospinlock patch.
> But the patch at http://bugzilla.kernel.org/show_bug.cgi?id=3851#c52 is worthy testing, if you have EC related issue.
> Thanks,
> Luming

It was a small patch I wrote, to lock EC access using a semaphore rather 
than a spinlock. This was to stop the stuttering caused when the EC 
driver was polling for completion of a transaction.

Eventually, of course, we want to switch over to event-based EC 
management. I already tried one of the older EC/event patches on the 
page you give above, with not much success; but I'll give one of the 
newer ones a shot.

I'm currently also playing around with a patch sent to me by Dmitry 
Torokhov, which I believe was a fork from the EC/event patches. It seems 
to work (in that there is no more stuttering), but there are a lot of 
AE_TIME errors returned by the address-space handler, which screws up 
execution of many DSDT methods that use the EC.

cheers,

Rich


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