Re: Reading EeePC900 battery info causes stalls

[Alexey Starikovskiy <aystarik@gmail.com>]

Sitsofe Wheeler wrote:
> Alexey Starikovskiy wrote:
>> acpi_ps_parse_aml() is called not so often (~10000usec), so maybe it 
>> is a "sweet spot"
>
> The latency is pretty bad with this patch (assuming you did not want 
> it applied on top of your previous patch)
>
> Here's the tail end of a full trace:
> http://sucs.org/~sits/test/eeepc-debug/20080925/1250/latency_trace_all_tail.gz 
> (3.3Mbytes but close 100Mbytes when decompressed)
>  latency: 2912285 us, #1000038/5344107, CPU#0 | (M:desktop VP:0, KP:0, 
> SP:0 HP:0
> )
>
> Here's a complete (but filtered) trace:
> http://sucs.org/~sits/test/eeepc-debug/20080925/1250/latency_trace.gz
>  latency: 315814 us, #227600/227600, CPU#0 | (M:desktop VP:0, KP:0, 
> SP:0 HP:0)
>
Ok, let's stick with previous patch then.
It will be somewhat difficult to push though, because the code we 
touched belongs to ACPICA (multi-platform code),
so should not contain explicit Linux-only operands.
If you agree that the place is right, I'll make proper patch with all 
needed redirections to
make ACPICA happy.