Re: [patch 3/3] ata: SWNCQ should be enabled by default

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Zoltan Boszormenyi wrote:
Tejun Heo írta:
akpm@xxxxxxxxxxxxxxxxxxxx wrote:
From: Zoltan Boszormenyi <zboszor@xxxxxxxxxx>

unchangelogged patch.

Signed-off-by: Zoltan Boszormenyi <zboszor@xxxxxxxxxx>
Cc: Robert Hancock <hancockr@xxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>

Nacked-by: Tejun Heo <htejun@xxxxxxxxx>

Sorry, there are remaining issues to resolve before enabling ADMA by default.

Sorry, this is NOT ADMA. SWNCQ is completely independent from ADMA.

Heh, right. Sorry about that. I disabled ADMA on the distro I work for and somehow ADMA was disabled on mainline too. :-)

Robert, is SWNCQ safe to turn on by default? I personally think it's better to prefer safety over performance or optional features and given the history of NCQ support on nv satas, I feel a bit more cautious.

Maybe we can enable SWNCQ on -mm and devel branches and disable it late in release cycle for 2.6.26 for a trial?

Kuan Luo and Peer Chen, what do you guys think about this? And can you guys please find a way to assist Robert in fixing the ADMA problems? For 2.6.25, we're too late to disable it. For 2.6.26, I'm afraid we will have to disable it unless those known issues are solved. :-(

Thanks.

--
tejun
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