Mark Lord wrote:
quoted text
> Jeff Garzik wrote:
>> Paolo Ornati wrote:
>>> I have this problem only with XFS, and even with XFS it goes away
>>> mounting with "nobarrier"...
>>
>> This last is an interesting datapoint.
>>
>> I wonder if libata has a generic problem with NCQ + FLUSH CACHE.
> 
> Yeah, that's pretty suspicious.  Prior to issuing a FLUSH_CACHE op,
> one must first drain all outstanding NCQ commands (and not issue new ones).
> 
> I'm sure the code must *try* to do that, but perhaps there's a bug in
> there?
> Or just another drive bug?

If there was such a bug, the aborted commands list should contain both
FPDMA commands and FLUSH commands.  I don't think command filtering
itself is broken.  Possibly another quirky firmware but it's strange
that this is the only Seagate drive showing this problem.

Thanks.

-- 
tejun
-
unsubscribe notice
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/