System unresponsive during HDD activity

[Konstantin Svist]

  On 09/18/2010 03:06 AM, Gilboa Davara wrote:
> On Sat, 2010-09-18 at 01:36 -0700, Konstantin Svist wrote:
>> On 09/17/2010 12:41 PM, Gilboa Davara wrote:
>>> Your SATA seems to be configured to work in IDE compatibility mode.
>>
>> You were right, I found a mention of my chipset and a patch
>> (http://www.codon.org.uk/~mjg59/tmp/ahci_quirk_cleanup.diff)
>> After compiling the kernel with it, the chipset is now running with ahci
>> driver. That enabled NCQ and improved some fio benchmarks, but looks
>> like the lag during svn up is still present.
>> Still, some improvement is a good thing.
>>
> I'd suggest you file a bug report in http://bugzilla.redhat.com and ask
> that this patch will be included. Make sure you post the complete
> hardware configuration in the bug report.
> Looking at the code, I don't see any huge reason that this patch (minus
> some cleanup) won't find it way into the kernel. (Though, I'd check
> http://bugzilla.kernel.org and see if its already in-line for inclusion
> in the up stream kernel.)
>
> - Gilboa
>
>


It turns out that if AHCI mode is enabled, my DVD drive disappears. 
Apparently with normal kernel, it's detected as PATA - and with the 
patch not detected at all.
Figures