kernel config

kernel config

[James]

 CONFIG_SATA_AHCI
│ This option enables support for AHCI Serial ATA. │
│ │
│ If unsure, say N.

CONFIG_ATA_SFF: │
│ │
│ This option adds support for ATA controllers with SFF │
│ compliant or similar programming interface. │
│ │
│ SFF is the legacy IDE interface that has been around since │
│ the dawn of time. Almost all PATA controllers have an │
│ SFF interface. Many SATA controllers have an SFF interface │
│ when configured into a legacy compatibility mode. │
│ │
│ For users with exclusively modern controllers like AHCI, │
│ Silicon Image 3124, or Marvell 6440, you may choose to │
│ disable this unneeded SFF support.


I recently configured and compiled the 2.6.35.1 kernel.
I suggest moving
│
│ For users with exclusively modern controllers like AHCI, │
│ Silicon Image 3124, or Marvell 6440, you may choose to │
│ disable this unneeded SFF support.
to the CONFIG_SATA_AHCI option.

Re: kernel config

[Brian Waters]

If you think this is a good idea, then you should try submitting a
patch for it. The file you want to modify is drivers/ata/Kconfig. It
should be pretty obvious what to change. There is lots of info online
about creating patches.

- Brian Waters




On Wed, Aug 11, 2010 at 1:18 PM, James <bjlockie@lockie.ca> wrote:
>  CONFIG_SATA_AHCI
> │ This option enables support for AHCI Serial ATA. │
> │ │
> │ If unsure, say N.
>
> CONFIG_ATA_SFF: │
> │ │
> │ This option adds support for ATA controllers with SFF │
> │ compliant or similar programming interface. │
> │ │
> │ SFF is the legacy IDE interface that has been around since │
> │ the dawn of time. Almost all PATA controllers have an │
> │ SFF interface. Many SATA controllers have an SFF interface │
> │ when configured into a legacy compatibility mode. │
> │ │
> │ For users with exclusively modern controllers like AHCI, │
> │ Silicon Image 3124, or Marvell 6440, you may choose to │
> │ disable this unneeded SFF support.
>
>
> I recently configured and compiled the 2.6.35.1 kernel.
> I suggest moving
> │
> │ For users with exclusively modern controllers like AHCI, │
> │ Silicon Image 3124, or Marvell 6440, you may choose to │
> │ disable this unneeded SFF support.
> to the CONFIG_SATA_AHCI option.
> --
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Re: kernel config

[Cliff White]

> Cliff
> 
> Thanks for your input. I've checked the tests you ran and found that the kernel 
> config was set at default which means preemptible and low latency were 
> disabled. I dont see a way of changing the kernel config, and I need these 
> enabled in the tests. Suggestions?
> 
> Regards,
> Con Kolivas
> 
> 
Thanks for the thanks. We don't have a way to tweak the .config per test 
currently.
The .config is adjusted automagically for the machine type.
However, there is a workaround. The PLM supports chains of patches, so you
could do a short diff from -ck3 with only the switch changes, and that
can be applied to -ck3 (PLM #768) automagically by the PLM. 
If you aren't yet up on the PLM, i'd be glad to do the submitting if you
send me the diff.
cliffw