linux-kernel - Can I build/test AHCI module on a live system? [was: PMP on Marvell 6121]

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Date:	Thu, 10 Mar 2011 15:39:30 -0800
From:	Konstantin Svist <fry.kun@...il.com>
To:	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
Subject: Can I build/test AHCI module on a live system? [was: PMP on Marvell
 6121]

Is there an easy way of recompiling/trying the AHCI module without 
having to recompile the entire kernel/rebooting?

Thanks


On 03/09/2011 11:28 AM, Konstantin Svist wrote:
> I'm trying to get port multiplier working on Marvell 6121 esata port.
> So far, I've found lkml discussion on how AHCI doesn't seem to support 
> it [1] and verified that it's still the case.
> sata_mv doesn't support it either - I only see the 1st drive in the 
> multiplier
>
> There used to be an official Asus driver called mv_thor [2] for really 
> old versions (2.6.20-something) and someone maintained it until 2.6.27 
> [3].
> The good news is I tried it on 2.6.27 (Fedora 10) and it works!
>
> Questions:
> Can someone who knows how the AHCI driver works take a look at the 
> mv_thor code and figure out why PMP doesn't work in AHCI driver? Most 
> likely it's just some quirk to get the chip initialized...
>
> And since the answer to the previous is most likely "we're too busy, 
> look at it yourself" the followup question is
> Is there an easy way of recompiling/trying the AHCI module without 
> having to recompile the entire kernel/rebooting?
>
> Thanks!
>
>
> [1] http://marc.info/?t=121747549500001&r=1&w=1
> [2] 
> http://en.wikipedia.org/wiki/List_of_Marvell_Technology_Group_chipsets#Linux_SATA_driver
> [3] http://forums.gentoo.org/viewtopic-p-5213724.html#5213724
>
>
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