Re: [RFC] aic94xx: attaching to the sas transport class

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On Thu, 2 Mar 2006 20:16:20 -0600 Mark Rustad wrote:

> On Mar 2, 2006, at 5:13 PM, Mike Anderson wrote:
> 
> > James Bottomley <James.Bottomley@xxxxxxxxxxxx> wrote:
> >> This fairly minimal patch correctly attaches the aic94xx driver to  
> >> the
> >> SAS transport class (The driver is available from
> >>
> >> www.kernel.org/git/jgarzik/sas-2.6
> >>
> >> ).  Unfortunately, the driver itself still has the following critical
> >> issues
> >>
> >> 1. Discovery order is non-deterministic (it starts one thread per  
> >> port,
> >> so the threads race for discovery)
> >
> > The issue also results in the device discovery not completing by  
> > the time
> > the module load completes resulting in the initrd not finding the boot
> > disk
> > http://bugzilla.kernel.org/show_bug.cgi?id=6045
> >
> > I agree that we need a solution for this. Should the solution be in  
> > the
> > LLDDs.I thought previous comments was that we wanted this fixed  
> > outside
> > the kernel in user space. Though I have not seen any enabled  
> > support in
> > initrds or support in the initrd bins.
> >
> > This appears to not only be an issue with aic94xx as it appears  
> > this could
> > happen with some of the fc transport LLDDs.
> 
> It also is a problem for usb-storage devices. I have to use a kernel  
> parameter of "boot_delay=7" for my USB root device to be available.  
> Fine for my system, but ugly in general.

where is that kernel boot option, pray tell?
I don't seem to be able to find it.

---
~Randy
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