Re: [Fastboot] [RFC] [PATCH 2/2] kdump: cciss driver initialization issue fix

[Maneesh Soni <maneesh@in.ibm.com>]

On Sat, Jun 24, 2006 at 11:13:44AM -0600, Eric W. Biederman wrote:
> Vivek Goyal <vgoyal@in.ibm.com> writes:
> 
> > On Sat, Jun 24, 2006 at 04:30:46AM -0700, Andrew Morton wrote:
> >
> >> > Or is there a generic way to handle these situations? Fixing them driver
> >> > by driver is a long painful process. 
> >> 
> >> Some generic way of whacking a PCI device via the standard PCI registers? 
> >> Not that I know of.
> >
> > Somebody hinted that think of PCI bus reset. But I think PCI bus reset will
> > require firware/BIOS to export a hook to software to so initiate PCI bus
> > reset and I don't think many platforms do that. Infact I am not even aware
> > of one platform who does that.
> 
> Not all pci busses support it but there is a standard pci bus reset bit
> in pci bridges.
> 
> I don't know if it would help but it might make sense to have a config
> option that can be used to mark drivers that are known to have problems,
> in these scenarios.
> 
> CONFIG_BRITTLE_INIT perhaps?
> 
> It would at least make it easier for people to see which drivers
> they don't want to use, and give people some incentive to fix things.
> 

Vivek, 

I think having something as Eric suggested instead of crashboot= is better.
We can hve this config option set for kernel like dump capture
kernel. (CONFIG_CRASH_DUMP=y). This should save some bytes on already longish
kdump kernel boot paramenters.

Thanks
Maneesh