Re: [PATCH] PCI: Add pci=safemode option

[okaya@codeaurora.org]

On 2018-05-30 00:48, Greg Kroah-Hartman wrote:
> On Wed, May 30, 2018 at 12:44:29AM -0700, okaya@codeaurora.org wrote:
>> On 2018-05-30 00:37, Christoph Hellwig wrote:
>> > On Tue, May 29, 2018 at 09:41:33PM -0700, Sinan Kaya wrote:
>> > > Bjorn and I discussed the need for such a "safe" mode feature when you
>> > > want to bring up PCI for a platform. You want to turn off everything
>> > > as
>> > > a starter and just stick to bare minimum.
>> >
>> > Can we please make it a config option the instead of adding code
>> > to every kernel?  Also maybe the bringup should be in the name
>> > to make this more clear?
>> 
>> One other requirement was to have a runtime option rather than compile 
>> time
>> option.
>> 
>> When someone reported a problem, we wanted to be able to say "use this
>> option and see if system boots" without doing any bisects or 
>> recompilation.
>> 
>> This would be the first step in troubleshooting a system to see if
>> fundamental features are working.
> 
> That makes sense, people can not rebuild their kernels for the most
> part.  Putting it behind a config option would not make sense as it
> would always have to be enabled.
> 

Here is where the discussion took place. Last 5-10  messages should 
help.


https://bugzilla.kernel.org/show_bug.cgi?id=196197


>> I don't mind changing the name Bjorn mentioned safe option. I made it
>> safemode. I am looking at Bjorn for suggestions at this moment.
> 
> "minimal"?  "basic"?  "crippled"?
> "my_hardware_is_so_borked_it_needs_this_option"?  :)
> 
> Naming is hard...
> 
> greg k-h