very common kernel modules slow down the boot process

Dave Airlie airlied at redhat.com
Wed Apr 2 06:54:36 UTC 2008


On Wed, 2008-04-02 at 02:52 -0400, Dave Jones wrote:
> <dropped kernel-maint from cc. That's the default bug assignee,
>  which is somewhat strange to cc>
> 
> On Wed, Apr 02, 2008 at 02:41:58AM -0400, Chris Snook wrote:
> 
>  > It also makes it much more difficult to troubleshoot those subsystems or 
>  > work around their quirks.  I wouldn't have a problem with ext3, jbd, or 
>  > dm_* being built-in, but anything that deals with hardware should really 
>  > be modular.  Of course, that wipes out most of your list.
>  > 
>  > I'd really rather focus on optimizing modprobe than sacrificing the many 
>  > benefits of modularity for a very small performance boost.
> 
> There's another reason why usb hcd's were proposed to be built-ins.
> We may get to use usb-serial for logging boot messages if we do so.
> (and also build-in the relevant usb-serial modules).
> 
> given the absense of serial ports on a lot of modern machines, this
> may prove to be useful.
> 

Useful for watching the usb-serial module oops :-P

Dave.




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