Re: microcode loading got really slow.

From: Dave Jones
Date: Thu May 23 2013 - 10:48:17 EST

On Thu, May 23, 2013 at 04:36:20PM +0200, Takashi Iwai wrote:

> > >> Also udev supports user-defined rules to load firmware, which
> > >> means some drivers may not put their firmware in the default
> > >> path of distribution's firmware.
> > >
> > > It's why I suggested to put a warning in that path as the first step.
> > > So we can see whether there is any actual user.
> >
> > If you plan to do it, it'd better to add default firmware path of some
> > distributions into firmware_class.c first, otherwise it may cause
> > unnecessary noise for this distribution.
> >
> > But if more default search paths are added, it might cause mistaken
> > firmwares found under incorrect path, for example, android's
> > default path is "/etc/firmware" and "/vendor/firmware"(maybe different
> > for different versions).
> >
> > Also, putting default search paths into kernel isn't good, which was
> > introduced unwillingly for well-known reason.
> Maybe we can create a new Kconfig to specify non-standard firmware
> path?

You keep mentioning non-standard paths for firmware, but in this case,
I don't think Fedora is doing anything unusual. We have microcode firmware
in /lib/firmware/intel-ucode/ just like (afaik) everyone else.

What *is* happening, I think is that the CPU is new enough that there's no
newer firmware file available for it.



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