Re: [Xen-ia64-devel] Re: ia64 kexec: xen -> linux

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

 



On Thu, Sep 28, 2006 at 08:55:22AM +0200, Tristan Gingold wrote:
> Le Jeudi 28 Septembre 2006 03:27, Horms a écrit :
> > On Wed, Sep 27, 2006 at 11:52:12AM +0200, Tristan Gingold wrote:
> > > Linux and xen call efi in real mode if set_virtual_address_map fails.
> > > You may add an option in both xen and linux to force calling efi in real
> > > mode. This should be really simple and you will be able to make progress.
> >
> > Great, I will test this out and see how it goes.
> >
> > > The only possible drawback is performance.
> >
> > What kind of performance issues would you expect?
> Making EFI calls in physical mode is slower: Linux must switch from and to 
> virtual mode.
> 
> However EFI calls are very unfrequent so the impact should be almost nul.

Thats what I was thinking. Lets see how it pans out.

-- 
Horms
  H: http://www.vergenet.net/~horms/
  W: http://www.valinux.co.jp/en/

-
To unsubscribe from this list: send the line "unsubscribe linux-ia64" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at  http://vger.kernel.org/majordomo-info.html

[Index of Archives]     [Linux Kernel]     [Sparc Linux]     [DCCP]     [Linux ARM]     [Yosemite News]     [Linux SCSI]     [Linux x86_64]     [Linux for Ham Radio]

  Powered by Linux