Re: [PATCH -mm] kexec jump -v9
From: Pavel Machek
Date: Fri May 16 2008 - 08:12:44 EST
On Fri 2008-05-16 09:48:34, Huang, Ying wrote:
> On Thu, 2008-05-15 at 16:09 -0400, Vivek Goyal wrote:
> > Ok, You want to make BIOS calls. We already do that using vm86 mode and
> > use bios real mode interrupts. So why do we need this interface? Or, IOW,
> > how is this interface better?
> It can call code in 32-bit physical mode in addition to real mode. So It
> can be used to call EFI runtime service, especially call EFI 64 runtime
> service under 32-bit kernel or vice versa.
> The main purpose of kexec jump is for hibernation. But I think if the
> effort is small, why not support general 32-bit physical mode code call
> at same time.
I believe we should focus on kexecing kernels, first.
Only way to prove the effort is small is by having small followup
patch, and that needs the two patches separated...
(cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html
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