Messages in this thread | | | Date | Thu, 15 May 2014 09:20:24 +0200 | Subject | Re: [PATCH v4 2/8] OF: Introduce DT overlay support. | From | Geert Uytterhoeven <> |
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Hi Pantelis,
On Thu, May 15, 2014 at 9:12 AM, Pantelis Antoniou <pantelis.antoniou@konsulko.com> wrote: >> We also need to think about kexec. Kexec works by sucking the live tree >> out of the kernel and creating a .dtb from it to pass to the new kernel. >> What will the rules be when kexecing? Do all the overlays need to be >> removed, or does the kernel get the tree with all the overlays applied >> (in which case none of the overlays can be removed on the other side of >> kexec). > > We can add a sysfs attribute that configures whether overlays are reverted before > kexec or not. I can't really tell which is the correct option, so let's allow the > policy up to user-space.
Kexec'ing into a new kernel doesn't change the hardware, so IMHO the in-kernel DT should not change.
Gr{oetje,eeting}s,
Geert
-- Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@linux-m68k.org
In personal conversations with technical people, I call myself a hacker. But when I'm talking to journalists I just say "programmer" or something like that. -- Linus Torvalds
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