Messages in this thread | | | From | Arnd Bergmann <> | Subject | Re: [PATCH v3 02/31] arm64: Kernel booting and initialisation | Date | Mon, 10 Sep 2012 14:48:20 +0000 |
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On Monday 10 September 2012, Nicolas Pitre wrote: > On Mon, 10 Sep 2012, Arnd Bergmann wrote: > > On Monday 10 September 2012, Catalin Marinas wrote: > > > On Mon, Sep 10, 2012 at 06:53:39AM +0100, Jean-Christophe PLAGNIOL-VILLARD wrote: > > I think a bunch of other architectures can have relocatable kernels, which > > is useful e.g. for kdump. It does imply a small runtime cost and may have > > other disadvantages though. > > Relocatable in physical space is what kdump actually needs, and that's > what we already have here (as well as on ARM32 for that matter with > CONFIG_ARM_PATCH_PHYS_VIRT). Relocatable in the virtual space is costly > and we shouldn't need to go there.
Ah, I see. I thought that the other architectures (powerpc and x86) doing this were actually building with -fPIC, but they do the same kind of early patching that we do.
Arnd
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