Messages in this thread Patch in this message | | | Date | Mon, 17 Aug 2020 15:42:24 +0200 | From | Pavel Machek <> | Subject | Re: [PATCH 1/2] kexec: Add quick kexec support for kernel |
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Hi!
> +config QUICK_KEXEC > + bool "Support for quick kexec" > + depends on KEXEC_CORE > + help > + Say y here to enable this feature.
?
> + It use reserved memory to accelerate kexec, just like crash
uses
> + kexec, load new kernel and initrd to reserved memory, and > + boot new kernel on that memory. It will save the time of > + relocating kernel.
loads a new.... boots new...
> IORES_DESC_DEVICE_PRIVATE_MEMORY = 6, > IORES_DESC_RESERVED = 7, > IORES_DESC_SOFT_RESERVED = 8, > +#ifdef CONFIG_QUICK_KEXEC > + IORES_DESC_QUICK_KEXEC = 9, > +#endif > };
Remove ifdef.
> /* > diff --git a/include/linux/kexec.h b/include/linux/kexec.h > index 9e93bef52968..976bf9631070 100644 > --- a/include/linux/kexec.h > +++ b/include/linux/kexec.h > @@ -269,9 +269,12 @@ struct kimage { > unsigned long control_page; > > /* Flags to indicate special processing */ > - unsigned int type : 1; > + unsigned int type : 2; > #define KEXEC_TYPE_DEFAULT 0 > #define KEXEC_TYPE_CRASH 1 > +#ifdef CONFIG_QUICK_KEXEC > +#define KEXEC_TYPE_QUICK 2 > +#endif > unsigned int preserve_context : 1;
Here, too.
> +++ b/include/uapi/linux/kexec.h > @@ -12,6 +12,9 @@ > /* kexec flags for different usage scenarios */ > #define KEXEC_ON_CRASH 0x00000001 > #define KEXEC_PRESERVE_CONTEXT 0x00000002 > +#ifdef CONFIG_QUICK_KEXEC > +#define KEXEC_QUICK 0x00000004 > +#endif > #define KEXEC_ARCH_MASK 0xffff0000
And here.
Pavel
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