On Tue, Jan 07, 2014 at 10:34:06AM +0800, Dave Young wrote: > Hi, all > > I have a question in mind: can we copy and prepare kexec kernel while > normal booting? > > Just like below wild idea: > > Kernel uncompress itself (assume kernel is relocatable) > -> copy the kernel image somewhere for backup > -> reserver crashkernel memory > -> copy the backuped kernel image/initrd image to reserved memory > -> copy the purgatory which can be embedded in elf section? > -> prepare the e820 memory ranges which is for kdump kernel > > So userspace only need to call kexec reboot, kexec_load is not necessary. > The initrd for kdump should be different, but we can add some different logic > which will be only for kdump and it can be skipped in normal boot. > > Is it doable? What's the advantage of doing all this? Why are you trying to skip load step. Thanks Vivek
