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  about 1 year ago by mbrugger | Reply

  I got a tip to look into grub2 multiboot. Maybe we can load the crash kernel to the reserved memory region from grub. We then would only need to pass a kernel argument so that the kernel takes this into account.

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I got a tip to look into grub2 multiboot. Maybe we can load the crash kernel to the reserved memory region from grub. We then would only need to pass a kernel argument so that the kernel takes this into account.
 
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Reply to mbrugger
I got a tip to look into grub2 multiboot. Maybe we can load the crash kernel to the reserved memory region from grub. We then would only need to pass a kernel argument so that the kernel takes this into account.
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## A Second Level Header

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  4 months ago by ptesarik | Reply

  FWIW I was contemplating a similar scheme back in 2016. My idea was to load: 1. kdump kernel 2. kdump initrd 3. production kernel 4. production initrd Then boot into the kdump kernel, update memory maps and kexec to the production kernel. When the production kernel crashes, pass control back to the kdump kernel. For the return to the kdump kernel, I was looking at the KEXEC_PRESERVE_CONTEXT flag, but in the end I doubt it's really helpful without further modifications to the production kernel. At this point, it's probably easier to boot the production kernel first and set up an initial crash kernel at early boot.

  Good luck!

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Edit Comment 8088
# A First Level Header
## A Second Level Header

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FWIW I was contemplating a similar scheme back in 2016. My idea was to load: 1. kdump kernel 2. kdump initrd 3. production kernel 4. production initrd Then boot into the kdump kernel, update memory maps and kexec to the production kernel. When the production kernel crashes, pass control back to the kdump kernel. For the return to the kdump kernel, I was looking at the `KEXEC_PRESERVE_CONTEXT` flag, but in the end I doubt it's really helpful without further modifications to the production kernel. At this point, it's probably easier to boot the production kernel first and set up an initial crash kernel at early boot. Good luck!
 
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Reply to ptesarik
FWIW I was contemplating a similar scheme back in 2016. My idea was to load: 1. kdump kernel 2. kdump initrd 3. production kernel 4. production initrd Then boot into the kdump kernel, update memory maps and kexec to the production kernel. When the production kernel crashes, pass control back to the kdump kernel. For the return to the kdump kernel, I was looking at the KEXEC_PRESERVE_CONTEXT flag, but in the end I doubt it's really helpful without further modifications to the production kernel. At this point, it's probably easier to boot the production kernel first and set up an initial crash kernel at early boot.
Good luck!
---
# A First Level Header
## A Second Level Header

Use one asterisk to *emphasize*

Use two asterisks for **strong emphasis**

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This is an [link to example.com](http://example.com/)

This is an image ![an openSUSE geeko icon](https://en.opensuse.org/images/d/d0/Icon-distribution.png)

This is a user link @hans

This is a project link hw#some-cool-title
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