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kirei / flashboot

OpenBSD Flashboot
http://www.mindrot.org/projects/flashboot/
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Large ramdisk on amd64 #15

Closed yellowman closed 10 years ago

yellowman commented 12 years ago

The patch at http://www.nmedia.net/flashrd/amd64_include_pmap_h.diff allows NKL2_KIMG_ENTIRES to be redefined. This gives you ability to set option NKL2_KIMG_ENTRIES=16 in the kernel config. On amd64, NKL2_KIMG_ENTRIES appears to be similar to NKPTP_MIN (i386), as it sets an absolute minimum. The i386 port has a user-definable nkptp option which can be set at boot time, amd64 does not. Setting NKL2_KIMG_ENTRIES=16 allows flashrd to boot with a 3.5MB ramdisk attached to a full GENERIC kernel. It would have a similar effect for flashboot users that want to use the amd64 port.

jschlyter commented 11 years ago

Any updates on this issue?

yellowman commented 11 years ago

amd64 current now sets NKL2_KIMG_ENTRIES to 16 by default. However, nobody ok'ed to make it optionable in the kernel config.

On a side note, there are odd problems with full GENERIC + larger ramdisk (more than 4 or 5MB) on i386 (not affecting amd64). GENERIC + 3.5mb works fine. GENERIC + 5 or 6MB fails with certain drivers (or perhaps that's just a red herring).

jryberg commented 10 years ago

Jacob, I don't know what to do with this. Is this a feature request?

jschlyter commented 10 years ago

Changes to the kernel should be submitted to bugs@openbsd.org.

yellowman commented 10 years ago

OpenBSD committed a change that works. I couldn't get anyone to OK the #ifdef but oh well.