Bug 1302024
| Summary: | netbsd ELF image doesn't get boot command line | ||
|---|---|---|---|
| Product: | Red Hat Enterprise Linux 6 | Reporter: | Karel Volný <kvolny> |
| Component: | grub | Assignee: | David Kaspar // Dee'Kej <deekej> |
| Status: | CLOSED WONTFIX | QA Contact: | Release Test Team <release-test-team-automation> |
| Severity: | unspecified | Docs Contact: | |
| Priority: | unspecified | ||
| Version: | 6.7 | CC: | pholica |
| Target Milestone: | rc | ||
| Target Release: | --- | ||
| Hardware: | Unspecified | ||
| OS: | Unspecified | ||
| Whiteboard: | |||
| Fixed In Version: | Doc Type: | Release Note | |
| Doc Text: |
TBD
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Story Points: | --- |
| Clone Of: | Environment: | ||
| Last Closed: | 2016-10-13 12:48:12 UTC | Type: | Bug |
| Regression: | --- | Mount Type: | --- |
| Documentation: | --- | CRM: | |
| Verified Versions: | Category: | --- | |
| oVirt Team: | --- | RHEL 7.3 requirements from Atomic Host: | |
| Cloudforms Team: | --- | Target Upstream Version: | |
| Embargoed: | |||
| Bug Depends On: | |||
| Bug Blocks: | 1356056 | ||
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Description
Karel Volný
2016-01-26 14:32:51 UTC
Nobody requested this feature, so I didn't spend time on it, but it should work even without re-compilation. IIRC it uses BIOS calls so it's abilities are quite limited, e.g. it only supports ttyS0 and ttyS1 and supported speeds may be also limited. I will check. It works for me in VirtualBox if recompiled memtest with serial port enabled (used default 9k6, this is safe for most BIOSes), but it doesn't work with the command line, I will check why. Maybe it is not compatible with the way how grub legacy hands over the command line, or maybe it has never worked (this wouldn't surprised me :) I will look on it. (In reply to Jaroslav Škarvada from comment #6) > or maybe it has never worked > (this wouldn't surprised me :) well, googling for help, I have found that at least Ubuntu used to have two boot options for memtest in grub, one with serial support and without, so I'd hope that someone was using that - i.e. that it worked ... cool, trying on Fedora, I'm not even able to recompile memtest ... the last error message is: lib.o: In function `check_input': lib.c(.text+0x17be): undefined reference to `reboot' I traced it down and the command line is not handed by bootloader. This observation matches with the grub documentation [1]: "For now, however, GRUB doesn't allow you to pass kernel parameters" To be honest I don't know whether it is possible with ELF at all (e.g. by using different bootloader). But grub RFE could be filled. We cannot switch from ELF to binary image: - due to backward compatibility in RHEL. - loading of memtest86+ binary image is unreliable We cannot enable serial console by default due to slow down of the test. The only way how to get serial console working now is recompilation of memtest86+. [1] https://www.gnu.org/software/grub/manual/legacy/grub.html#NetBSD It's unfixable at the moment in memtest86+. It would require changing from ELF boot image to e.g. binary image and rewriting the code / adding workarounds to work correctly when booted from the grub. It's something we shouldn't do during distribution life-time. Reassigning to grub for further investigation if it is possible to add command line support to netbsd ELF booting. Reproducer: 1) set command line in grub 2) boot ELF netbsd image (with 'kernel --type=netbsd') Actual result: Command line is not handed to boot image Expected result: Command line handed to boot image Additional info: I am not sure whether it is possible. Reassigning to grub for further investigation, because in the doc [1], there is written: "For now, however, GRUB doesn't allow you to pass kernel parameters" which implies to me that there should be a way how to do it. [1] https://www.gnu.org/software/grub/manual/legacy/grub.html#NetBSD Hello, I'm sorry, but this classifies as RFE, and since we are in the phase 2 of RHEL6 lifecycle, no RFEs are allowed by default. In case you need this functionality, you could try using grub2 instead. Best regards, David |