Bug 461551
| Summary: | initscripts unmounts /usr before calling kexec which needs it... | ||||||||||||
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| Product: | Red Hat Enterprise Linux 5 | Reporter: | Jonathan Peatfield <j.s.peatfield> | ||||||||||
| Component: | kexec-tools | Assignee: | Neil Horman <nhorman> | ||||||||||
| Status: | CLOSED ERRATA | QA Contact: | |||||||||||
| Severity: | low | Docs Contact: | |||||||||||
| Priority: | medium | ||||||||||||
| Version: | 5.2 | CC: | notting, qcai, riek | ||||||||||
| Target Milestone: | rc | ||||||||||||
| Target Release: | --- | ||||||||||||
| Hardware: | All | ||||||||||||
| OS: | Linux | ||||||||||||
| Whiteboard: | |||||||||||||
| Fixed In Version: | Doc Type: | Bug Fix | |||||||||||
| Doc Text: | Story Points: | --- | |||||||||||
| Clone Of: | |||||||||||||
| : | 600608 (view as bug list) | Environment: | |||||||||||
| Last Closed: | 2009-01-20 20:59:54 UTC | Type: | --- | ||||||||||
| Regression: | --- | Mount Type: | --- | ||||||||||
| Documentation: | --- | CRM: | |||||||||||
| Verified Versions: | Category: | --- | |||||||||||
| oVirt Team: | --- | RHEL 7.3 requirements from Atomic Host: | |||||||||||
| Cloudforms Team: | --- | Target Upstream Version: | |||||||||||
| Embargoed: | |||||||||||||
| Attachments: |
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The tools need to be able to work with just /. Assigning to kexec-tools. Created attachment 316198 [details]
patch to statically link zlib
here, please confirm that this fixes the problem for you. Thanks
I take it that this specfile patch is against kexec-tools-1.102pre-21.el5 I'll try rebuilding with that patch applied and see what happens... With a minor tweak to move the --without-zlib outside the %ifarch that seems to work for me... Created attachment 316204 [details]
fix to patch to specfile
Trivial change...
Hmm, configure using --without-zlib results in a very different content of Makefile.conf which seems to be missing all the HAVE_<feature> options in DEFS. I don't know if it really matters - the resulting kexec binary seems to work for me but I may be lucky or it might be a problem on certain platforms. Also since HAVE_ZLIB_H is missing it doesn't link against zlib at all since the function in kexec/kexec.c is #ifdef'd out so slurp_decompress_file() doesn't do any decompression. I don't know if that really matters or not. Here is a terrible hack to leave the configure alone and directly patch the Makefile.conf to add the static-link option... You can probably make this a lot cleaner... Created attachment 316215 [details]
different patch to specfile
edit Makefile.conf after running comnfigure...
Created attachment 316216 [details]
make that a unidiff (doh!)
Comment on attachment 316215 [details]
different patch to specfile
wrong diff options
An advisory has been issued which should help the problem described in this bug report. This report is therefore being closed with a resolution of ERRATA. For more information on therefore solution and/or where to find the updated files, please follow the link below. You may reopen this bug report if the solution does not work for you. http://rhn.redhat.com/errata/RHBA-2009-0105.html |
Description of problem: If using kexec to do a fast reboot on a system where /usr is a different fs than / then the initscripts halt/reboot code will have unmounmted /usr before it attempts to call $kexec_command -e -x Version-Release number of selected component (if applicable): initscripts-8.45.19.EL-1 and earlier How reproducible: 100% Steps to Reproduce: 1. install machine with seperate / and /usr 2. /sbin/kexec -l /boot/vmlinuz-2.6.18-92.1.10.el5 --append="ro root=/dev/ZexSys00/root" --initrd=/boot/initrd-2.6.18-92.1.10.el5.img (or whatever the lines are from your grub config) 3. /sbin/reboot Actual results: it goes throuh the full reboot via the bios despite the kexec code being in the script. Expected results: faster reboot via kexec and no bios Additional info: $ ldd /sbin/kexec linux-gate.so.1 => (0x00aac000) libz.so.1 => /usr/lib/libz.so.1 (0x00fce000) libc.so.6 => /lib/libc.so.6 (0x006c3000) /lib/ld-linux.so.2 (0x0038b000) so perhaps either the script should avoid unmounting /usr or have a copy of libz.so.1 in / Of course it probably only needs libz to load in the kernel/initrd so a stub libz might in fact be enough to allow the call to kexec -e -x to work or maybe it can onlyo load libz if it actually needs functions from it. I've added some debugging to /etc/rc.d/init.d/halt to show that /usr is unmounted before kexec is called but then you can probably see that easily enough without my pathetic hacks. Or I suppose you could just add some docs saying that /, /usr must be on the same fs for reboot to call kexec.