On Tue, Sep 23, 2008 at 01:32:19PM -0700, Jay Lan wrote: > Neil Horman wrote: > > On Tue, Sep 23, 2008 at 09:41:50AM -0700, Jay Lan wrote: > >> Simon Horman wrote: > >>> On Wed, Sep 17, 2008 at 02:07:15PM -0700, Jay Lan wrote: > >>>> Hi, > >>>> > >>>> My root disk was populated with sles10sp2, but the kernel was > >>>> 2.6.27-rc5 and /sbin/kexec was built from 2.0.0 version. > >>>> > >>>> Many times when kdump kernel failed early i found after reboot that > >>>> /sbin/kexec became zero size. There was no warning on executing > >>>> '/etc/init.d/kdump start' when /sbin/kexec is zero size. I have > >>>> no idea when and how that happened. > >>>> > >>>> Has anyone else seen this problem? > >>> Is it possible that this is caused by filesystem corruption? > >> I found the problems, which i can not reliably reproduce, happened > >> when i ran into kdump kernel boot failure (yet not every time.) > >> What puzzled me was why only /sbin/kexec was affected. > >> > > This is why most kdump implementations capture vmcore from an initramfs, since > > a crash means that you may not be able to trust the integrity of the filesystems > > that were mounted before the panic. > > > > > >> I can not explain what caused it (otherwise i would be able to > >> reproduce it) and do not know where my finger should point to. ;) > >> The good news is since i fixed the kernel boot problem it has not > >> happened any more. > >> > >> The distros probably can add a check against zero-sized kexec > >> in /etc/init.d/kdump script though. > >> > > Theres really not a need to. Filesystems can be corrupted by crashes, thats why > > we capture cores from the initrd. We need to be able to trust the rest of the > > system to scan filesystems and do their best to recover when filsystems loose > > data. > > Hi Neil, > > Which rhel release starts doing this? > > Thanks, > - jay > Its always been that way. Neil > > > > > Regards > > Neil > > > >> Thanks, > >> - jay > >> > >> > >> _______________________________________________ > >> kexec mailing list > >> kexec at lists.infradead.org > >> http://lists.infradead.org/mailman/listinfo/kexec > > > > > _______________________________________________ > kexec mailing list > kexec at lists.infradead.org > http://lists.infradead.org/mailman/listinfo/kexec >
