Messages in this thread | | | Date | Fri, 10 Jun 2005 11:25:15 -0700 | From | Andrew Morton <> | Subject | Re: Race condition in module load causing undefined symbols |
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Stephen Lord <lord@xfs.org> wrote: > > I am having troubles getting any recent kernel to boot successfully > on one of my machines, a generic 2.6GHz P4 box with HT enabled > running an updated Fedora Core 3 distro. This is present in > 2.6.12-rc6. It does not manifest itself with the Fedora Core > kernels which have identical initrd contents as far as the > init script and the set of modules included goes. > > The problem manifests itself as various undefined symbols from > module loads.
Peculiar. Module loading is all synchronous, isn't it?
> ... > The failures are different on different boots, sometimes the ata_piix > module cannot find symbols from libata, sometimes ext3 cannot find jbd > symbols, sometimes dm modules cannot find things from dm-mod, usually > it is a combination of these. End result is a panic when it cannot > find the root device. > > From the behavior, it appears that a module load is returning > control to user space before the previous one has got its symbols > loaded.
I wonder if rather than the intermittency being time-based, it is load-address-based? For example, suppose there's a bug in the symbol lookup code?
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