On Fri, 30 Sep 2011, Michel Lespinasse wrote: > On Fri, Sep 30, 2011 at 11:19 AM, Eric B Munson <emunson@xxxxxxxxx> wrote: > > I am able to recreate on a second desktop I have here (same model CPU but a > > different MB so I am fairly sure it isn't dying hardware). It looks to me like > > a CPU softlocks and it stalls the process active there, so most recently that > > was XOrg. The machine lets me login via ssh for a few minutes, but things like > > ps and cat or /proc files will start to work and give some output but hang. > > I cannot call reboot, nor can I sync the fs and reboot via SysRq. My next step > > is to setup a netconsole to see if anything comes out in the syslog that I > > cannot see. > > I haven't had time to try & reproduce locally yet (apologies - things > have been coming up at me). > > But a prime suspect would be a bad interaction with > CONFIG_MEMORY_HOTPLUG, as Kamezama remarked in his reply to patch 4. I > think this could be the most likely cause of what you're observing. > CONFIG_MEMORY_HOTPLUG seems to be the responsible party here, I disabled it in my config and have been able to build 6 kernels straight without a hang.
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