On Thu, 04 Jan 2007 22:02:00 PST, Andrew Morton said: > ftp://ftp.kernel.org/pub/linux/kernel/people/akpm/patches/2.6/2.6.20-rc3/2.6.20-rc3-mm1/ One of these 3 patches: rewrite-lock-in-cpufreq-to-eliminate-cpufreq-hotplug-related-issues.patch rewrite-lock-in-cpufreq-to-eliminate-cpufreq-hotplug-related-issues-fix.patch ondemand-governor-restructure-the-work-callback.patch causes an oops in kref_put during early boot ("unable to handle paging request at 00078"). Dell Latitude D820 laptop, Core2 T7200 with a 64-bit kernel. Hand-copied trace of the oops: kobject_put+0x19/0x1b cpufreq_cpu_put+0xd/0x1e cpufreq_get+0x45/0x51 handle_cpufreq_delayed_get+0x1e/0x41 run_workqueue+0x9c/0x14e worker_thread+0x0/0x145 worker_thread+0x10e/0x145 default_wake_function+0x0/0xf worker_thread+0x0/0x145 kthread+0x8/0x10b schedule_tail+0x38/0xa1 child_rip+0xa/0x12 kthread+0x0/0x10b child_rip+0x0/0x12 With the 3 listed patches plus: ondemand-governor-use-new-cpufreq-rwsem-locking-in-work-callback.patch reverted, the system boots OK. This ring any bells?
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