On Sat, 7 Oct 2006 21:57:49 +0000 Pavel Machek wrote: > Hi! > > > 1. Oops offlining cpu twice on AMD64 (but not on EM64t) > > with the 2.6.18-git22 kernel > > > > Reported to hotplug lists 10/05: > > http://lists.osdl.org/pipermail/hotplug_sig/2006-October/000680.html > > > > To recreate: offline, online, and then offline a CPU, then oopses > > http://crucible.osdl.org/runs/2397/sysinfo/amd01.console > > http://crucible.osdl.org/runs/2397/sysinfo/amd01.2/proc/config > > > > Here's a snippet of the oops: > > > > # echo 0 > /sys/devices/system/cpu/cpu1/online > > > > Unable to handle kernel NULL pointer dereference at 0000000000000000 RIP: > > [<ffffffff80255287>] __drain_pages+0x29/0x5f > > PGD 7e56d067 PUD 7ee80067 PMD 0 > > Oops: 0000 [1] PREEMPT SMP > > CPU 0 > > Modules linked in: > > Pid: 7203, comm: bash Tainted: G M 2.6.18-git22 #1 > ~~~~~ > kernel is unhappy here. Forced module unload? Machine check exception. 'G' is Good, same place where 'P' for proprietary would be. But yes, kernel or machine is unhappy. --- ~Randy
