hpet driver backtraces when hyperthreading enabled
Affects | Status | Importance | Assigned to | Milestone | |
---|---|---|---|---|---|
linux (Ubuntu) |
New
|
Undecided
|
Unassigned | ||
Bug Description
Binary package hint: linux-image-
Ubuntu 9.10 Desktop AMD64
The following appears in dmesg when Hyperthreading is enabled in the BIOS:
[ 1.859689] ------------[ cut here ]------------
[ 1.859695] WARNING: at /build/
[ 1.859697] Hardware name:
[ 1.859698] Modules linked in:
[ 1.859700] Pid: 0, comm: swapper Not tainted 2.6.31-14-generic #48-Ubuntu
[ 1.859701] Call Trace:
[ 1.859706] [<ffffffff8105e
[ 1.859708] [<ffffffff8105e
[ 1.859710] [<ffffffff81034
[ 1.859712] [<ffffffff81034
[ 1.859715] [<ffffffff81085
[ 1.859718] [<ffffffff81086
[ 1.859720] [<ffffffff81086
[ 1.859723] [<ffffffff81085
[ 1.859725] [<ffffffff8152c
[ 1.859728] [<ffffffff8107d
[ 1.859730] [<ffffffff81085
[ 1.859733] [<ffffffff812d7
[ 1.859735] [<ffffffff812d7
[ 1.859737] [<ffffffff812d7
[ 1.859739] [<ffffffff813fe
[ 1.859742] [<ffffffff81010
[ 1.859745] [<ffffffff81523
[ 1.859748] ---[ end trace 24e97c3b18305fae ]---
It does not appear when Hyperthreading is disabled in the BIOS.
I have a strong suspicion that this bug will only appear on Core i7-8xx chips. This is the Nehalem/Lynnfield chip, Socket LGA-1156, with the new P55 Express chipset. There are currently two models: the 860 (2.8 GHz) and the 870 (2.93 GHz). There is a third chip for this socket, the Core i5-750 (2.66 GHz), but it does not support Hyperthreading, so it would not be affected.
lspci is the same with ht disabled