ACPI issue in 7-current ?

Nate Lawson nate at
Thu Aug 11 17:05:58 GMT 2005

John Baldwin wrote:
> On Wednesday 10 August 2005 11:41 am, Khetan Gajjar wrote:
>>I've been running a 6-current box which I upgraded recently to 7.
>>At the same time, I disabled WITNESS and INVARIANTS in the kernel.
>>I've noticed the machine doing some very weird things ever since.
> Looks like the locking in acpi_tz is rather busted as it has tried to hold a 
> mutex across kthread_create() which is not ok.  That is where the LOR's come 
> from at least.  I'm not sure if that is the cause of your other problems 
> though.
>>acpi_tz0: <Thermal Zone> on acpi0
>>malloc(M_WAITOK) of "PROC", forcing M_NOWAIT with the following
>>non-sleepable lo cks held:
>>exclusive sleep mutex ACPI thermal zone r = 0 (0xc0859d20) locked @

Too late, it was introduced by the passive cooling commit and fixed a 
while ago by ume at .


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