From owner-freebsd-current  Sun Feb 24 11:14:40 2002
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Date: Sun, 24 Feb 2002 20:14:12 +0100 (MET)
From: Magnus B{ckstr|m <b@etek.chalmers.se>
To: Mike Smith <msmith@hub.freebsd.org>
Cc: current@freebsd.org
Subject: Re: HEADS UP: ACPI CA updated
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Wow!  This did away with the once-a-minute error messages from Notify()s
on processor objects on my laptop.

However, I am now getting frequent panics from from a GIANT_REQUIRED
assertion in kmem_malloc().  kmem_malloc() gets called via malloc() from
AcpiOsAllocate(), without Giant locked.

The call to AcpiOsAllocate() happens deep in a AML object evaluation
in from acpi_tz_thread().

I tried naively to modify AcpiOsAllocate to grab Giant before malloc()
and release it afterward, but this appears to be a very bad idea: There
is a mtx_assert(&Giant, MA_NOTOWNED) in ithread_loop() in kern/kern_intr.c
which blows up during boot.

Regards, Magnus


On Fri, 22 Feb 2002, Mike Smith wrote:
> Subject: HEADS UP: ACPI CA updated
>
>
> I've finally updated the ACPI CA codebase with Intel's 20020214 drop
> (yes, I tagged it 0217, my bad).
>
> This is the first drop that Intel haven't asked me not to commit since
> the 20011120 version, so there are a large number of changes and
> bugfixes.  See Intel's logs at
>  http://developer.intel.com/technology/iapc/acpi for more details.
>
> There aren't many changes in the FreeBSD-specific code, this is just
> catching up with major improvements in the interpreter.
>
> As usual, please report any problems or success to the list.
>
> Regards,
> Mike
>
>
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