Messages in this thread | | | Subject | RE: [ACPI] ACPI owner_id limit too low | Date | Thu, 8 Dec 2005 15:18:30 -0800 | From | "Moore, Robert" <> |
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If you felt ambitious, you could take a look at making the change to not allocate owner IDs for the static tables (tables that cannot be unloaded). This would really take the pressure off the Owner ID. Requires a change to the shutdown mechanism to make sure that the namespace is completely deleted.
> -----Original Message----- > From: Alex Williamson [mailto:alex.williamson@hp.com] > Sent: Thursday, December 08, 2005 2:21 PM > To: Moore, Robert > Cc: Brown, Len; linux-kernel@vger.kernel.org; acpi- > devel@lists.sourceforge.net > Subject: RE: [ACPI] ACPI owner_id limit too low > > On Thu, 2005-12-08 at 14:03 -0800, Moore, Robert wrote: > > We have increased the number of owner IDs to 255 in the most recent > > version of ACPICA, 20051202. This should hit Linux soon. > > > > Additionally, we plan to conserve OwnerIDs by not using them for tables > > that can never be unloaded, to be implemented in a future release. > > However, 255 Ids should be plenty for now. > > > > Here is the text from the release memo: > > > > Increased the number of available Owner Ids for namespace object > > tracking from 32 to 255. This should eliminate the OWNER_ID_LIMIT > > exceptions seen on some machines with a large number of ACPI tables > > (either static or dynamic). > > Hi Bob, > > Sorry if I wasn't clear, I'm worried about what happens in the > interim. The problem will be fixed in ACPICA 20051202, but we have at > least one, likely two stable kernels that will be tagged before that > ACPICA version hits the upstream kernel. We can hit the owner_id limit > fairly easily on a few development systems. How many stable kernels do > we want out in the wild with such a low owner_id limit? Bumping it up > to 64, while not ideal, is sufficient for our current usage, and I think > the patch is trivial enough that it could be included quickly. Thanks, > > Alex > > -- > Alex Williamson HP Linux & Open Source Lab
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