Re: [Xen-devel] [PATCH] AMD IOMMU: Use global interrupt remapping table by default

[George Dunlap <George.Dunlap@xxxxxxxxxxxxx>]

On Thu, Jul 21, 2011 at 11:38 AM, Wei Wang2 <wei.wang2@xxxxxxx> wrote:
> On Thursday 21 July 2011 11:07:40 George Dunlap wrote:
>> On Wed, Jul 20, 2011 at 4:56 PM, Wei Wang2 <wei.wang2@xxxxxxx> wrote:
>> > George & Ian,
>> > Patch attached. This patch removes global interrupt remapping table and
>> > uses per-device table instead. This should work with per-cpu IDTs.  We
>> > are safe to remove global table since SATA device id issue dose not
>> > appear in recent production BIOS.
>>
>> Exactly how "recent" are these BIOSes?  Or I guess alternately, how
>> old are the BIOSes that broke?
>
> George,
> Actually, we encountered this issue about 2 years ago and fixed this in BIOS.
> There should be very less productions shipped the mark at that time (probably
> none) and all newer products after that should absorb this fix. Even without
> BIOS fix, user can always disable IDE mode from BIOS menu manually if they
> were hit by this issue. So basically, I think removing global table is also
> reasonable.

Sounds reasonable to me.

Acked-by: George Dunlap <george.dunlap@xxxxxxxxxxxxx>

> Thanks
> Wei
>
>> We still have customers who seem to have hardware that's several years
>> old; if the answer isn't something like "8 years", it may be better to
>> just change the default setting.
>>
>>  -George
>
>
>
>
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