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Subject: Re: [Bug #13001] PCI-DMA: Out of IOMMU space
Date: Tue, 28 Apr 2009 14:18:57 +0500
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To: FUJITA Tomonori <fujita.tomonori-Zyj7fXuS5i5L9jVzuh4AOg@public.gmane.org>
Cc: rjw-KKrjLPT3xs0@public.gmane.org, linux-kernel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, kernel-testers-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, grundler-hpIqsD4AKlfQT0dZR+AlfA@public.gmane.org

No, it is regression. I can reproduce that without allowdac and any
other unnecessary boot options. In later discussion Grant Grundler ask
me apply patch that show 32 bit dma devices in my system. Results I
attached to bugreport. Looks like only one 32 bit dma device in my
system is ata controller, sata-nv. I can stable reproduce IOMMU out of
space when I write data to sata drive.

2009/4/28 FUJITA Tomonori <fujita.tomonori-Zyj7fXuS5i5L9jVzuh4AOg@public.gmane.org>:
> On Sun, 26 Apr 2009 11:46:28 +0200 (CEST)
> "Rafael J. Wysocki" <rjw-KKrjLPT3xs0@public.gmane.org> wrote:
>
>> This message has been generated automatically as a part of a report
>> of regressions introduced between 2.6.28 and 2.6.29.
>>
>> The following bug entry is on the current list of known regressions
>> introduced between 2.6.28 and 2.6.29. =C2=A0Please verify if it stil=
l should
>> be listed and let me know (either way).
>>
>>
>> Bug-Entry =C2=A0 =C2=A0 : http://bugzilla.kernel.org/show_bug.cgi?id=
=3D13001
>> Subject =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 : PCI-DMA: =
Out of IOMMU space
>> Submitter =C2=A0 =C2=A0 : =C2=A0<optimusgd-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
>> Date =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0: 2009-04-03 09:30 (24 days o=
ld)
>
> Probably, this is not a regression.
>
> He doesn't hit this problem with 2.6.29 when he uses the kernel boot
> option that he used with 2.6.28. I have no idea how not using
> 'allowdac' can solve the problem though.
>



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