Messages in this thread | | | From | Andi Kleen <> | Subject | Re: x86_64: 2.6.14-rc4 swiotlb broken | Date | Mon, 17 Oct 2005 18:02:09 +0200 |
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On Monday 17 October 2005 17:56, Muli Ben-Yehuda wrote: > On Mon, Oct 17, 2005 at 05:40:56PM +0200, Andi Kleen wrote: > > First this problem is definitely not critical. AFAIK it only happens on > > scalex's unreleased machines. Intel NUMA x86 machines are really rare > > and on AMD it doesn't happen because the swiotlb is not used there. > > It's not used by default, but there are cases where it's used and it > would be a shame to release a major kernel and knowingly break > them. For example, any setup that used iommu_force or any non-AMD > x86-64 machine with more than 4GB of memory and only 32-bit capable > DMA devices.
... but risk breaking other stuff. Unless you can get the ARM and/or IA64 people to do some retesting with the proposed fixes it's quite risky. Sometimes you have to make compromises before releases.
> Another alternative is to temporarily > provide a different version of swiotlb_init() for x86-64 and IA64 - > I can whip up a patch if that's acceptable.
I don't want that.
-Andi
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