Re: [PATCH] x86_64: make GART PTEs uncacheable

2007-04-23 Thread Andi Kleen
On Monday 23 April 2007 11:45:11 Joachim Deguara wrote: > I can work on that as a side note, but while the GART IOMMU is still in the > kernel then we need this fix. If it's too slow we can just use swiotlb instead. Probably while enlarging it. -Andi - To unsubscribe from this list: send the

Re: [PATCH] x86_64: make GART PTEs uncacheable

2007-04-23 Thread Joachim Deguara
On Monday 23 April 2007 11:32, Andi Kleen wrote: > On Monday 23 April 2007 11:14:10 Joachim Deguara wrote: > > This patches fixes the silent data corruption problems being seen using > > the GART iommu where 4kB of data where incorrect (seen mostly on Nvidia > > CK804 systems). > > Performance

Re: [PATCH] x86_64: make GART PTEs uncacheable

2007-04-23 Thread Andi Kleen
On Monday 23 April 2007 11:14:10 Joachim Deguara wrote: > This patches fixes the silent data corruption problems being seen using the > GART iommu where 4kB of data where incorrect (seen mostly on Nvidia CK804 > systems). Performance numbers? How much slower does this make this? Is it still

[PATCH] x86_64: make GART PTEs uncacheable

2007-04-23 Thread Joachim Deguara
This patches fixes the silent data corruption problems being seen using the GART iommu where 4kB of data where incorrect (seen mostly on Nvidia CK804 systems). This fix, to mark the memory regin the GART PTEs reside on as uncacheable, also brings the code in line with the AGP specification.

[PATCH] x86_64: make GART PTEs uncacheable

2007-04-23 Thread Joachim Deguara
This patches fixes the silent data corruption problems being seen using the GART iommu where 4kB of data where incorrect (seen mostly on Nvidia CK804 systems). This fix, to mark the memory regin the GART PTEs reside on as uncacheable, also brings the code in line with the AGP specification.

Re: [PATCH] x86_64: make GART PTEs uncacheable

2007-04-23 Thread Andi Kleen
On Monday 23 April 2007 11:14:10 Joachim Deguara wrote: This patches fixes the silent data corruption problems being seen using the GART iommu where 4kB of data where incorrect (seen mostly on Nvidia CK804 systems). Performance numbers? How much slower does this make this? Is it still faster

Re: [PATCH] x86_64: make GART PTEs uncacheable

2007-04-23 Thread Joachim Deguara
On Monday 23 April 2007 11:32, Andi Kleen wrote: On Monday 23 April 2007 11:14:10 Joachim Deguara wrote: This patches fixes the silent data corruption problems being seen using the GART iommu where 4kB of data where incorrect (seen mostly on Nvidia CK804 systems). Performance numbers? How

Re: [PATCH] x86_64: make GART PTEs uncacheable

2007-04-23 Thread Andi Kleen
On Monday 23 April 2007 11:45:11 Joachim Deguara wrote: I can work on that as a side note, but while the GART IOMMU is still in the kernel then we need this fix. If it's too slow we can just use swiotlb instead. Probably while enlarging it. -Andi - To unsubscribe from this list: send the