Re: [PATCH -mm 0/3] convert IOMMUs to use iova
- From: Muli Ben-Yehuda <muli@xxxxxxxxxx>
- Date: Fri, 2 Nov 2007 19:12:27 +0200
On Sat, Nov 03, 2007 at 02:05:39AM +0900, FUJITA Tomonori wrote:
This patchset convert the PPC64 IOMMU to use the iova code for free
area management.
The IOMMUs ignores low level drivers' restrictions, the maximum
segment size and segment boundary.
I fixed the former:
http://thread.gmane.org/gmane.linux.scsi/35602
The latter makes the free area management complicated. I'd like to
convert IOMMUs to use the iova code (that intel-iommu introduced)
for free area management and enable iova to handle segment boundary
restrictions, rather than fixing all the IOMMUs' free area
management,
In general it sounds like a great idea, but have you looked at what
impact this has on the performance of the IO path?
Cheers,
Muli
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