Re: [Intel IOMMU][patch 8/8] Preserve some Virtual Address when devices cannot address entire range.

On Wednesday 25 April 2007 03:12:51 H. Peter Anvin wrote:

> You can probably find almost any possible bitmask if you look long 
> enough.  Hardware vendors are notorious for this kind of "optimizations".

The nice thing is if this was solved in the IOMMU code then we could drop
(or not initialize) GFP_DMA on systems with that hardware. I guess GFP_DMA32 
would still need to stay for the graphics devices though.

Not sure how much difference it would make though, but at least Christoph Lameter
seems to think it would.

-Andi
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to [email protected]
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/

---

• References:
  • Re: [Intel IOMMU][patch 8/8] Preserve some Virtual Address when devices cannot address entire range.
    • From: Andi Kleen <[email protected]>
  • Re: [Intel IOMMU][patch 8/8] Preserve some Virtual Address when devices cannot address entire range.
    • From: Andi Kleen <[email protected]>
  • Re: [Intel IOMMU][patch 8/8] Preserve some Virtual Address when devices cannot address entire range.
    • From: "H. Peter Anvin" <[email protected]>

• Prev by Date: Re: [Intel IOMMU][patch 3/8] Generic hardware support for Intel IOMMU.
• Next by Date: RE: NonExecutable Bit in 32Bit
• Previous by thread: Re: [Intel IOMMU][patch 8/8] Preserve some Virtual Address when devices cannot address entire range.
• Next by thread: Re: [Intel IOMMU][patch 8/8] Preserve some Virtual Address when devices cannot address entire range.
• Index(es):
  • Date
  • Thread

[Index of Archives]     [Kernel Newbies]     [Netfilter]     [Bugtraq]     [Photo]     [Stuff]     [Gimp]     [Yosemite News]     [MIPS Linux]     [ARM Linux]     [Linux Security]     [Linux RAID]     [Video 4 Linux]     [Linux for the blind]     [Linux Resources]