From: Roland Dreier <rdreier@cisco.com>
To: David Miller <davem@davemloft.net>
Cc: ak@suse.de, ashok.raj@intel.com, linux-kernel@vger.kernel.org,
akpm@osdl.org, gregkh@suse.de, muli@il.ibm.com,
asit.k.mallick@intel.com, suresh.b.siddha@intel.com,
anil.s.keshavamurthy@intel.com, arjan@linux.intel.com,
shaohua.li@intel.com
Subject: Re: [Intel IOMMU][patch 8/8] Preserve some Virtual Address when devices cannot address entire range.
Date: Tue, 24 Apr 2007 14:32:42 -0700 [thread overview]
Message-ID: <adaabwx1mrp.fsf@cisco.com> (raw)
In-Reply-To: <20070424.142351.62664098.davem@davemloft.net> (David Miller's message of "Tue, 24 Apr 2007 14:23:51 -0700 (PDT)")
> My suggestion would be to allocate top-down in the 32-bit IOMMU space.
I think that's good for normal things, but it's not unreasonable to
want to map > 4 GB of memory at once for an Infiniband device.
So maybe we would want some heuristics about the size of the mapping
being requested or the amount of 32-bit space left to decide whether a
mapping should be below 4 GB.
- R.
next prev parent reply other threads:[~2007-04-24 21:32 UTC|newest]
Thread overview: 35+ messages / expand[flat|nested] mbox.gz Atom feed top
2007-04-24 6:02 [Intel IOMMU][patch 0/8] Intel IOMMU Support Ashok Raj
2007-04-24 6:03 ` [Intel IOMMU][patch 1/8] ACPI support for Intel Virtualization Technology for Directed I/O Ashok Raj
2007-04-24 18:50 ` Andi Kleen
2007-04-24 20:17 ` Ashok Raj
2007-04-24 6:03 ` [Intel IOMMU][patch 2/8] Some generic search functions required to lookup device relationships Ashok Raj
2007-04-24 6:03 ` [Intel IOMMU][patch 3/8] Generic hardware support for Intel IOMMU Ashok Raj
2007-04-24 19:27 ` Andi Kleen
2007-04-24 20:59 ` Ashok Raj
2007-04-25 1:17 ` Shaohua Li
2007-04-25 6:53 ` Andi Kleen
2007-04-24 6:03 ` [Intel IOMMU][patch 4/8] Supporting Zero Length Reads in " Ashok Raj
2007-04-24 19:28 ` Andi Kleen
2007-04-24 20:42 ` Ashok Raj
2007-04-24 21:00 ` David Miller
2007-04-24 6:03 ` [Intel IOMMU][patch 5/8] Graphics driver workarounds to provide unity map Ashok Raj
2007-04-24 6:03 ` [Intel IOMMU][patch 6/8] Doc updates for Intel Virtualization Technology for Directed I/O Ashok Raj
2007-04-24 6:03 ` [Intel IOMMU][patch 7/8] Support for legacy ISA devices Ashok Raj
2007-04-24 19:31 ` Andi Kleen
2007-04-24 20:33 ` Arjan van de Ven
2007-04-24 20:39 ` Ashok Raj
2007-04-24 6:03 ` [Intel IOMMU][patch 8/8] Preserve some Virtual Address when devices cannot address entire range Ashok Raj
2007-04-24 19:33 ` Andi Kleen
2007-04-24 20:33 ` Ashok Raj
2007-04-24 21:12 ` Andi Kleen
2007-04-24 21:23 ` David Miller
2007-04-24 21:32 ` Roland Dreier [this message]
2007-04-24 21:47 ` David Miller
2007-04-24 21:38 ` Ashok Raj
2007-04-24 21:50 ` David Miller
2007-04-24 22:03 ` Andi Kleen
2007-04-24 22:26 ` Ashok Raj
2007-04-25 1:12 ` H. Peter Anvin
2007-04-25 6:55 ` Andi Kleen
2007-04-24 23:22 ` Alan Cox
-- strict thread matches above, loose matches on Subject: below --
2007-04-23 16:38 [Intel IOMMU][patch 0/8] Intel IOMMU Support Ashok Raj
2007-04-23 16:38 ` [Intel IOMMU][patch 8/8] Preserve some Virtual Address when devices cannot address entire range Ashok Raj
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