Jack Steiner wrote:
On Wed, Sep 05, 2007 at 07:38:48PM +0300, Avi Kivity wrote:
Some hardware and software systems maintain page tables outside the normal
Linux page tables, which reference userspace memory. This includes
Infiniband, other RDMA-capable devices, and kvm (with a pending patch).
I like it.
We have 2 special devices with external TLBs that can
take advantage of this.
One suggestion - at least for what we need. Can the notifier be
registered against the mm_struct instead of (or in addition to) the
vma?
Yes. It's a lot simpler since this way we don't have to support vma
creation/splitting/merging/destruction. There's a tiny performance hit
for kvm, but it isn't worth the bother.
Will implement for v2 of this patch.
--
Any sufficiently difficult bug is indistinguishable from a feature.
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