Re: [ofa-general] [PATCH][RFC]: pte notifiers -- support for external page tables

Andrew Hastings
2007-09-10T18:17:46Z

Avi Kivity wrote:
> Gleb Natapov wrote:
>> On Wed, Sep 05, 2007 at 07:38:48PM +0300, Avi Kivity wrote:
>>
>>> This sample patch adds a new mechanism, pte notifiers, that allows
>>> drivers
>>> to register an interest in a changes to ptes. Whenever Linux changes a
>>> pte, it will call a notifier to allow the driver to adjust the external
>>> page table and flush its tlb.
>>>
>> How is this different from http://lwn.net/Articles/133627/? AFAIR the
>> patch was rejected because there was only one user for it and it was
>> decided that it would be better to maintain it out of tree for a while.
>>
>
> Your patch is more complete.
>
> There are now at least three users: you, kvm, and newer Infiniband
> HCAs. Care to resurrect the patch?

We (Cray) also use the ioproc patch. AFAIK the current maintainer is
Dan Blueman at Quadrics.

-Andrew Hastings
Cray Inc.