Re: [PATCH v9 0/6] MAP_DIRECT for DAX userspace flush

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On Mon, Oct 16, 2017 at 03:02:52PM +0300, Sagi Grimberg wrote:
> But why should the kernel ever need to mangle the CQ? if a lease break
> would deregister the MR the device is expected to generate remote
> protection errors on its own.

The point is to avoid protection errors - hittles change over when the
DAX mapping changes like ODP does.

Theonly way to get there is to notify the app before the mappings
change.. Dan suggested having ibv_pollcq return this indication..

Jason

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