Messages in this thread | | | Date | Thu, 21 Mar 2013 11:57:32 -0600 | From | Jason Gunthorpe <> | Subject | Re: [PATCH] rdma: don't make pages writeable if not requiested |
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On Thu, Mar 21, 2013 at 07:42:37PM +0200, Michael S. Tsirkin wrote:
> It doesn't actually, and our app would sometimes write to these pages. > It simply does not care which version does the remote get in this case > since we track writes and resend later.
Heh, somehow I thought you might say that :)
A new flag seems like the only way then - maybe: IBV_ACCESS_NON_COHERENT - The adaptor and the CPU do not share a coherent view of registered memory. Memory writes from the CPU after ibv_reg_mr completes may not be reflected in the memory viewed by the adaptor.
Can only be combined with read only access permissions.
Jason
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