On Wed, Sep 29, 2021 at 11:25:58PM -0500, Bob Pearson wrote:
> Currently the rdma_rxe driver and its user space provider exchange
> addressing information for UD sends by having the provider compute an
> address vector (AV) and send it with each WQE. This is not the way
> that the RDMA verbs API was intended to operate.
>
> This series of patches modifies the way UD send WQEs work by exchanging
> an index identifying the AH replacing the 88 byte AV by a 4 byte AH
> index. In order to not break compatibility with the existing API the
> rdma_rxe driver will recognise when an older version of the provider
> is not sending an index (i.e. it is 0) and will use the AV instead.
>
> This series of patches is almost identical to an earlier version
> but rebased to 5.15.0-rc1+. It applies cleanly to
>
> 450f4f6aa1a369cc3ffadc1c7e27dfab3e90199f (for-next)
It looks OK, but please rebase/resend it across Rao's patch to here:
commit 0994a1bcd5f7c0bf7ca3b4938d4f0f6928ac7886
Author: Rao Shoaib <Rao.Shoaib@xxxxxxxxxx>
Date: Tue Sep 14 18:12:20 2021 -0700
RDMA/rxe: Bump up default maximum values used via uverbs
In our internal testing we have found that default maximum values are too
small. Ideally there should be no limits, but since maximum values are
reported via ibv_query_device, we have to return some value. So, the
default maximums have been changed to large values.
Link: https://lore.kernel.org/r/20210915011220.307585-1-Rao.Shoaib@xxxxxxxxxx
Signed-off-by: Rao Shoaib <Rao.Shoaib@xxxxxxxxxx>
Signed-off-by: Jason Gunthorpe <jgg@xxxxxxxxxx>
Jason
