[libfabric-users] Binding EP with memory region with flags?

[Sur, Sayantan]

Hi Jintack,

Thanks for pointing this out. The GASNet code was tested for libfabric 1.2, where the framework and providers weren’t doing some checks. It seems to me that there is a bug in that region of the code for GASNET_SEGMENT_FAST || GASNET_SEGMENT_LARGE. The newly attached memory does not specify the key – all segments get key 0!

I think we need to revisit that and fix the bug. In the meanwhile, ofi_ep_bind_valid() seems to be correct per the current definition of OFI … there shouldn’t be a need to bind a MR to an EP.

Thanks,
Sayantan.

From: Libfabric-users <libfabric-users-bounces at lists.openfabrics.org> on behalf of "Lim, Jintack" <jin-tack.lim at hpe.com>
Date: Wednesday, July 13, 2016 at 4:36 PM
To: "libfabric-users at lists.openfabrics.org" <libfabric-users at lists.openfabrics.org>
Subject: [libfabric-users] Binding EP with memory region with flags?

Hi,

I wonder how to bind EP with memory region with flags such as FI_REMOTE_READ or FI_REMOTE_WRITE?
I’m working on v1.3.0, and ofi_ep_bind_valid() in src/common.c returns error when binding MR with any flags.
Should we check flags for FI_CLASS_MR specifically in ofi_ep_bind_valid()?

Here’s an example of binding EP with MR.
https://bitbucket.org/berkeleylab/gasnet/src/6f98691fef36d76fd4d42dc7a20e37a77869b84e/ofi-conduit/gasnet_ofi.c?at=master&fileviewer=file-view-default#gasnet_ofi.c-486

Best,
Jintack
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