"Couldn't allocate MR" errors on latest perftest about perftest

[larrystevenwise]

The bisect was bad. I ran it again, and this is the culprit:

1e72cff is the first bad commit
commit 1e72cff
Author: Zohar Ben Aharon [email protected]
Date: Sun Nov 19 17:28:59 2017 +0200

Remove contig support from regular verbs

Removed the 23 bit enable that refer to contig pages support.
it is now only supported by exp_verbs.

Signed-off-by: Zohar Ben Aharon <[email protected]>

:040000 040000 66c85b6d725b1afcdc7072d998b8f031cbfe3c03 ddefc6cd1436ccb1e454700fc56795f82e496959 M src

[zoharbenaharon]

Is the error occurs for RDMA_CM cases only?
What Os kernel are you running ?

[bryantan-vmware]

I'm hitting this issue as well, using vmw_pvrdma. Looks like the problem is that ctx->is_contig_supported defaults to SUCCESS, even without exp_verbs, and then ctx->buf[qp_index] is set to NULL, which causes ibv_create_mr to fail.

Happens without CM. I'm on a 4.11 kernel, but for vmw_pvrdma I think this would happen regardless of CM/without CM or on a different kernel/OS. I'm using rdma-core with a recent commit.

[larrystevenwise]

I'm using 4.14.25.

[zoharbenaharon]

Thanks again Larry

ive add fix to this Pull request [https://github.com//pull/29]
could find your user for Review , will appreciate your feedback

Thanks

[zoharbenaharon]

fix added

[joyceliuExaai]

Hi All,

I saw the similar issue as well in Kernel 4.18 & Linux 7.5.
I used yum groupinstall "InfinibandSupport" to install IB driver. any solution?

thanks,
Joyce

[larrystevenwise]

Try pulling/building/installing the latest perftest.