From: Doug Ledford <dledford@redhat.com>
To: Chuck Lever <chuck.lever@oracle.com>, jgg@ziepe.ca
Cc: linux-rdma@vger.kernel.org, linux-cifs@vger.kernel.org,
linux-nfs@vger.kernel.org, v9fs-developer@lists.sourceforge.net
Subject: Re: [PATCH v3] rdma: Enable ib_alloc_cq to spread work over a device's comp_vectors
Date: Mon, 05 Aug 2019 12:02:36 -0400 [thread overview]
Message-ID: <1d2aadf8054b3ba2c50464e17fc477eb92bcf1b1.camel@redhat.com> (raw)
In-Reply-To: <20190729171923.13428.52555.stgit@manet.1015granger.net>
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On Mon, 2019-07-29 at 13:22 -0400, Chuck Lever wrote:
> Send and Receive completion is handled on a single CPU selected at
> the time each Completion Queue is allocated. Typically this is when
> an initiator instantiates an RDMA transport, or when a target
> accepts an RDMA connection.
>
> Some ULPs cannot open a connection per CPU to spread completion
> workload across available CPUs and MSI vectors. For such ULPs,
> provide an API that allows the RDMA core to select a completion
> vector based on the device's complement of available comp_vecs.
>
> ULPs that invoke ib_alloc_cq() with only comp_vector 0 are converted
> to use the new API so that their completion workloads interfere less
> with each other.
>
> Suggested-by: Håkon Bugge <haakon.bugge@oracle.com>
> Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
> Reviewed-by: Leon Romanovsky <leonro@mellanox.com>
> Cc: <linux-cifs@vger.kernel.org>
> Cc: <v9fs-developer@lists.sourceforge.net>
This looks reasonable to me Chuck, and we have plenty of time to test it
in for-next before the next merge window, so applied to for-next, thanks
:-)
--
Doug Ledford <dledford@redhat.com>
GPG KeyID: B826A3330E572FDD
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next prev parent reply other threads:[~2019-08-05 16:02 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-07-29 17:22 [PATCH v3] rdma: Enable ib_alloc_cq to spread work over a device's comp_vectors Chuck Lever
2019-08-05 16:02 ` Doug Ledford [this message]
2019-08-05 16:09 ` Bart Van Assche
2019-08-05 17:15 ` Chuck Lever
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