From: Christoph Hellwig <hch-wEGCiKHe2LqWVfeAwA7xHQ@public.gmane.org>
To: Leon Romanovsky <leon-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org>
Cc: Doug Ledford <dledford-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>,
linux-rdma-u79uwXL29TY76Z2rM5mHXA@public.gmane.org
Subject: Re: [PATCH rdma-next 0/2] Introduce an IB device's scatter end padding capability
Date: Wed, 18 Oct 2017 00:12:59 -0700 [thread overview]
Message-ID: <20171018071258.GA32583@infradead.org> (raw)
In-Reply-To: <20171017151857.11934-1-leon-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org>
On Tue, Oct 17, 2017 at 06:18:55PM +0300, Leon Romanovsky wrote:
> There are PCIe root complex that are able to optimize their
> performance when incoming data is multiple full cache lines.
>
> Expose the device capability to pad the ending of incoming packets
> (scatter) to full cache line such that the last upstream write
> generated by the incoming packet will be a full cache line.
Any why would this be a user controller option? Isn't this something
that the kernel should set up automatically instead of needing arcane
tribal knowledge in the ULPs and applications?
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next prev parent reply other threads:[~2017-10-18 7:12 UTC|newest]
Thread overview: 14+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-10-17 15:18 [PATCH rdma-next 0/2] Introduce an IB device's scatter end padding capability Leon Romanovsky
[not found] ` <20171017151857.11934-1-leon-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org>
2017-10-17 15:18 ` [PATCH rdma-next 1/2] IB/core: Add scatter end padding flags for WQ and QP Leon Romanovsky
[not found] ` <20171017151857.11934-2-leon-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org>
2017-10-25 17:58 ` Doug Ledford
[not found] ` <1508954339.3325.45.camel-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>
2017-10-25 19:03 ` Leon Romanovsky
[not found] ` <20171025190352.GW16127-U/DQcQFIOTAAJjI8aNfphQ@public.gmane.org>
2017-10-25 19:53 ` Jason Gunthorpe
[not found] ` <20171025195311.GD998-ePGOBjL8dl3ta4EC/59zMFaTQe2KTcn/@public.gmane.org>
2017-10-25 19:57 ` Leon Romanovsky
2017-10-17 15:18 ` [PATCH rdma-next 2/2] IB/mlx5: Add scatter end padding support Leon Romanovsky
[not found] ` <20171017151857.11934-3-leon-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org>
2017-10-18 10:37 ` Amrani, Ram
[not found] ` <BN3PR07MB25787107C19B694BB0BA39B4F84D0-EldUQEzkDQfpW3VS/XPqkOFPX92sqiQdvxpqHgZTriW3zl9H0oFU5g@public.gmane.org>
2017-10-18 13:53 ` Noa Osherovich
[not found] ` <7d53f1e2-239b-0415-5b28-875f1710c11a-VPRAkNaXOzVWk0Htik3J/w@public.gmane.org>
2017-10-19 7:56 ` Amrani, Ram
[not found] ` <BN3PR07MB2578139CB1C38C5228B395F6F8420-EldUQEzkDQfpW3VS/XPqkOFPX92sqiQdvxpqHgZTriW3zl9H0oFU5g@public.gmane.org>
2017-10-19 10:15 ` Noa Osherovich
[not found] ` <70f59192-fcd8-95b9-72f0-edda9ac6c287-VPRAkNaXOzVWk0Htik3J/w@public.gmane.org>
2017-10-19 11:29 ` Amrani, Ram
2017-10-18 7:12 ` Christoph Hellwig [this message]
[not found] ` <20171018071258.GA32583-wEGCiKHe2LqWVfeAwA7xHQ@public.gmane.org>
2017-10-18 13:51 ` [PATCH rdma-next 0/2] Introduce an IB device's scatter end padding capability Noa Osherovich
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