netdev - Re: [PATCH 05/10] RDMA/cxgb4: Add DB Overflow Avoidance.

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Date:	Sun, 23 Oct 2011 10:33:49 -0500
From:	Steve Wise <swise@...ngridcomputing.com>
To:	Vipul Pandya <vipul@...lsio.com>
CC:	linux-rdma@...r.kernel.org, netdev@...r.kernel.org,
	roland@...estorage.com, davem@...emloft.net, divy@...lsio.com,
	dm@...lsio.com, kumaras@...lsio.com
Subject: Re: [PATCH 05/10] RDMA/cxgb4: Add DB Overflow Avoidance.


On 10/19/2011 12:10 PM, Vipul Pandya wrote:
>          - get FULL/EMPTY/DROP events from LLD
>
>          - on FULL event, disable normal user mode DB rings.
>
>          - add modify_qp semantics to allow user processes to call into
>          the kernel to ring doobells without overflowing.
>
>          Add DB Full/Empty/Drop stats.
>
>          Mark queues when created indicating the doorbell state.
>
>          If we're in the middle of db overflow avoidance, then newly created
>          queues should start out in this mode.
>

Hey Vipul,

I just realized, we need to bump the ABI for iw_cxgb4 with this series 
so the user mode library can know if the driver supports the kernel mode 
db ringing. So bump C4IW_UVERBS_ABI_VERSION to 3.

Steve.

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