Re: [PATCH 3/4] Bluetooth: Limit depth of the HCI TX queue with ERTM mode

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Hi Mat,

* Mat Martineau <mathewm@xxxxxxxxxxxxxx> [2011-06-03 16:21:09 -0700]:

> In order to provide timely responses to REJ, SREJ, and poll input from
> the remote device, it helps to reduce the number of ERTM data frames
> in the HCI TX queue at one time. If a full TX window of data is in the
> HCI TX queue, any responses to REJ, SREJ, or polls must wait in line
> behind all previously queued data. This latency leads to disconnects,
> and will be more severe with extended window sizes.


I prefer if we go with a hci_send_acl_prio() implementation. It will have much
less overhead using a workqueue. As it will be filled only by S-frames with a
few bytes each I don't think we will have problems. So lets go with this
approach and see what we can get.

	Gustavo
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