Re: [dpdk-stable] [PATCH v2] event/dsw: avoid credit leak on oversized enqueue bursts

[Jerin Jacob Kollanukkaran <jerinj@marvell.com>]

> -----Original Message-----
> From: Mattias Rönnblom <mattias.ronnblom@ericsson.com>
> Sent: Tuesday, January 14, 2020 11:34 PM
> To: Jerin Jacob Kollanukkaran <jerinj@marvell.com>
> Cc: dev@dpdk.org; Mattias Rönnblom <mattias.ronnblom@ericsson.com>;
> stable@dpdk.org
> Subject: [EXT] [PATCH v2] event/dsw: avoid credit leak on oversized enqueue
> bursts
> 
> If an application issues rte_event_enqueue_new_burst() or
> rte_event_enqueue_forward_burst() call with a burst of events longer than the
> configured max enqueue burst size, DSW allocates credits not only for events
> actually enqueued, but for the complete burst. If this process is repeated,
> enough credits will have leaked to cause the event device to backpressure (i.e.
> disallow) any new enqueue operations.
> 
> In addition, the port-level enqueue xstats will log the wrong number of events
> enqueued for oversized enqueues.
> 
> This patch makes DSW gracefully handle oversized enqueue bursts.
> 
> Fixes: 1c8e3caa3bfb ("event/dsw: add event scheduling and device start/stop")
> Cc: stable@dpdk.org
> 
> Signed-off-by: Mattias Rönnblom <mattias.ronnblom@ericsson.com>

Please add the change log when sending the incremental versions.

v2:

# Fix the following reported compilation error.
http://mails.dpdk.org/archives/dev/2020-January/155161.html

Applied to dpdk-next-eventdev/master. Thanks.