linux-kernel - Re: [PATCH] net: ethernet: wiznet: Remove create

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Message-ID: <20160601184654.GF14868@mtj.duckdns.org>
Date:	Wed, 1 Jun 2016 14:46:54 -0400
From:	Tejun Heo <tj@...nel.org>
To:	Bhaktipriya Shridhar <bhaktipriya96@...il.com>
Cc:	"David S. Miller" <davem@...emloft.net>,
	Akinobu Mita <akinobu.mita@...il.com>,
	Antonio Quartulli <a@...table.cc>,
	Felipe Balbi <felipe.balbi@...ux.intel.com>,
	Florian Westphal <fw@...len.de>, netdev@...r.kernel.org,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH] net: ethernet: wiznet: Remove create_workqueue

On Wed, Jun 01, 2016 at 11:29:15PM +0530, Bhaktipriya Shridhar wrote:
> alloc_workqueue replaces deprecated create_workqueue().
> 
> A dedicated workqueue has been used since the workitems are involved
> in normal device operation. Workitems &priv->rx_work and &priv->tx_work,
> map to w5100_rx_work and w5100_tx_work respectively and are involved in
> receiving and transmitting packets. Forward progress under
> memory pressure is a requirement here.
> 
> create_workqueue has been replaced with alloc_workqueue with max_active
> as 0 since there is no need for throttling the number of active work
> items.
> 
> Since the driver may be used in memory reclaim path,
> WQ_MEM_RECLAIM has been set to guarantee forward progress.
> 
> flush_workqueue is unnecessary since destroy_workqueue() itself calls
> drain_workqueue() which flushes repeatedly till the workqueue
> becomes empty. Hence the call to flush_workqueue() has been dropped.
> 
> Signed-off-by: Bhaktipriya Shridhar <bhaktipriya96@...il.com>

Acked-by: Tejun Heo <tj@...nel.org>

Thanks.

-- 
tejun