linux-kernel - Re: [PATCH net-next v4 5/7] eventpoll: Control irq suspension for prefer_busy

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Message-Id: <20241102233925.2948-1-hdanton@sina.com>
Date: Sun,  3 Nov 2024 07:39:25 +0800
From: Hillf Danton <hdanton@...a.com>
To: Joe Damato <jdamato@...tly.com>
Cc: netdev@...r.kernel.org,
	edumazet@...gle.com,
	willy@...radead.org,
	Alexander Viro <viro@...iv.linux.org.uk>,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH net-next v4 5/7] eventpoll: Control irq suspension for prefer_busy_poll

On Sat,  2 Nov 2024 00:52:01 +0000 Martin Karsten <mkarsten@...terloo.ca>
> 
> @@ -2005,8 +2032,10 @@ static int ep_poll(struct eventpoll *ep, struct epoll_event __user *events,
>  			 * trying again in search of more luck.
>  			 */
>  			res = ep_send_events(ep, events, maxevents);
> -			if (res)
> +			if (res) {
> +				ep_suspend_napi_irqs(ep);

Leave napi irq intact in case of -EINTR.

>  				return res;
> +			}
>  		}
>  
>  		if (timed_out)
> -- 
> 2.25.1