netdev - Re: Page allocation failures in guest

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Message-ID: <4A825601.60000@redhat.com>
Date:	Wed, 12 Aug 2009 08:41:21 +0300
From:	Avi Kivity <avi@...hat.com>
To:	Rusty Russell <rusty@...tcorp.com.au>
CC:	Pierre Ossman <drzeus-list@...eus.cx>,
	Minchan Kim <minchan.kim@...il.com>, kvm@...r.kernel.org,
	LKML <linux-kernel@...r.kernel.org>, linux-mm@...ck.org,
	Wu Fengguang <fengguang.wu@...el.com>,
	KOSAKI Motohiro <kosaki.motohiro@...fujitsu.com>,
	Rik van Riel <riel@...hat.com>, netdev@...r.kernel.org
Subject: Re: Page allocation failures in guest

On 08/12/2009 08:31 AM, Rusty Russell wrote:
> +static void refill_work(struct work_struct *work)
> +{
> +	struct virtnet_info *vi;
> +	bool still_empty;
> +
> +	vi = container_of(work, struct virtnet_info, refill);
> +	napi_disable(&vi->napi);
> +	try_fill_recv(vi, GFP_KERNEL);
> +	still_empty = (vi->num == 0);
> +	napi_enable(&vi->napi);
> +
> +	/* In theory, this can happen: if we don't get any buffers in
> +	 * we will*never*  try to fill again.  Sleeping in keventd if
> +	 * bad, but that is worse. */
> +	if (still_empty) {
> +		msleep(100);
> +		schedule_work(&vi->refill);
> +	}
> +}
> +
>    

schedule_delayed_work()?

-- 
Do not meddle in the internals of kernels, for they are subtle and quick to panic.

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