linux-kernel - Re: [PATCH UPDATED 14/16] blkcg: don't allow or retain configuration of missing devices

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Message-ID: <20120124194635.GD17291@redhat.com>
Date:	Tue, 24 Jan 2012 14:46:35 -0500
From:	Vivek Goyal <vgoyal@...hat.com>
To:	Tejun Heo <tejun@...gle.com>
Cc:	axboe@...nel.dk, ctalbott@...gle.com, rni@...gle.com,
	linux-kernel@...r.kernel.org, Kay Sievers <kay.sievers@...y.org>
Subject: Re: [PATCH UPDATED 14/16] blkcg: don't allow or retain configuration
 of missing devices

On Tue, Jan 24, 2012 at 11:30:58AM -0800, Tejun Heo wrote:

[..]
> +
> +	/*
> +	 * If queue was bypassing, we should retry.  Do so after a short
> +	 * msleep().  It isn't strictly necessary but queue can be
> +	 * bypassing for some time and it's always nice to avoid busy
> +	 * looping.
> +	 */
> +	if (ret == -EBUSY) {
> +		msleep(10);
> +		return restart_syscall();
> +	}
>  	return ret;

Thanks. This one looks better.

Vivek
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