netdev - Re: [PATCH] usbnet: ratelimit kevent may have been dropped warnings

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Message-ID: <2192335.eVEjctQSPm@linux-lqwf.site>
Date:	Mon, 12 Nov 2012 08:16:29 +0100
From:	Oliver Neukum <oneukum@...e.de>
To:	Steve Glendinning <steve.glendinning@...well.net>
Cc:	netdev@...r.kernel.org
Subject: Re: [PATCH] usbnet: ratelimit kevent may have been dropped warnings

On Thursday 08 November 2012 16:26:21 Steve Glendinning wrote:

> There's an underlying problem in usbnet's kevent deferral

This is imported from schedule_work().

> mechanism which needs fixing, specifically that events *can*
> get dropped and not handled.  This patch doesn't address this,
> but just mitigates fallout caused by the current implemention.

All is not lost, as the flag is still set. How about starting a timer
in the failure case? It feels kind of dirty, but a solution with locks would
leave open a window to a race in any case.

	Regards
		Oliver

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