linux-kernel - Re: [linux-pm] [PATCH 0/8] Suspend block api (version 8)

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Message-ID: <20100527193243.GC25663@gibbs.hungrycats.org>
Date:	Thu, 27 May 2010 15:32:43 -0400
From:	Zygo Blaxell <vger-linux-omap-esightcorp@...ltoo.hungrycats.org>
To:	Matthew Garrett <mjg59@...f.ucam.org>
Cc:	Alan Cox <alan@...rguk.ukuu.org.uk>,
	Arve Hjønnevåg <arve@...roid.com>,
	Florian Mickler <florian@...kler.org>,
	Vitaly Wool <vitalywool@...il.com>,
	Peter Zijlstra <peterz@...radead.org>,
	LKML <linux-kernel@...r.kernel.org>,
	Paul@...p1.linux-foundation.org, felipe.balbi@...ia.com,
	Linux OMAP Mailing List <linux-omap@...r.kernel.org>,
	Linux PM <linux-pm@...ts.linux-foundation.org>
Subject: Re: [linux-pm] [PATCH 0/8] Suspend block api (version 8)

On Thu, May 27, 2010 at 07:56:58PM +0100, Matthew Garrett wrote:
> Even if it's using poll, it could block purely on the display if X turns 
> the screen off between poll() waking and the write being made.

That's what fcntl(fd, F_SETFL, O_NONBLOCK) is for.

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