linux-kernel - Re: Man page for revised timerfd API

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Message-ID: <20070927103531.184550@gmx.net>
Date:	Thu, 27 Sep 2007 12:35:31 +0200
From:	"Michael Kerrisk" <mtk-manpages@....net>
To:	Davide Libenzi <davidel@...ilserver.org>
Cc:	rdunlap@...otime.net, akpm@...ux-foundation.org, hch@....de,
	geoff@...are.org.uk, tglx@...utronix.de, david@...deman.nu,
	drepper@...hat.com, subrata@...ux.vnet.ibm.com, corbet@....net,
	linux-kernel@...r.kernel.org
Subject: Re: Man page for revised timerfd API

Davide,

A further question: what is the expected behavior in the
following scenario:

1. Create a timerfd and arm it.
2. Wait until M timer expirations have occurred
3. Modify the settings of the timer
4. Wait for N further timer expirations have occurred
5. read() from the timerfd

Does the buffer returned by the read() contain the value
N or (M+N)?  In other words, should modifying the timer
settings reset the expiration count to zero?

Cheers,

Michael
-- 
Michael Kerrisk
maintainer of Linux man pages Sections 2, 3, 4, 5, and 7 

Want to help with man page maintenance?  
Grab the latest tarball at
http://www.kernel.org/pub/linux/docs/manpages , 
read the HOWTOHELP file and grep the source 
files for 'FIXME'.

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