Message-ID: <1379898516.5476.27.camel@marge.simpson.net>
Subject: Re: [PATCH] ipc/sem.c: fix update sem_otime when calling sem_op in
 semaphore initialization
From: Mike Galbraith <bitbucket@online.de>
To: Manfred Spraul <manfred@colorfullife.com>
Cc: Jia He <jiakernel@gmail.com>, linux-kernel@vger.kernel.org,
        Davidlohr Bueso <davidlohr.bueso@hp.com>,
        Andrew Morton <akpm@linux-foundation.org>,
        Rik van Riel <riel@redhat.com>, Al Viro <viro@zeniv.linux.org.uk>
Date: Mon, 23 Sep 2013 03:08:36 +0200
In-Reply-To: <523EC97D.8020707@colorfullife.com>
References: <1379815884-11035-1-git-send-email-jiakernel@gmail.com>
	 <1379837823.5499.34.camel@marge.simpson.net>
	 <1379838364.5499.39.camel@marge.simpson.net>
	 <523EC97D.8020707@colorfullife.com>
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On Sun, 2013-09-22 at 12:42 +0200, Manfred Spraul wrote:

> Mike: no, your patch makes it worse:
> - wait-for-zero semops still don't update sem_otime
> - sem_otime is initialized to sem_ctime. That's not mentioned in the 
> sysv standard.

So sem_otime = 0 is a specified semaphore state?  I thought the proggy
was busted for spinning on a (busted and) irrelevant stamp.

Man lernt nie aus.

-Mike

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