linux-kernel - Re: [PATCH] ipc/sem.c: fix update sem_otime when calling sem

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Date:	Mon, 23 Sep 2013 03:08:36 +0200
From:	Mike Galbraith <bitbucket@...ine.de>
To:	Manfred Spraul <manfred@...orfullife.com>
Cc:	Jia He <jiakernel@...il.com>, linux-kernel@...r.kernel.org,
	Davidlohr Bueso <davidlohr.bueso@...com>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Rik van Riel <riel@...hat.com>,
	Al Viro <viro@...iv.linux.org.uk>
Subject: Re: [PATCH] ipc/sem.c: fix update sem_otime when calling sem_op in
 semaphore initialization

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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