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

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Message-ID: <1379844021.5598.8.camel@marge.simpson.net>
Date:	Sun, 22 Sep 2013 12:00:21 +0200
From:	Mike Galbraith <bitbucket@...ine.de>
To:	Jia He <jiakernel@...il.com>
Cc:	linux-kernel@...r.kernel.org,
	Davidlohr Bueso <davidlohr.bueso@...com>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Rik van Riel <riel@...hat.com>,
	Manfred Spraul <manfred@...orfullife.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 17:34 +0800, Jia He wrote: 
> Thanks for the comments, but pls add my email as "from jiakernel@...il.com"
> if you have a better implementation.U know, it is my first kernel patch, maybe
> will give me a brilliant memory in the future :)

You can have the blame if you like :)

> Anyway, your implementation looks not correct to me. Because from "man semop"
> sem_otime will record the last sem operation time of semop. If you change the
> otime in semget(), it changes the meanings in stardard, doesn't it?

A Linux kernel doing a semop in 1970 would be a kinda neat trick :)

-Mike

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