To: Russell Miller <rmiller@duskglow.com>
Cc: Doug McNaught <doug@mcnaught.org>, Jim Nelson <james4765@verizon.net>,
       DervishD <lkml@dervishd.net>, Gene Heskett <gene.heskett@verizon.net>,
       linux-kernel@vger.kernel.org,
       =?iso-8859-1?Q?M=E5ns_Rullg=E5rd?= <mru@inprovide.com>
Subject: Re: is killing zombies possible w/o a reboot?
References: <200411030751.39578.gene.heskett@verizon.net>
	<200411031644.58979.rmiller@duskglow.com>
	<87k6t24jsr.fsf@asmodeus.mcnaught.org>
	<200411031733.30469.rmiller@duskglow.com>
From: Mathieu Segaud <matt@minas-morgul.org>
Date: Thu, 04 Nov 2004 00:47:18 +0100
In-Reply-To: <200411031733.30469.rmiller@duskglow.com> (Russell Miller's
	message of "Wed, 3 Nov 2004 18:33:30 -0500")
Message-ID: <877jp2sdfd.fsf@barad-dur.crans.org>
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Russell Miller <rmiller@duskglow.com> disait derni?rement que :

> I am going to continue pursuing this at the risk of making a bigger fool of 
> myself than I already am, but I want to make sure that I understand the 
> issues - and I did read the message you are referring to.
>
> I think what you are saying is that there is kind of a race condition here.  
> When something is on the wait queue, it has to be followed through to 
> completion.  An interrupt could be received at any time, and if it's taken 
> off of the wait queue prematurely, it'll crash the kernel, because the 
> interrupt has no way of telling that.
>
> That's fine as it goes, I understand that.  But I submit that this is a 
> horrible design.  I've been bitten by this more than once - usually regarding 
> broken NFS connections.

this is because nfs related syscalls are not interruptible by default.
you can make them interruptible by mounting your nfs's with the 'intr' option.

-- 
I love people saying 'we' even though they never contributed a single
line of code to the project!

	- Jens Axboe turning a troll down on linux-kernel

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