From mboxrd@z Thu Jan  1 00:00:00 1970
From: erik quanstrom <quanstro@quanstro.net>
Date: Thu, 23 Aug 2012 12:24:59 -0400
To: cinap_lenrek@gmx.de, 9fans@9fans.net
Message-ID: <d1c7d7362524b9375ba8e19c51dfd265@kw.quanstro.net>
In-Reply-To: <d67c46cd156233f61e9381a31c62269d@rei2.9hal>
References: <d67c46cd156233f61e9381a31c62269d@rei2.9hal>
MIME-Version: 1.0
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Subject: Re: [9fans] devmnt crash, fix.
Topicbox-Message-UUID: af0723aa-ead7-11e9-9d60-3106f5b1d025

> 	sleep(&up->waitr, haswaitq, up);
>
> 	lock(&up->exl);
> 	wq = up->waitq;
> 	up->waitq = wq->next;	<-- wq == nil, boom! its gone!
> 	up->nwait--;
> 	unlock(&up->exl);
>
>
> if sleep returns or is spuriously woken up even tho up->waitq == nil.

ah, right.  looks like a bug.

- erik