From: Charles Forsyth <charles.forsyth@gmail.com>
To: Fans of the OS Plan 9 from Bell Labs <9fans@9fans.net>
Subject: Re: [9fans] devmnt crash, fix.
Date: Thu, 23 Aug 2012 12:47:10 -0400 [thread overview]
Message-ID: <CAOw7k5ii5PoYZnEbDeUuhR9GsgEEGt7i+XTQm7FR9+r=ENg=xw@mail.gmail.com> (raw)
In-Reply-To: <d1c7d7362524b9375ba8e19c51dfd265@kw.quanstro.net>
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No. It's not true that all sleeps might return spuriously (it might have
been true in Unix, I can't remember).
It's not true in Plan 9.
On 23 August 2012 12:24, erik quanstrom <quanstro@quanstro.net> wrote:
> > 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
>
>
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next prev parent reply other threads:[~2012-08-23 16:47 UTC|newest]
Thread overview: 21+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-08-22 18:53 erik quanstrom
2012-08-22 19:09 ` cinap_lenrek
2012-08-22 19:12 ` cinap_lenrek
2012-08-22 19:53 ` cinap_lenrek
2012-08-22 22:26 ` erik quanstrom
2012-08-22 23:30 ` cinap_lenrek
2012-08-23 1:53 ` erik quanstrom
2012-08-23 9:47 ` cinap_lenrek
2012-08-23 13:27 ` erik quanstrom
2012-08-23 15:02 ` cinap_lenrek
2012-08-23 15:39 ` Bakul Shah
2012-08-23 15:48 ` erik quanstrom
2012-08-23 15:53 ` cinap_lenrek
2012-08-23 16:06 ` erik quanstrom
2012-08-23 16:18 ` cinap_lenrek
2012-08-23 16:24 ` erik quanstrom
2012-08-23 16:47 ` Charles Forsyth [this message]
2012-08-23 17:01 ` cinap_lenrek
2012-08-23 17:53 ` Bakul Shah
2012-08-23 18:03 ` erik quanstrom
[not found] ` <CAOw7k5ii5PoYZnEbDeUuhR9GsgEEGt7i+XTQm7FR9+r=ENg=xw@mail.gmail.c>
2012-08-23 17:09 ` erik quanstrom
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