From: Bob Miller <rem@osdl.org>
To: Ron Niles <Ron.Niles@falconstor.com>
Cc: David Woodhouse <dwmw2@infradead.org>, linux-kernel@vger.kernel.org
Subject: Re: Oops from local semaphore race condition
Date: Tue, 21 May 2002 14:16:14 -0700 [thread overview]
Message-ID: <20020521141614.A13087@doc.pdx.osdl.net> (raw)
In-Reply-To: <E79B8AB303080F4096068F046CD1D89B934D5E@exchange1.FalconStor.Net>
On Tue, May 21, 2002 at 03:41:19PM -0400, Ron Niles wrote:
>
>
> Ron.Niles@falconstor.com said:
> >> Then I realized it can possibly go corrupt, due to a race condition
> >> which lets down() continue before up() is complete:
>
> From: David Woodhouse [mailto:dwmw2@infradead.org]
>
> >This is what completions were added for.
>
> Thanks, struct completion is the best way; it's gonna be tough to maintain
> backward compatibility though.
>
> One comment; it looks like the implementation in sched.c should more
> properly be using wq_write_lock_irqsave on the lock.
>
I sent patches to Linus to fix this back in February. Dave Jones picked
them up and they are still in his tree. I don't know when/if he is going
to forward them onto Linus for inclusion into his tree.
--
Bob Miller Email: rem@osdl.org
Open Source Development Lab Phone: 503.626.2455 Ext. 17
next prev parent reply other threads:[~2002-05-21 21:16 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2002-05-21 19:41 Oops from local semaphore race condition Ron Niles
2002-05-21 21:16 ` Bob Miller [this message]
-- strict thread matches above, loose matches on Subject: below --
2002-05-21 0:11 Ron Niles
2002-05-21 12:26 ` David Woodhouse
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