From: Peter Zijlstra <peterz@infradead.org>
To: "Chris Friesen" <cfriesen@nortel.com>
Cc: linux-kernel@vger.kernel.org
Subject: Re: question on kernel rwsem behaviour
Date: Fri, 21 Sep 2007 22:11:22 +0200 [thread overview]
Message-ID: <20070921221122.7776e0ec@lappy> (raw)
In-Reply-To: <46F3E584.4020301@nortel.com>
On Fri, 21 Sep 2007 09:38:44 -0600 "Chris Friesen"
<cfriesen@nortel.com> wrote:
>
> Hi all,
>
> I just had a quick question on read-write semaphore semantics. Suppose
> someone holds a sema for reading, then someone else tries to aquire it
> for writing, and blocks. Finally, a third code path tries to aquire it
> for reading.
>
> Does this third code path get the sema, or does it wait for the writer?
>
> Based on looking at the implementation it seems like it waits, but I'd
> like to confirm that.
Yes, its fair in that sense.
prev parent reply other threads:[~2007-09-21 20:13 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2007-09-21 15:38 question on kernel rwsem behaviour Chris Friesen
2007-09-21 20:11 ` Peter Zijlstra [this message]
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