linux-kernel - Re: [RFC 1/4] kevent: core files.

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Message-Id: <20060801.005809.102616533.davem@davemloft.net>
Date:	Tue, 01 Aug 2006 00:58:09 -0700 (PDT)
From:	David Miller <davem@...emloft.net>
To:	drepper@...hat.com
Cc:	herbert@...dor.apana.org.au, johnpol@....mipt.ru,
	zach.brown@...cle.com, linux-kernel@...r.kernel.org,
	netdev@...r.kernel.org
Subject: Re: [RFC 1/4] kevent: core files.

From: Ulrich Drepper <drepper@...hat.com>
Date: Tue, 01 Aug 2006 00:53:10 -0700

> This is the case to keep in mind here.  I thought Zach and the other
> involved in the discussions in Ottawa said this has been shown to be a
> problem and that a ring buffer implementation with something other than
> simple front and back pointers is preferable.

This is part of why I suggested VJ style channel data
structure.  At worst, the cachelines for the entries get
into shared modified state when the remove userland cpu
reads the slot.
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