linux-kernel - Re: [PATCH] Fix a race in pid generation that causes pids to be reused immediately.

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Message-ID: <20100615125650.GL6666@thunk.org>
Date:	Tue, 15 Jun 2010 08:56:50 -0400
From:	tytso@....edu
To:	Andrew Morton <akpm@...ux-foundation.org>
Cc:	Salman <sqazi@...gle.com>, mingo@...e.hu,
	linux-kernel@...r.kernel.org, peterz@...radead.org,
	tytso@...gle.com, torvalds@...ux-foundation.org, walken@...gle.com,
	Chen Liqin <liqin.chen@...plusct.com>,
	Lennox Wu <lennox.wu@...il.com>
Subject: Re: [PATCH] Fix a race in pid generation that causes pids to be
 reused immediately.

On Mon, Jun 14, 2010 at 06:55:56PM -0700, Andrew Morton wrote:
> 
> I think you're probably right, as long as one sticks with 4-byte
> scalars.  The cmpxchg-is-now-generic change snuck in under the radar
> (mine, at least).

Hmmm, what about unsigned longs?  (Which might be 8 bytes on some
architectures....)

					- Ted
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