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

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Message-ID: <20100609174744.GG6162@thunk.org>
Date:	Wed, 9 Jun 2010 13:47:44 -0400
From:	tytso@....edu
To:	Linus Torvalds <torvalds@...ux-foundation.org>
Cc:	Ingo Molnar <mingo@...e.hu>, Salman <sqazi@...gle.com>,
	Andrew Morton <akpm@...ux-foundation.org>,
	peterz@...radead.org, akpm@...x-foundation.org,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	tytso@...gle.com, Thomas Gleixner <tglx@...utronix.de>
Subject: Re: [PATCH] Fix a race in pid generation that causes pids to be
 reused immediately.

On Wed, Jun 09, 2010 at 10:43:33AM -0700, Linus Torvalds wrote:
> 
> We need that bitmap to handle the overflow max_pid case. We are _not_ 
> returning just increasing pid numbers.

Doh!  I knew I was forgetting something obvious.  I was hoping we
could get rid of the bitmap entirely, but I guess not....

(Unless users would stand for 64-bit pid numbers... no?  Dang. :-)

      	      	     	    	      - Ted
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