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Date: Wed, 6 Dec 2000 13:58:25 -0800
From: Alfred Perlstein <alfred@FreeBSD.org>
To: cvs-committers@FreeBSD.org, cvs-all@FreeBSD.org
Subject: Re: cvs commit: src/sys/vm phys_pager.c
Message-ID: <20001206135824.G8051@fw.wintelcom.net>
References: <200012062152.eB6LqNU01059@freefall.freebsd.org>
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In-Reply-To: <200012062152.eB6LqNU01059@freefall.freebsd.org>; from alfred@FreeBSD.org on Wed, Dec 06, 2000 at 01:52:23PM -0800
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* Alfred Perlstein <alfred@FreeBSD.org> [001206 13:52] wrote:
> alfred      2000/12/06 13:52:23 PST
> 
>   Modified files:
>     sys/vm               phys_pager.c 
>   Log:
>   Really fix phys_pager:
>   
>   Backout the previous delta (rev 1.4), it didn't make any difference.
>   
>   If the requested handle is NULL then don't add it to the list of
>   objects, to be found by handle.
>   
>   The problem is that when asking for a NULL handle you are implying
>   you want a new object.  Because objects with NULL handles were
>   being added to the list, any further requests for phys backed
>   objects with NULL handles would return a reference to the initial
>   NULL handle object after finding it on the list.
>   
>   Basically one couldn't have more than one phys backed object without
>   a handle in the entire system without this fix.  If you did more
>   than one shared memory allocation using the phys pager it would
>   give you your initial allocation again.
>   
>   Revision  Changes    Path
>   1.5       +37 -32    src/sys/vm/phys_pager.c
> 

Matt Dillon reviewed this.

-- 
-Alfred Perlstein - [bright@wintelcom.net|alfred@freebsd.org]
"I have the heart of a child; I keep it in a jar on my desk."


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