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Date: Mon, 17 May 2004 14:31:54 -0700 (PDT)
From: Julian Elischer <julian@elischer.org>
To: Peter Wemm <peter@FreeBSD.org>
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Subject: Re: cvs commit: src/sys/kern kern_linker.c
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which brings up the question of TLS in the kernel :-)


On Mon, 17 May 2004, Peter Wemm wrote:

> peter       2004/05/17 14:24:40 PDT
> 
>   FreeBSD src repository
> 
>   Modified files:
>     sys/kern             kern_linker.c 
>   Log:
>   Since we go to the trouble of compiling the kobj ops table for each class,
>   and cannot handle it going away, add an explicit reference to the kobj
>   class inside each linker class.  Without this, a class with no modules
>   loaded will sit with an idle refcount of 0.  Loading and unloading
>   a module with it causes a 0->1->0 transition which frees the ops table
>   and causes subsequent loads using that class to explode.  Normally, the
>   "kernel" module will remain forever loaded and prevent this happening, but
>   if you have more than one linker class active, only one owns the "kernel".
>   
>   This finishes making modules work for kldload(8) on amd64.
>   
>   Revision  Changes    Path
>   1.111     +1 -0      src/sys/kern/kern_linker.c
>