linux-kernel - Re: [PATCH] i386: convert mm_context

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Message-ID: <20070806152502.GA6988@elte.hu>
Date:	Mon, 6 Aug 2007 17:25:02 +0200
From:	Ingo Molnar <mingo@...e.hu>
To:	"Luiz Fernando N. Capitulino" <lcapitulino@...driva.com.br>
Cc:	Andrew Morton <akpm@...ux-foundation.org>,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH] i386: convert mm_context_t semaphore to a mutex


* Luiz Fernando N. Capitulino <lcapitulino@...driva.com.br> wrote:

> | hm, looks good to me but i'm wondering why this was a holdout for 
> | such a long time :-) Did you manage to test actual LDT functionality 
> | with this patch applied?
> 
>  No, I didn't. The only test I did was to run the kernel with this 
> patch applied.
> 
>  I'll manage to test it then. Do you have a test-case or has any 
> suggestion?

i think try any pthread program with:

   export LD_ASSUME_KERNEL=2.4.0

should trigger the LDT code. Try stracing the code and modify_ldt calls 
should show up.

>  Oh, btw, I forgot to 'quilt add arch/i386/mm/fault.c' [...]

heh. After a dozen of such incidents i scripted my editor command to 
automatically do the quilt add :)

	Ingo
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