linux-kernel - Re: the Linux kernel, testsuites, and maybe *you*

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Message-ID: <1defaf580709021120y20d1c4dfo948ebb1b5206e980@mail.gmail.com>
Date:	Sun, 2 Sep 2007 20:20:22 +0200
From:	"Håvard Skinnemoen" <hskinnemoen@...il.com>
To:	"Andi Kleen" <andi@...stfloor.org>
Cc:	"Mike Frysinger" <vapier.adi@...il.com>,
	"Linux Kernel" <linux-kernel@...r.kernel.org>
Subject: Re: the Linux kernel, testsuites, and maybe *you*

On 9/2/07, Andi Kleen <andi@...stfloor.org> wrote:
> The other issue to test some of them properly you need unmapped pages
> etc. That gets much easier to do in user space. There are some other
> issues.

vmalloc, vmap, etc. always put a guard page after the allocation. So
if you test string operations on vmalloc()'ed memory, you have
unmapped pages in both ends.

I like the idea of a test suite for kernel internals, but I also think
it would be best to run it in kernel mode since things like atomics,
etc. may work differently in user space on some architectures.

Haavard
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