Re: [PATCH] Add a test program for variable page sizes in mmap/shmget v2

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On Thu,  8 Nov 2012 13:01:26 -0800
Andi Kleen <andi@xxxxxxxxxxxxxx> wrote:

> From: Andi Kleen <ak@xxxxxxxxxxxxxxx>
> 
> Not hooked up to the harness so far, because it usually needs
> special boot options for 1GB pages.

This isn't the case from my reading: we *can* hook it up now?

> index b336b24..7300d07 100644
> --- a/tools/testing/selftests/vm/Makefile
> +++ b/tools/testing/selftests/vm/Makefile
> @@ -1,9 +1,9 @@
>  # Makefile for vm selftests
>  
>  CC = $(CROSS_COMPILE)gcc
> -CFLAGS = -Wall -Wextra
> +CFLAGS = -Wall

Why this?  It doesn't change anything with my gcc so I think
I'll revert that.

>
> ...
>

Also...

I just tried a `make run_vmtests' and it fell on its face. 
There's a little comment in there saying "please run as root", but we
don't *want* that.  The selftests should be runnable as non-root and
should, where unavoidable, emit a warning and proceed if elevated
permissions are required.

I tried running it as root and my workstation hung, requiring a reboot.
Won't be doing that again.

Dave, could you please have a dig at this sometime?

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