Re: [PATCH] scripts/runqemu-internal: Work around qemux86 PAT bugs in linux 4.4.1

[Bruce Ashfield <bruce.ashfield@windriver.com>]

On 2016-02-12 1:00 PM, Richard Purdie wrote:
> Since the upgrade of qemux86 to 4.4.1 we're seeing PAT issues when
> starting the X server. We need to fix the problem but the failing
> sanity tests mask out other issues and we need a workaround.
>

I was out of the day and didn't notice if any logs were available
for the issue ? Is there a pointer to the failing logs ?

Obviously I didn't notice this in any of my runs. I'll check 4.4.x
for anything that looks suspicious, and can bisect if needed.

Bruce

> Merge this for now until we can figure out the full issue. This is
> better than changing the kernel defconfig or reverting to old
> kernel versions.
>
> Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
>
> diff --git a/scripts/runqemu-internal b/scripts/runqemu-internal
> index ebed2bd..ad854d1 100755
> --- a/scripts/runqemu-internal
> +++ b/scripts/runqemu-internal
> @@ -434,7 +434,7 @@ if [ "$MACHINE" = "qemux86" ]; then
>       fi
>       # Currently oprofile's event based interrupt mode doesn't work(Bug #828) in
>       # qemux86 and qemux86-64. We can use timer interrupt mode for now.
> -    KERNCMDLINE="$KERNCMDLINE oprofile.timer=1"
> +    KERNCMDLINE="$KERNCMDLINE oprofile.timer=1 nopat"
>   fi
>
>   if [ "$MACHINE" = "qemux86-64" ]; then
>
>