linux-kernel - Re: [PATCH] drm/ci: Default to UART for logging

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Date:   Mon, 9 Oct 2023 08:19:45 -0300
From:   Helen Koike <helen.koike@...labora.com>
To:     Rob Clark <robdclark@...il.com>, dri-devel@...ts.freedesktop.org
Cc:     Emma Anholt <emma@...olt.net>, Rob Clark <robdclark@...omium.org>,
        David Airlie <airlied@...il.com>,
        Daniel Vetter <daniel@...ll.ch>,
        open list <linux-kernel@...r.kernel.org>,
        Guilherme Alcarde Gallo <guilherme.gallo@...labora.com>
Subject: Re: [PATCH] drm/ci: Default to UART for logging

cc +guilherme

On 06/10/2023 14:32, Rob Clark wrote:
> From: Rob Clark <robdclark@...omium.org>
> 
> ssh logging is the default for mesa, as it is generally more reliable.
> But if there are kernel issues, especially at boot, UART logging is
> infinitely more useful.
> 
> Signed-off-by: Rob Clark <robdclark@...omium.org>
> ---
>   drivers/gpu/drm/ci/gitlab-ci.yml | 6 ++++++
>   1 file changed, 6 insertions(+)
> 
> diff --git a/drivers/gpu/drm/ci/gitlab-ci.yml b/drivers/gpu/drm/ci/gitlab-ci.yml
> index 2c4df53f5dfe..7c55f02f7313 100644
> --- a/drivers/gpu/drm/ci/gitlab-ci.yml
> +++ b/drivers/gpu/drm/ci/gitlab-ci.yml
> @@ -27,6 +27,12 @@ variables:
>   
>     LAVA_JOB_PRIORITY: 30
>   
> +  # Default to UART logging.  Mesa uses ssh by default, as that is more
> +  # reliable if you have a stable kernel.  But kernel CI is more likely
> +  # to encounter unstable kernels (and has lower volume of CI jobs so is
> +  # less likely to be troubled by occasional UART flakes)
> +  LAVA_FORCE_UART: 1
> +
>   default:
>     before_script:
>       - export SCRIPTS_DIR=$(mktemp -d)