linux-kernel - Re: [PATCH v2 2/6] drm/amdgpu: Allocate coredump memory in a nonblocking way

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Date:   Fri, 14 Jul 2023 08:59:28 +0200
From:   Christian König <christian.koenig@....com>
To:     André Almeida <andrealmeid@...lia.com>,
        dri-devel@...ts.freedesktop.org, amd-gfx@...ts.freedesktop.org,
        linux-kernel@...r.kernel.org
Cc:     kernel-dev@...lia.com, alexander.deucher@....com,
        pierre-eric.pelloux-prayer@....com,
        'Marek Olšák' <maraeo@...il.com>,
        Samuel Pitoiset <samuel.pitoiset@...il.com>,
        Bas Nieuwenhuizen <bas@...nieuwenhuizen.nl>,
        Timur Kristóf <timur.kristof@...il.com>,
        michel.daenzer@...lbox.org
Subject: Re: [PATCH v2 2/6] drm/amdgpu: Allocate coredump memory in a
 nonblocking way

Am 13.07.23 um 23:32 schrieb André Almeida:
> During a GPU reset, a normal memory reclaim could block to reclaim
> memory. Giving that coredump is a best effort mechanism, it shouldn't
> disturb the reset path. Change its memory allocation flag to a
> nonblocking one.
>
> Signed-off-by: André Almeida <andrealmeid@...lia.com>

Reviewed-by: Christian König <christian.koenig@....com>

> ---
> v2: New patch
>
>   drivers/gpu/drm/amd/amdgpu/amdgpu_device.c | 2 +-
>   1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c
> index e25f085ee886..a824f844a984 100644
> --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c
> +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c
> @@ -5011,7 +5011,7 @@ static void amdgpu_reset_capture_coredumpm(struct amdgpu_device *adev)
>   	struct drm_device *dev = adev_to_drm(adev);
>   
>   	ktime_get_ts64(&adev->reset_time);
> -	dev_coredumpm(dev->dev, THIS_MODULE, adev, 0, GFP_KERNEL,
> +	dev_coredumpm(dev->dev, THIS_MODULE, adev, 0, GFP_NOWAIT,
>   		      amdgpu_devcoredump_read, amdgpu_devcoredump_free);
>   }
>   #endif