linux-kernel - Re: [PATCH 1/3] drm/msm: use kvmalloc for ring data in gpu crashstate

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Message-ID: <20181106165242.GA27851@jcrouse-lnx.qualcomm.com>
Date:   Tue, 6 Nov 2018 09:52:42 -0700
From:   Jordan Crouse <jcrouse@...eaurora.org>
To:     Sharat Masetty <smasetty@...eaurora.org>
Cc:     freedreno@...ts.freedesktop.org, dri-devel@...ts.freedesktop.org,
        linux-arm-msm@...r.kernel.org, chris@...is-wilson.co.uk,
        robdclark@...il.com, linux-kernel@...r.kernel.org
Subject: Re: [PATCH 1/3] drm/msm: use kvmalloc for ring data in gpu crashstate

On Tue, Nov 06, 2018 at 11:40:04AM +0530, Sharat Masetty wrote:
> The ringbuffer data to capture at crashtime can end up being large
> sometimes, and the size can vary from being less than a page to the
> full size of 32KB. So use the kvmalloc variant that perfectly fits the bill.
> 
> Signed-off-by: Sharat Masetty <smasetty@...eaurora.org>

Reviewed-by: Jordan Crouse <jcrouse@...eaurora.org>
> ---
>  drivers/gpu/drm/msm/adreno/adreno_gpu.c | 4 ++--
>  1 file changed, 2 insertions(+), 2 deletions(-)
> 
> diff --git a/drivers/gpu/drm/msm/adreno/adreno_gpu.c b/drivers/gpu/drm/msm/adreno/adreno_gpu.c
> index 141062f..c93702d 100644
> --- a/drivers/gpu/drm/msm/adreno/adreno_gpu.c
> +++ b/drivers/gpu/drm/msm/adreno/adreno_gpu.c
> @@ -406,7 +406,7 @@ int adreno_gpu_state_get(struct msm_gpu *gpu, struct msm_gpu_state *state)
>  				size = j + 1;
>  
>  		if (size) {
> -			state->ring[i].data = kmalloc(size << 2, GFP_KERNEL);
> +			state->ring[i].data = kvmalloc(size << 2, GFP_KERNEL);
>  			if (state->ring[i].data) {
>  				memcpy(state->ring[i].data, gpu->rb[i]->start, size << 2);
>  				state->ring[i].data_size = size << 2;
> @@ -445,7 +445,7 @@ void adreno_gpu_state_destroy(struct msm_gpu_state *state)
>  	int i;
>  
>  	for (i = 0; i < ARRAY_SIZE(state->ring); i++)
> -		kfree(state->ring[i].data);
> +		kvfree(state->ring[i].data);
>  
>  	for (i = 0; state->bos && i < state->nr_bos; i++)
>  		kvfree(state->bos[i].data);
> -- 
> 1.9.1
> 

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