linux-kernel - Re: [PATCH] amdkfd: use atomic allocations within srcu callbacks

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Date:	Thu, 4 Dec 2014 14:27:44 +0200
From:	Oded Gabbay <oded.gabbay@....com>
To:	Sasha Levin <sasha.levin@...cle.com>
CC:	<airlied@...ux.ie>, <alexander.deucher@....com>,
	<j.glisse@...il.com>, <linux-kernel@...r.kernel.org>,
	<dri-devel@...ts.freedesktop.org>, <John.Bridgman@....com>,
	<Andrew.Lewycky@....com>, <joro@...tes.org>
Subject: Re: [PATCH] amdkfd: use atomic allocations within srcu callbacks



On 12/03/2014 05:19 PM, Sasha Levin wrote:
> srcu callbacks are running in atomic context, we can't allocate using
> __GFP_WAIT.
>
> Signed-off-by: Sasha Levin <sasha.levin@...cle.com>
> ---
>   drivers/gpu/drm/amd/amdkfd/kfd_process.c | 2 +-
>   1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/drivers/gpu/drm/amd/amdkfd/kfd_process.c b/drivers/gpu/drm/amd/amdkfd/kfd_process.c
> index b4f49ac..b85eb0b 100644
> --- a/drivers/gpu/drm/amd/amdkfd/kfd_process.c
> +++ b/drivers/gpu/drm/amd/amdkfd/kfd_process.c
> @@ -196,7 +196,7 @@ static void kfd_process_destroy_delayed(struct rcu_head *rcu)
>   	mmdrop(p->mm);
>
>   	work = (struct kfd_process_release_work *)
> -		kmalloc(sizeof(struct kfd_process_release_work), GFP_KERNEL);
> +		kmalloc(sizeof(struct kfd_process_release_work), GFP_ATOMIC);
>
>   	if (work) {
>   		INIT_WORK((struct work_struct *) work, kfd_process_wq_release);
>

Thanks!
Applied to my -next tree.

Oded
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