linux-kernel - Re: [PATCH v3] dma-buf/heaps: system

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Message-ID: <CABdmKX2fA2nXaSb8k+LE1yeso=ZnboDtxhzmjzrS35GSKv73hQ@mail.gmail.com>
Date:   Wed, 12 Apr 2023 09:49:19 -0700
From:   "T.J. Mercier" <tjmercier@...gle.com>
To:     jaewon31.kim@...sung.com
Cc:     Michal Hocko <mhocko@...e.com>,
        "jstultz@...gle.com" <jstultz@...gle.com>,
        "sumit.semwal@...aro.org" <sumit.semwal@...aro.org>,
        "daniel.vetter@...ll.ch" <daniel.vetter@...ll.ch>,
        "akpm@...ux-foundation.org" <akpm@...ux-foundation.org>,
        "hannes@...xchg.org" <hannes@...xchg.org>,
        "linux-mm@...ck.org" <linux-mm@...ck.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "jaewon31.kim@...il.com" <jaewon31.kim@...il.com>
Subject: Re: [PATCH v3] dma-buf/heaps: system_heap: avoid too much allocation

On Wed, Apr 12, 2023 at 4:38 AM Jaewon Kim <jaewon31.kim@...sung.com> wrote:

> Yes I think you're right. As a allocator, dma-buf system heap looks to be loose
> in memory allocation. Limiting dmabuf memory may be required. But I think there
> is no nice and reasonable way so far. And the dma-buf system heap is being
> widely used in Android mobile system. AFAIK the camera consumes huge memory
> through this dma-buf system heap. I actually even looked a huge size request
> over 2GB in one dma-buf request.
>
Hey can you point me to where you saw a request that big? That's a
non-buggy request?!