linux-kernel - Re: [EXT] Re: [PATCH] media: videobuf2-dma-sg: limit the sg segment size

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Message-ID: <CAAFQd5BQ+FsuKipxE-yh3P-NbPdc_U=FHp7PBkWY-xunxthKuA@mail.gmail.com>
Date:   Wed, 13 Sep 2023 18:44:15 +0900
From:   Tomasz Figa <tfiga@...omium.org>
To:     Hui Fang <hui.fang@....com>
Cc:     Anle Pan <anle.pan@....com>,
        "m.szyprowski@...sung.com" <m.szyprowski@...sung.com>,
        "mchehab@...nel.org" <mchehab@...nel.org>,
        "linux-media@...r.kernel.org" <linux-media@...r.kernel.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        Jindong Yue <jindong.yue@....com>,
        Xuegang Liu <xuegang.liu@....com>, Xu Yang <xu.yang_2@....com>
Subject: Re: [EXT] Re: [PATCH] media: videobuf2-dma-sg: limit the sg segment size

On Wed, Sep 13, 2023 at 6:14 PM Hui Fang <hui.fang@....com> wrote:
>
> On Tue, Sep 12, 2023 at 16:52 PM Tomasz Figa <tfiga@...omium.org> wrote:
> > Right. You may want to try modifying vb2_dma_sg_alloc_compacted() to use
> > dma_alloc_pages() instead of alloc_pages().
>
> Thanks for your suggestion, it works. And it's a better resolution since no need
> an extra copy from high buffer to low buffer.

Great to hear! Could you submit a patch? Would appreciate adding

Suggested-by: Tomasz Figa <tfiga@...omium.org>

above the Signed-off-by line if you don't mind. Thanks.

Best regards,
Tomasz