Re: Regarding report amount of usable graphics memory

Daniel Vetter <daniel.vetter@xxxxxxxxx> · Wed, 27 Nov 2013 09:06:42 +0100

    On 27/11/2013 06:41, Zhang, Jianhong
      wrote:

        Hi Daniel,

        1.      
              On Harris Beach, we always see this
            report as below even we set different TOLUD size, such
            as1GB, 1.5GB, 2GB and 3GB :
        [drm]
            Memory usable by graphics device = 2048M

               2.
              Based on the implementation below, it shouldn't matter
            with TOLUD size.

                     DRM_INFO("Memory
            Usable by graphics device = %dM\n",
            dev_priv->mm.gtt->gtt_total_entries >> 8);

        Please confirm
            if this is the case:
        If RAM is 4GB,
            it will report 2048M as the usable memory by graphics
            device.
        This is the max
            size that graphics could use,  and it shouldn’t change based
            on TOLUD size.

    Yeah. But the real question is what do you need this for exactly?
    Also, cc'ing relevant internal mailing lists.

    -Daniel

        Best regards,
        Jianhong

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