linux-kernel - Re: [PATCH v7] Add udmabuf misc device

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Message-ID: <1536579068.4810.68.camel@collabora.com>
Date:   Mon, 10 Sep 2018 13:31:08 +0200
From:   Gert Wollny <gert.wollny@...labora.com>
To:     Gerd Hoffmann <kraxel@...hat.com>
Cc:     linux-kernel@...r.kernel.org, David Airlie <airlied@...ux.ie>,
        Tomeu Vizoso <tomeu.vizoso@...labora.com>,
        Laurent Pinchart <laurent.pinchart@...asonboard.com>,
        Daniel Vetter <daniel@...ll.ch>
Subject: Re: [PATCH v7] Add udmabuf misc device

Am Montag, den 10.09.2018, 12:53 +0200 schrieb Gerd Hoffmann:
> 
> By default qemu doesn't use memfd for backing storage, you have to
> explicitly configure qemu that way (see qemu commit log of the test
> branch):
> 
>     qemu-system-x86_64 -m 2G
>             -object memory-backend-memfd,id=ram,size=2G
>             -numa node,memdev=ram"

Thanks, but that doesn't seem to help. Are there any host kernel
configuration parameters or features that I should set (apart from
enabling udmabuf)? 

Best, 
Gert