linux-kernel - Re: [PATCHv3 01/11] videobuf2: add cache management members

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Date:   Fri, 28 Feb 2020 10:25:14 +0900
From:   Sergey Senozhatsky <senozhatsky@...omium.org>
To:     Hans Verkuil <hverkuil@...all.nl>
Cc:     Sergey Senozhatsky <senozhatsky@...omium.org>,
        Hans Verkuil <hans.verkuil@...co.com>,
        Tomasz Figa <tfiga@...omium.org>,
        Mauro Carvalho Chehab <mchehab@...nel.org>,
        Kyungmin Park <kyungmin.park@...sung.com>,
        Marek Szyprowski <m.szyprowski@...sung.com>,
        Sakari Ailus <sakari.ailus@....fi>,
        Laurent Pinchart <laurent.pinchart@...asonboard.com>,
        Pawel Osciak <posciak@...omium.org>,
        linux-media@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCHv3 01/11] videobuf2: add cache management members

On (20/02/27 12:55), Hans Verkuil wrote:
> On 2/26/20 12:15 PM, Sergey Senozhatsky wrote:
> > Extend vb2_buffer and vb2_queue structs with cache management
> > members.
> > 
> > V4L2 UAPI already contains two buffer flags which user-space,
> > supposedly, can use to control buffer cache sync:
> > 
> > - V4L2_BUF_FLAG_NO_CACHE_INVALIDATE
> > - V4L2_BUF_FLAG_NO_CACHE_CLEAN
> > 
> > None of these, however, do anything at the moment. This patch
> > set is intended to change it.
> > 
> > Since user-space cache management hints are supposed to be
> > implemented on a per-buffer basis we need to extend vb2_buffer
> > struct with two new memebers ->need_cache_sync_on_prepare and
> 
> memebers -> members
> 

  meme bears  :)

	-ss