From: Gerd Hoffmann <kraxel@redhat.com>
To: Zhi Wang <zhi.a.wang@intel.com>,
Alex Williamson <alex.williamson@redhat.com>
Cc: "Wang, Zhenyu Z" <zhenyu.z.wang@intel.com>,
"intel-gfx@lists.freedesktop.org"
<intel-gfx@lists.freedesktop.org>,
"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
"Chen, Xiaoguang" <xiaoguang.chen@intel.com>,
"Zhang, Tina" <tina.zhang@intel.com>,
Kirti Wankhede <kwankhede@nvidia.com>,
"Lv, Zhiyuan" <zhiyuan.lv@intel.com>,
"intel-gvt-dev@lists.freedesktop.org"
<intel-gvt-dev@lists.freedesktop.org>
Subject: Re: [Intel-gfx] [PATCH v9 5/7] vfio: Define vfio based dma-buf operations
Date: Fri, 23 Jun 2017 10:31:28 +0200 [thread overview]
Message-ID: <1498206688.24807.5.camel@redhat.com> (raw)
In-Reply-To: <594CC7F6.7050507@intel.com>
On Fri, 2017-06-23 at 15:49 +0800, Zhi Wang wrote:
> Hi:
> Thanks for the discussions! If the userspace application has
> already maintained a LRU list, it looks like we don't need
> generation
> anymore,
generation isn't required, things are working just fine without that.
It is just a small optimization, userspace can skip the LRU lookup
altogether if the generation didn't change.
But of couse that only pays off if the kernel doesn't has to put much
effort into maintaining the generation id. Something simple like
increasing it each time the guest writes a register which affects
plane_info.
If you think it doesn't make sense from the driver point of view we can
drop the generation.
cheers,
Gerd
next prev parent reply other threads:[~2017-06-23 8:31 UTC|newest]
Thread overview: 55+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-06-15 8:00 [PATCH v9 0/7] drm/i915/gvt: Dma-buf support for GVT-g Xiaoguang Chen
2017-06-15 8:00 ` [PATCH v9 1/7] drm/i915/gvt: Extend the GVT-g architecture Xiaoguang Chen
2017-06-15 8:00 ` [PATCH v9 2/7] drm/i915/gvt: OpRegion support for GVT-g Xiaoguang Chen
2017-06-15 8:00 ` [PATCH v9 3/7] drm: Extend the drm format Xiaoguang Chen
2017-06-15 10:21 ` [Intel-gfx] " Ville Syrjälä
2017-06-20 9:01 ` Zhang, Tina
2017-06-15 8:00 ` [PATCH v9 4/7] drm/i915/gvt: Frame buffer decoder support for GVT-g Xiaoguang Chen
2017-06-15 8:00 ` [PATCH v9 5/7] vfio: Define vfio based dma-buf operations Xiaoguang Chen
2017-06-15 14:51 ` Kirti Wankhede
2017-06-15 16:00 ` Gerd Hoffmann
2017-06-15 20:38 ` Alex Williamson
2017-06-16 10:24 ` Gerd Hoffmann
2017-06-16 12:52 ` Alex Williamson
2017-06-16 13:32 ` Kirti Wankhede
2017-06-16 16:39 ` Alex Williamson
2017-06-16 18:28 ` Kirti Wankhede
2017-06-19 6:34 ` Gerd Hoffmann
2017-06-19 14:54 ` Alex Williamson
2017-06-20 8:35 ` Gerd Hoffmann
2017-06-20 13:55 ` Kirti Wankhede
2017-06-21 7:22 ` Gerd Hoffmann
2017-07-12 13:18 ` Kirti Wankhede
2017-07-14 9:58 ` Gerd Hoffmann
2017-06-19 6:38 ` Gerd Hoffmann
2017-06-19 14:55 ` Alex Williamson
2017-06-20 8:41 ` [Intel-gfx] " Zhang, Tina
2017-06-20 10:57 ` Gerd Hoffmann
2017-06-20 15:00 ` Alex Williamson
2017-06-20 17:07 ` Kirti Wankhede
2017-06-20 23:01 ` Zhang, Tina
2017-06-20 23:22 ` Alex Williamson
2017-06-21 9:20 ` Zhang, Tina
2017-06-21 11:03 ` Gerd Hoffmann
2017-06-21 18:59 ` Alex Williamson
2017-06-22 8:30 ` Gerd Hoffmann
2017-06-22 18:54 ` Alex Williamson
2017-06-23 7:26 ` Gerd Hoffmann
2017-06-23 7:49 ` Zhi Wang
2017-06-23 8:31 ` Gerd Hoffmann [this message]
2017-06-23 16:40 ` Alex Williamson
2017-06-23 17:15 ` Alex Williamson
2017-06-26 6:17 ` Gerd Hoffmann
2017-06-22 0:21 ` Zhang, Tina
2017-06-21 7:34 ` Gerd Hoffmann
2017-06-23 21:58 ` Zhang, Tina
2017-06-26 6:39 ` Gerd Hoffmann
2017-06-26 17:28 ` Alex Williamson
2017-06-27 6:12 ` Gerd Hoffmann
2017-06-28 12:48 ` Zhang, Tina
2017-06-29 6:41 ` Gerd Hoffmann
2017-06-29 8:39 ` Daniel Vetter
2017-07-04 0:47 ` Zhang, Tina
2017-06-20 13:35 ` Kirti Wankhede
2017-06-15 8:00 ` [PATCH v9 6/7] drm/i915/gvt: Dmabuf support for GVT-g Xiaoguang Chen
2017-06-15 8:00 ` [PATCH v9 7/7] drm/i915/gvt: Adding user interface for dma-buf Xiaoguang Chen
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