From: "Marc-André Lureau" <marcandre.lureau@gmail.com>
To: QEMU <qemu-devel@nongnu.org>, Gerd Hoffmann <kraxel@redhat.com>
Cc: Dave Airlie <airlied@gmail.com>
Subject: [Qemu-devel] virtio-gpu: cursor update not in sync with resource update
Date: Mon, 14 Sep 2015 14:40:08 +0200 [thread overview]
Message-ID: <CAJ+F1CKywA+Y9-aJ4oK=j72VZq6BS7CX_SKqWrfZCK3o9TOWog@mail.gmail.com> (raw)
Hi
Afaik, the goal of the seperate cursor queue is to update cursor
quickly (probably to give good input responsiveness). However, the
VIRTIO_GPU_CMD_UPDATE_CURSOR references a surface that is uploaded via
the ctrl queue. The same resource id may be reused for cursor update.
But there is no synchronization between the two queues. So often, the
cursor set results in last update being shown. Should the kernel wait
for the update to finish? But then why having 2 different queues?
Should the update be done on the cursor queue instead? or should the
different cursor be cached (with different id) and qemu to do the
synchronization?
--
Marc-André Lureau
next reply other threads:[~2015-09-14 12:40 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-09-14 12:40 Marc-André Lureau [this message]
2015-09-14 14:06 ` [Qemu-devel] virtio-gpu: cursor update not in sync with resource update Gerd Hoffmann
2015-09-14 15:17 ` Marc-André Lureau
2015-09-14 21:08 ` Dave Airlie
2015-09-14 21:14 ` Marc-André Lureau
2015-09-14 21:18 ` Dave Airlie
2015-09-15 6:20 ` Gerd Hoffmann
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