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Re: [Qemu-devel] [PATCH v2 23/25] console: make screendump async
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From: |
Gerd Hoffmann |
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Subject: |
Re: [Qemu-devel] [PATCH v2 23/25] console: make screendump async |
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Date: |
Mon, 23 Jan 2017 13:04:28 +0100 |
Hi,
>
> If you only ref, you could have the image being modified while it is
> being saved asynchronously, this could result in tearing artefacts,
> no?
Yes, but you have that problem _anyway_. screendump qmp command can run
in parallel to guest vcpu, so it can race with guest display updates
today. Assuming they happen as simple framebuffer writes and therefore
don't involve vmexit + grabbing big qemu lock.
cheers,
Gerd
- [Qemu-devel] [PATCH v2 16/25] qmp: update qmp-spec about async capability, (continued)
- [Qemu-devel] [PATCH v2 16/25] qmp: update qmp-spec about async capability, Marc-André Lureau, 2017/01/18
- [Qemu-devel] [PATCH v2 17/25] qtest: add qtest-timeout, Marc-André Lureau, 2017/01/18
- [Qemu-devel] [PATCH v2 19/25] tests: add tests for async and non-async clients, Marc-André Lureau, 2017/01/18
- [Qemu-devel] [PATCH v2 18/25] qtest: add qtest_init_qmp_caps(), Marc-André Lureau, 2017/01/18
- [Qemu-devel] [PATCH v2 20/25] qapi: improve 'screendump' documentation, Marc-André Lureau, 2017/01/18
- [Qemu-devel] [PATCH v2 21/25] console: graphic_hw_update return true if async, Marc-André Lureau, 2017/01/18
- [Qemu-devel] [PATCH v2 22/25] console: add graphic_hw_update_done(), Marc-André Lureau, 2017/01/18
- [Qemu-devel] [PATCH v2 23/25] console: make screendump async, Marc-André Lureau, 2017/01/18
[Qemu-devel] [PATCH v2 24/25] qtest: add /qemu-qmp/screendump test, Marc-André Lureau, 2017/01/18
[Qemu-devel] [PATCH v2 25/25] qmp: move json-message-parser and check to QmpClient, Marc-André Lureau, 2017/01/18
Re: [Qemu-devel] [PATCH v2 00/25] qmp: add async command type, no-reply, 2017/01/18
Re: [Qemu-devel] [PATCH v2 00/25] qmp: add async command type, Stefan Hajnoczi, 2017/01/23