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Re: [Qemu-devel] [PATCH V3] rtc: fix a infinite loop in windows vm start
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From: |
Eric Blake |
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Subject: |
Re: [Qemu-devel] [PATCH V3] rtc: fix a infinite loop in windows vm startup |
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Date: |
Mon, 24 Jul 2017 06:54:52 -0500 |
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User-agent: |
Mozilla/5.0 (X11; Linux x86_64; rv:52.0) Gecko/20100101 Thunderbird/52.2.1 |
On 07/24/2017 01:35 PM, Peng Hao wrote:
> When a windows vm starts, periodic timer of rtc will stop several times.
> windows kernel will check whether REG_A_UIP is changed. REG_C's interrupt
> flags will not be cleared when periodic timer stops and the update timer
> will switch to alarm timer. So the expiration time of alarm timer is very
> long and REG_A_UIP will not vary.At last windows kernel will repeat to
> check REG_A_UIP all the time.
>
> Signed-off-by: Peng Hao <address@hidden>
> Signed-off-by: Liu Yi <address@hidden>
> ---
When posting a v3, it's useful to tell us (after the --- separator) what
changed from v2, to help us focus on why a v3 was needed.
--
Eric Blake, Principal Software Engineer
Red Hat, Inc. +1-919-301-3266
Virtualization: qemu.org | libvirt.org
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