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Re: [Qemu-devel] [PATCH v2] Prevent disk data loss when closing qemu

From: Paolo Bonzini
Subject: Re: [Qemu-devel] [PATCH v2] Prevent disk data loss when closing qemu
Date: Thu, 24 May 2012 15:46:49 +0200
User-agent: Mozilla/5.0 (X11; Linux x86_64; rv:12.0) Gecko/20120430 Thunderbird/12.0.1

Il 24/05/2012 14:49, Andreas Färber ha scritto:
>> > -    exit(STATUS_CONTROL_C_EXIT);
>> > +    qemu_system_shutdown_request();
>> > +    /* Windows 7 kills application when the function returns.
>> > +       Sleep here to give QEMU a try for closing */
>> > +    Sleep(10000);
> How do we know that 10000 is enough? Shouldn't we rather block until
> receipt of some completion signal?

After 10s Windows will kill us anyway.  Think of it as SIGTERM/SIGKILL.

Using a completion signal would be more polite (the QEMU process would
disappear as soon as possible), but the outcome would be the same.


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