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Re: [Qemu-devel] [PULL 21/32] char: clean up remaining chardevs when lea
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From: |
Laszlo Ersek |
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Subject: |
Re: [Qemu-devel] [PULL 21/32] char: clean up remaining chardevs when leaving |
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Date: |
Fri, 1 Jul 2016 17:29:03 +0200 |
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User-agent: |
Mozilla/5.0 (X11; Linux x86_64; rv:45.0) Gecko/20100101 Thunderbird/45.1.1 |
On 07/01/16 17:18, Paolo Bonzini wrote:
>
>
> On 01/07/2016 14:34, Andrew Jones wrote:
>>>>
>> With this patch, I now get
>>
>> qemu: qemu_mutex_destroy: Device or resource busy
>>
>> and a SIGABRT when my arm tcg kvm-unit-tests guest exits
>> (I haven't tried any other guest types yet)
>
> Eric, Laszlo, is it POSIX compliant to fail destruction of a taken mutex?
http://pubs.opengroup.org/onlinepubs/9699919799/functions/pthread_mutex_destroy.html
[...] Attempting to destroy a locked mutex or a mutex that is
referenced (for example, while being used in a
pthread_cond_timedwait() or pthread_cond_wait()) by another thread
results in undefined behavior.
Thus EBUSY is POSIX compliant, because just the attempt is undefined
behavior.
Thanks
Laszlo