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Re: [Qemu-devel] [RFC PATCH] qemu_mutux: make the iothread recursive (MT


From: Alex Bennée
Subject: Re: [Qemu-devel] [RFC PATCH] qemu_mutux: make the iothread recursive (MTTCG)
Date: Tue, 23 Jun 2015 13:55:33 +0100

Paolo Bonzini <address@hidden> writes:

> On 23/06/2015 14:21, Alex Bennée wrote:
>> While I was testing multi-threaded TCG I discovered once consequence of
>> using locking around memory_region_dispatch is that virt-io transactions
>> could dead lock trying to grab the main mutex. This is due to the
>> virt-io driver writing data back into the system memory:
>
> Have you looked at the patches I posted last week?
>
> http://thread.gmane.org/gmane.comp.emulators.qemu/345258

No, but I will do now ;-)

I sent this to the list so Mark and Fred could see what I'd done when I
hit the virt-io problem.

-- 
Alex Bennée



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