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Date: Tue, 23 Aug 2011 09:02:00 -0500
From: Anthony Liguori <anthony@codemonkey.ws>
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Subject: Re: [Qemu-devel] [PATCH v2] posix-aio-compat: fix latency issues
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To: Jan Kiszka <jan.kiszka@siemens.com>
Cc: Kevin Wolf <kwolf@redhat.com>, Stefan Hajnoczi <stefanha@gmail.com>, Avi Kivity <avi@redhat.com>, "kvm@vger.kernel.org" <kvm@vger.kernel.org>, "qemu-devel@nongnu.org" <qemu-devel@nongnu.org>

On 08/23/2011 08:02 AM, Jan Kiszka wrote:
> On 2011-08-23 14:40, Anthony Liguori wrote:
>> You should be able to just use an eventfd or pipe.
>>
>> Better yet, we should look at using GThreadPool to replace posix-aio-compat.
>
> When interacting with the thread pool is part of some time-critical path
> (easily possible with a real-time Linux guest), general-purpose
> implementations like what glib offers are typically out of the game.
> They do not provide sufficient customizability, specifically control
> over their internal synchronization and allocation policies. That
> applies to the other rather primitive glib threading and locking
> services as well.

We can certainly enhance glib.  glib is a cross platform library.  I 
don't see a compelling reason to invent a new cross platform library 
just for QEMU especially if the justification is future features, not 
current features.

Regards,

Anthony Liguori

>
> Jan
>