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Re: [Qemu-devel] [PATCH] kvm: First step to push iothread lock out of in

From: Avi Kivity
Subject: Re: [Qemu-devel] [PATCH] kvm: First step to push iothread lock out of inner run loop
Date: Wed, 27 Jun 2012 10:54:59 +0300
User-agent: Mozilla/5.0 (X11; Linux x86_64; rv:13.0) Gecko/20120605 Thunderbird/13.0 
On 06/26/2012 10:34 PM, Marcelo Tosatti wrote:
> 
> 1.  read_lock(memmap_lock)
> 2.  MemoryRegionSection mrs = lookup(addr)
> 3.  qom_ref(mrs.mr->dev)
> 4.  read_unlock(memmap_lock)
> 
> 5.  mutex_lock(dev->lock)
> 6.  dispatch(&mrs, addr, data, size)
> 7.  mutex_unlock(dev->lock)
> 
> 8.  qom_unref(mrs.mr->object)

The plan also includes eventually replacing read_lock() with rcu; so two
devices can be accessed in parallel with no cacheline bouncing.

-- 
error compiling committee.c: too many arguments to function
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