linux-kernel - Re: [PATCHv2] kvm: remove in_range and switch to rwsem for iobus

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Message-ID: <4A489002.1080106@redhat.com>
Date:	Mon, 29 Jun 2009 12:57:22 +0300
From:	Avi Kivity <avi@...hat.com>
To:	"Michael S. Tsirkin" <mst@...hat.com>
CC:	Gregory Haskins <ghaskins@...ell.com>, kvm@...r.kernel.org,
	linux-kernel@...r.kernel.org, mtosatti@...hat.com,
	paulmck@...ux.vnet.ibm.com, markmc@...hat.com
Subject: Re: [PATCHv2] kvm: remove in_range and switch to rwsem for iobus

On 06/29/2009 12:51 PM, Michael S. Tsirkin wrote:
>> We can convert it to rcu indepenently of other things protected by
>> slots_lock; no need to do everything at the same time.
>>      
>
> Yes but once we merge locks, it will be harder to split them out.
> I know I can now do grep bus_lock and find all places affected,
> if I reuse slot_lock this information is lost. No?
>    

That's true, but for seeing the overall picture, fewer locks are 
better.  I'm more concerned about those looking at all the code (me) 
than those implementing locking improvements (you).

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

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