linux-kernel - Re: [PATCH v1 02/12] xen/hvmlite: Factor out common kernel init code

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Date:	Fri, 22 Jan 2016 18:12:47 -0500
From:	Boris Ostrovsky <boris.ostrovsky@...cle.com>
To:	"Luis R. Rodriguez" <mcgrof@...e.com>
Cc:	david.vrabel@...rix.com, konrad.wilk@...cle.com,
	xen-devel@...ts.xenproject.org, linux-kernel@...r.kernel.org,
	roger.pau@...rix.com
Subject: Re: [PATCH v1 02/12] xen/hvmlite: Factor out common kernel init code

On 01/22/2016 06:01 PM, Luis R. Rodriguez wrote:
> On Fri, Jan 22, 2016 at 04:35:48PM -0500, Boris Ostrovsky wrote:
>> HVMlite guests (to be introduced in subsequent patches) share most
>> of the kernel initialization code with PV(H).
>>
>> Signed-off-by: Boris Ostrovsky <boris.ostrovsky@...cle.com>
>> ---
>>   arch/x86/xen/enlighten.c |  225 ++++++++++++++++++++++++----------------------
>>   1 files changed, 119 insertions(+), 106 deletions(-)
>>
>> diff --git a/arch/x86/xen/enlighten.c b/arch/x86/xen/enlighten.c
>> index d09e4c9..2cf446a 100644
>> --- a/arch/x86/xen/enlighten.c
>> +++ b/arch/x86/xen/enlighten.c
> Whoa, I'm lost, its hard for me to tell what exactly stayed and what
> got pulled into a helper, etc. Is there a possibility to split this
> patch in 2 somehow to make the actual functional changes easier to
> read? There are too many changes here and I just can't tell easily
> what's going on.


The only real changes that this patch introduces is it reorders some of 
the operations that used to be in xen_start_kernel(). This is done so 
that in the next patch when we add hvmlite we can easily put those 
specific to PV(H) inside 'if (!xen_hvm_domain())'. I probably should 
have said so in the commit message.

It is indeed difficult to review but I don't see how I can split this. 
Even if I just moved it (without reordering) it would still be hard to read.

-boris