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From: Avi Kivity <avi@redhat.com>
To: Pekka Enberg <penberg@kernel.org>
Cc: Paolo Bonzini <pbonzini@redhat.com>, Ingo Molnar <mingo@elte.hu>,
	Sasha Levin <levinsasha928@gmail.com>,
	john@jfloren.net, kvm@vger.kernel.org, asias.hejun@gmail.com,
	gorcunov@gmail.com, prasadjoshi124@gmail.com
Subject: Re: [PATCH 5/5 V2] kvm tools: Initialize and use VESA and VNC
Date: Tue, 24 May 2011 17:37:02 +0300	[thread overview]
Message-ID: <4DDBC28E.8080009@redhat.com> (raw)
In-Reply-To: <4DDB9972.5050501@redhat.com>

On 05/24/2011 02:41 PM, Avi Kivity wrote:
>
>> We switched to u64 and friends for two reasons: (1) using uint*_t
>> turned out to be painful when using kernel headers (e.g., mptables,
>> e820, etc.) and (2) we want to be as close as possible to the coding
>> style of tools/perf to be able to reuse their code in the future.
>>
>
> Regarding this reuse, I see it's done by copy/paste.  Won't it be 
> better to have tools/lib and have tools/perf and tools/kvm use that?
>

Another thing, I believe reuse of actual kernel code has limited 
utility.  The kernel has vast infrastructure and porting all of it to 
userspace would be a huge undertaking.  It's pretty common for code to 
use printk(), kmalloc(), slab caches, rcu, various locks, per-cpu 
variables.  Are you going to port all of it?  and maintain it when it 
changes?

It's a lot easier to use the native userspace stacks.

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


  parent reply	other threads:[~2011-05-24 14:37 UTC|newest]

Thread overview: 43+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2011-05-23 11:19 [PATCH 1/5 V2] kvm tools: Add BIOS INT10 handler Sasha Levin
2011-05-23 11:19 ` [PATCH 2/5 V2] kvm tools: Add video mode to kernel initialization Sasha Levin
2011-05-23 11:30   ` Ingo Molnar
2011-05-23 11:19 ` [PATCH 3/5 V2] kvm tools: Add VESA device Sasha Levin
2011-05-23 11:32   ` Ingo Molnar
2011-05-23 11:19 ` [PATCH 4/5 V2] kvm tools: Update makefile and feature tests Sasha Levin
2011-05-23 11:19 ` [PATCH 5/5 V2] kvm tools: Initialize and use VESA and VNC Sasha Levin
2011-05-23 11:38   ` Ingo Molnar
2011-05-23 11:45     ` Pekka Enberg
2011-05-24  8:37     ` Paolo Bonzini
2011-05-24  8:50       ` Ingo Molnar
2011-05-24  9:10         ` Paolo Bonzini
2011-05-24  9:55           ` Pekka Enberg
2011-05-24 11:22             ` Avi Kivity
2011-05-24 11:26               ` Pekka Enberg
2011-05-24 11:30                 ` Sasha Levin
2011-05-24 11:30                 ` Avi Kivity
2011-05-24 11:38                   ` Pekka Enberg
2011-05-24 11:41                     ` Avi Kivity
2011-05-24 11:56                       ` Pekka Enberg
2011-05-24 12:27                         ` Paolo Bonzini
2011-05-24 14:38                           ` Avi Kivity
2011-05-24 14:37                       ` Avi Kivity [this message]
2011-05-24 14:54                         ` Pekka Enberg
2011-05-24 19:03                           ` Ingo Molnar
2011-05-24 19:00                     ` Ingo Molnar
2011-05-24 19:16           ` Ingo Molnar
2011-05-24  9:18         ` Paolo Bonzini
2011-05-24 19:40           ` Ingo Molnar
2011-05-25  8:21             ` Paolo Bonzini
2011-05-25  8:32               ` Ingo Molnar
2011-05-25  9:15                 ` Paolo Bonzini
2011-05-25  9:36                   ` Ingo Molnar
2011-05-25 10:01                     ` Paolo Bonzini
2011-05-25 10:17                       ` Ingo Molnar
2011-05-25 10:44                         ` Paolo Bonzini
2011-05-25 12:53                           ` Ingo Molnar
2011-05-25 15:37                             ` Paolo Bonzini
2011-05-25  9:49                   ` Ingo Molnar
2011-05-25  8:38               ` Ingo Molnar
2011-05-24  8:51       ` Cyrill Gorcunov
2011-05-23 14:10   ` Pekka Enberg
2011-05-23 11:29 ` [PATCH 1/5 V2] kvm tools: Add BIOS INT10 handler Ingo Molnar

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